Rotex RHBH04CB3V Installer's Reference Manual

ROTEX HPSU low temperature Bi‑bloc English + Installer reference guide ROTEX HPSU low temperature Bi‑bloc RRLQ004-006-008CA RHBH/X04+08CB

Installer reference guide 2 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Table of contents 1 General safety precautions 3 1.1 About the documentation .......................................................... 3 1.1.1 Meaning of warnings and symbols.............................. 3 1.2 For the installer.......................................................................... 4 1.2.1 General ....................................................................... 4 1.2.2 Installation site ............................................................ 4 1.2.3 Refrigerant .................................................................. 4 1.2.4 Brine............................................................................ 5 1.2.5 Water .......................................................................... 5 1.2.6 Electrical ..................................................................... 5 2 About the documentation 6 2.1 About this document.................................................................. 6 2.2 Installer reference guide at a glance ......................................... 6 3 About the box 7 3.1 Overview: About the box ........................................................... 7 3.2 Outdoor unit............................................................................... 7 3.2.1 To unpack the outdoor unit ......................................... 7 3.2.2 To remove the accessories from the outdoor unit....... 7 3.3 Indoor unit ................................................................................. 8 3.3.1 To unpack the indoor unit ........................................... 8 3.3.2 To remove the accessories from the indoor unit......... 8 4 About the units and options 8 4.1 Overview: About the units and options...................................... 8 4.2 Identification .............................................................................. 9 4.2.1 Identification label: Outdoor unit ................................. 9 4.2.2 Identification label: Indoor unit .................................... 9 4.3 Combining units and options..................................................... 9 4.3.1 Possible options for the outdoor unit........................... 9 4.3.2 Possible options for the indoor unit............................. 9 4.3.3 Possible combinations of indoor unit and outdoor unit .............................................................................. 10 5 Application guidelines 10 5.1 Overview: Application guidelines............................................... 10 5.2 Setting up the space heating/cooling system............................ 11 5.2.1 Single room................................................................. 11 5.2.2 Multiple rooms – One LWT zone ................................ 13 5.2.3 Multiple rooms – Two LWT zones............................... 14 5.3 Setting up an auxiliary heat source for space heating............... 16 5.4 Setting up the domestic hot water tank ..................................... 17 5.4.1 System layout – Integrated DHW tank........................ 17 5.4.2 System layout – Standalone DHW tank...................... 17 5.4.3 Selecting the volume and desired temperature for the DHW tank.............................................................. 17 5.4.4 Setup and configuration – DHW tank.......................... 18 5.4.5 DHW pump for instant hot water................................. 18 5.4.6 DHW pump for disinfection ......................................... 19 5.5 Setting up the energy metering ................................................. 19 5.5.1 Produced heat............................................................. 19 5.5.2 Consumed energy....................................................... 19 5.5.3 Normal kWh rate power supply................................... 19 5.5.4 Preferential kWh rate power supply............................ 20 5.6 Setting up the power consumption control ................................ 20 5.6.1 Permanent power limitation ........................................ 20 5.6.2 Power limitation activated by digital inputs ................. 21 5.6.3 Power limitation process............................................. 21 5.7 Setting up an external temperature sensor ............................... 22 6 Preparation 22 6.1 Overview: Preparation............................................................... 22 6.2 Preparing installation site .......................................................... 22 6.2.1 Installation site requirements of the outdoor unit ........ 22 6.2.2 Additional installation site requirements of the outdoor unit in cold climates ....................................... 23 6.2.3 Installation site requirements of the indoor unit ........... 23 6.3 Preparing refrigerant piping........................................................ 24 6.3.1 Refrigerant piping requirements................................... 24 6.3.2 Refrigerant piping insulation ........................................ 24 6.4 Preparing water piping ............................................................... 24 6.4.1 Water circuit requirements........................................... 24 6.4.2 Formula to calculate the expansion vessel pre- pressure....................................................................... 25 6.4.3 To check the water volume and flow rate .................... 25 6.4.4 Changing the pre-pressure of the expansion vessel.... 26 6.4.5 To check the water volume: Examples ........................ 27 6.5 Preparing electrical wiring .......................................................... 27 6.5.1 About preparing electrical wiring.................................. 27 6.5.2 About preferential kWh rate power supply................... 27 6.5.3 Overview of electrical connections except external actuators ...................................................................... 28 6.5.4 Overview of electrical connections for external and internal actuators ......................................................... 28 7 Installation 29 7.1 Overview: Installation ................................................................. 29 7.2 Opening the units ....................................................................... 29 7.2.1 About opening the units ............................................... 29 7.2.2 To open the outdoor unit.............................................. 29 7.2.3 To open the indoor unit................................................ 29 7.2.4 To open the switch box cover of the indoor unit .......... 29 7.3 Mounting the outdoor unit........................................................... 29 7.3.1 About mounting the outdoor unit.................................. 29 7.3.2 Precautions when mounting the outdoor unit............... 29 7.3.3 To provide the installation structure............................. 30 7.3.4 To install the outdoor unit............................................. 30 7.3.5 To provide drainage..................................................... 31 7.3.6 To prevent the outdoor unit from falling over ............... 31 7.4 Mounting the indoor unit............................................................. 32 7.4.1 About mounting the indoor unit.................................... 32 7.4.2 Precautions when mounting the indoor unit................. 32 7.4.3 To install the indoor unit............................................... 32 7.4.4 To install the drain pan kit............................................ 33 7.5 Connecting the refrigerant piping ............................................... 33 7.5.1 About connecting the refrigerant piping ....................... 33 7.5.2 Precautions when connecting the refrigerant piping.... 33 7.5.3 Guidelines when connecting the refrigerant piping...... 33 7.5.4 Pipe bending guidelines............................................... 34 7.5.5 To flare the pipe end.................................................... 34 7.5.6 To braze the pipe end.................................................. 34 7.5.7 Using the stop valve and service port.......................... 34 7.5.8 To connect the refrigerant piping to the outdoor unit ... 35 7.5.9 To connect the refrigerant piping to the indoor unit ..... 35 7.6 Checking the refrigerant piping .................................................. 35 7.6.1 About checking the refrigerant piping .......................... 35 7.6.2 Precautions when checking the refrigerant piping ....... 36 7.6.3 To check for leaks........................................................ 36 7.6.4 To perform vacuum drying........................................... 36 7.7 Charging refrigerant ................................................................... 36 7.7.1 About charging refrigerant ........................................... 36 7.7.2 Precautions when charging refrigerant ........................ 37 7.7.3 To determine the additional refrigerant amount........... 37 7.7.4 To determine the complete recharge amount.............. 37 7.7.5 To charge additional refrigerant................................... 37 7.7.6 To fix the fluorinated greenhouse gases label ............. 37 7.8 Connecting the water piping....................................................... 38 7.8.1 About connecting the water piping............................... 38 7.8.2 Precautions when connecting the water piping............ 38 7.8.3 To connect the water piping......................................... 38 7.8.4 To fill the water circuit .................................................. 38 7.8.5 To fill the domestic hot water tank ............................... 38 7.8.6 To insulate the water piping......................................... 39 7.9 Connecting the electrical wiring.................................................. 39 7.9.1 About connecting the electrical wiring.......................... 39 7.9.2 About electrical compliance ......................................... 39

Installer reference guide 3 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 7.9.3 Precautions when connecting the electrical wiring ..... 39 7.9.4 Guidelines when connecting the electrical wiring ....... 39 7.9.5 To connect the electrical wiring on the outdoor unit.... 39 7.9.6 To connect the electrical wiring on the indoor unit...... 40 7.9.7 To connect the main power supply ............................. 40 7.9.8 To connect the backup heater power supply .............. 41 7.9.9 To connect the user interface ..................................... 42 7.9.10 To connect the shut-off valve...................................... 43 7.9.11 To connect the electrical meters................................. 43 7.9.12 To connect the domestic hot water pump................... 44 7.9.13 To connect the alarm output ....................................... 44 7.9.14 To connect the space cooling/heating ON/OFF output.......................................................................... 44 7.9.15 To connect the changeover to external heat source... 44 7.9.16 To connect the power consumption digital inputs....... 44 7.9.17 To connect the safety thermostat (normal closed contact) ....................................................................... 44 7.10 Finishing the outdoor unit installation........................................ 45 7.10.1 To finish the outdoor unit installation .......................... 45 7.10.2 To close the outdoor unit ............................................ 45 7.11 Finishing the indoor unit installation .......................................... 45 7.11.1 To fix the user interface cover to the indoor unit......... 45 7.11.2 To close the indoor unit............................................... 45 8 Configuration 45 8.1 Overview: Configuration ............................................................ 45 8.1.1 To connect the PC cable to the switch box................. 46 8.1.2 To access the most used commands ......................... 46 8.1.3 To copy the system settings from the first to the second user interface.................................................. 47 8.1.4 To copy the language set from the first to the second user interface .............................................................. 47 8.1.5 Quick wizard: Set the system layout after first power ON............................................................................... 47 8.2 Basic configuration.................................................................... 48 8.2.1 Quick wizard: Language / time and date..................... 48 8.2.2 Quick wizard: Standard............................................... 48 8.2.3 Quick wizard: Options................................................. 49 8.2.4 Quick wizard: Capacities (energy metering) ............... 52 8.2.5 Space heating/cooling control..................................... 52 8.2.6 Domestic hot water control ......................................... 55 8.2.7 Contact/helpdesk number........................................... 56 8.3 Advanced configuration/optimization......................................... 56 8.3.1 Space heating/cooling operation: advanced............... 56 8.3.2 Domestic hot water control: advanced........................ 60 8.3.3 Heat source settings ................................................... 65 8.3.4 System settings........................................................... 67 8.4 Menu structure: Overview user settings.................................... 71 8.5 Menu structure: Overview installer settings............................... 72 9 Commissioning 73 9.1 Overview: Commissioning......................................................... 73 9.2 Precautions when commissioning ............................................. 73 9.3 Checklist before commissioning................................................ 73 9.4 Checklist during commissioning ................................................ 73 9.4.1 To check the minimum flow rate ................................. 74 9.4.2 Air purge function........................................................ 74 9.4.3 To perform a test run .................................................. 75 9.4.4 To perform an actuator test run .................................. 75 9.4.5 Underfloor heating screed dryout................................ 75 10 Hand-over to the user 76 11 Maintenance and service 77 11.1 Overview: Maintenance and service ......................................... 77 11.2 Maintenance safety precautions................................................ 77 11.2.1 Opening the indoor unit............................................... 77 11.3 Checklist for yearly maintenance of the outdoor unit ................ 77 11.4 Checklist for yearly maintenance of the indoor unit................... 77 12 Troubleshooting 78 12.1 Overview: Troubleshooting......................................................... 78 12.2 Precautions when troubleshooting ............................................. 78 12.3 Solving problems based on symptoms....................................... 78 12.3.1 Symptom: The unit is NOT heating or cooling as expected ...................................................................... 78 12.3.2 Symptom: The compressor does NOT start (space heating or domestic water heating).............................. 78 12.3.3 Symptom: The pump is making noise (cavitation) ....... 79 12.3.4 Symptom: The pressure relief valve opens.................. 79 12.3.5 Symptom: The water pressure relief valve leaks ......... 79 12.3.6 Symptom: The space is NOT sufficiently heated at low outdoor temperatures ............................................ 79 12.3.7 Symptom: The pressure at the tapping point is temporarily unusually high ........................................... 80 12.3.8 Symptom: Decoration panels are pushed away due to a swollen tank .......................................................... 80 12.3.9 Symptom: Tank disinfection function is NOT completed correctly (AH-error)..................................... 80 12.4 Solving problems based on error codes..................................... 80 12.4.1 Error codes: Overview ................................................. 80 13 Disposal 83 13.1 Overview: Disposal..................................................................... 83 13.2 To pump down............................................................................ 83 13.3 To start and stop forced cooling................................................. 83 14 Technical data 84 14.1 Piping diagram: Outdoor unit...................................................... 84 14.2 Piping diagram: Indoor unit ........................................................ 85 14.3 Wiring diagram: Outdoor unit ..................................................... 86 14.4 Wiring diagram: Indoor unit ........................................................ 86 14.5 Drain pan necessity.................................................................... 90 14.6 ESP curve: Indoor unit ............................................................... 91 15 Glossary 91 16 Field settings table 92 1 General safety precautions 1.1 About the documentation ▪ The original documentation is written in English. All other languages are translations. ▪ The precautions described in this document cover very important topics, follow them carefully. ▪ The installation of the system, and all activities described in the installation manual and the installer reference guide must be performed by an authorized installer. 1.1.1 Meaning of warnings and symbols DANGER Indicates a situation that results in death or serious injury. DANGER: RISK OF ELECTROCUTION Indicates a situation that could result in electrocution. DANGER: RISK OF BURNING Indicates a situation that could result in burning because of extreme hot or cold temperatures. DANGER: RISK OF EXPLOSION Indicates a situation that could result in explosion. WARNING Indicates a situation that could result in death or serious injury.

Installer reference guide 4 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 WARNING: FLAMMABLE MATERIAL CAUTION Indicates a situation that could result in minor or moderate injury. NOTICE Indicates a situation that could result in equipment or property damage. INFORMATION Indicates useful tips or additional information. Symbol Explanation Before installation, read the installation and operation manual, and the wiring instruction sheet. Before performing maintenance and service tasks, read the service manual. For more information, see the installer and user reference guide. 1.2 For the installer 1.2.1 General If you are not sure how to install or operate the unit, contact your dealer. NOTICE Improper installation or attachment of equipment or accessories could result in electric shock, short-circuit, leaks, fire or other damage to the equipment. Only use accessories, optional equipment and spare parts made or approved by ROTEX. WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the ROTEX documentation). CAUTION Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system. WARNING Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible risk: suffocation. DANGER: RISK OF BURNING ▪ Do NOT touch the refrigerant piping, water piping or internal parts during and immediately after operation. It could be too hot or too cold. Give it time to return to normal temperature. If you must touch it, wear protective gloves. ▪ Do NOT touch any accidental leaking refrigerant. WARNING Provide adequate measures to prevent that the unit can be used as a shelter by small animals. Small animals that make contact with electrical parts can cause malfunctions, smoke or fire. CAUTION Do NOT touch the air inlet or aluminium fins of the unit. NOTICE ▪ Do NOT place any objects or equipment on top of the unit. ▪ Do NOT sit, climb or stand on the unit. NOTICE Works executed on the outdoor unit are best done under dry weather conditions to avoid water ingress. In accordance with the applicable legislation, it might be necessary to provide a logbook with the product containing at least: information on maintenance, repair work, results of tests, stand-by periods,… Also, at least, following information must be provided at an accessible place at the product: ▪ Instructions for shutting down the system in case of an emergency ▪ Name and address of fire department, police and hospital ▪ Name, address and day and night telephone numbers for obtaining service In Europe, EN378 provides the necessary guidance for this logbook. 1.2.2 Installation site ▪ Provide sufficient space around the unit for servicing and air circulation. ▪ Make sure the installation site withstands the unit's weight and vibration. ▪ Make sure the area is well ventilated. Do NOT block any ventilation openings. ▪ Make sure the unit is level. Do NOT install the unit in the following places: ▪ In potentially explosive atmospheres. ▪ In places where there is machinery that emits electromagnetic waves. Electromagnetic waves may disturb the control system, and cause malfunction of the equipment. ▪ In places where there is a risk of fire due to the leakage of flammable gases (example: thinner or gasoline), carbon fibre, ignitable dust. ▪ In places where corrosive gas (example: sulphurous acid gas) is produced. Corrosion of copper pipes or soldered parts may cause the refrigerant to leak. 1.2.3 Refrigerant If applicable. See the installation manual or installer reference guide of your application for more information. NOTICE Make sure refrigerant piping installation complies with applicable legislation. In Europe, EN378 is the applicable standard. NOTICE Make sure the field piping and connections are not subjected to stress. WARNING During tests, NEVER pressurize the product with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit).

Installer reference guide 5 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 WARNING Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks, ventilate the area immediately. Possible risks: ▪ Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency. ▪ Toxic gas may be produced if refrigerant gas comes into contact with fire. DANGER: RISK OF EXPLOSION Pump down – Refrigerant leakage. If you want to pump down the system, and there is a leakage in the refrigerant circuit: ▪ Do NOT use the unit's automatic pump down function, with which you can collect all refrigerant from the system into the outdoor unit. Possible consequence: Self-combustion and explosion of the compressor because of air going into the operating compressor. ▪ Use a separate recovery system so that the unit's compressor does NOT have to operate. WARNING Always recover the refrigerant. Do NOT release them directly into the environment. Use a vacuum pump to evacuate the installation. NOTICE After all the piping has been connected, make sure there is no gas leak. Use nitrogen to perform a gas leak detection. NOTICE ▪ To avoid compressor breakdown, do NOT charge more than the specified amount of refrigerant. ▪ When the refrigerant system is to be opened, refrigerant must be treated according to the applicable legislation. WARNING Make sure there is no oxygen in the system. Refrigerant may only be charged after performing the leak test and the vacuum drying. ▪ In case re-charge is required, refer to the nameplate of the unit. It states the type of refrigerant and necessary amount. ▪ The unit is factory charged with refrigerant and depending on pipe sizes and pipe lengths some systems require additional charging of refrigerant. ▪ Only use tools exclusively for the refrigerant type used in the system, this to ensure pressure resistance and prevent foreign materials from entering into the system. ▪ Charge the liquid refrigerant as follows: If Then A siphon tube is present (i.e., the cylinder is marked with "Liquid filling siphon attached") Charge with the cylinder upright. A siphon tube is NOT present Charge with the cylinder upside down. ▪ Open refrigerant cylinders slowly. ▪ Charge the refrigerant in liquid form. Adding it in gas form may prevent normal operation. CAUTION When the refrigerant charging procedure is done or when pausing, close the valve of the refrigerant tank immediately. If the valve is not closed immediately, remaining pressure might charge additional refrigerant. Possible consequence: Incorrect refrigerant amount. 1.2.4 Brine If applicable. See the installation manual or installer reference guide of your application for more information. WARNING The selection of the brine MUST be in accordance with the applicable legislation. WARNING Take sufficient precautions in case of brine leakage. If brine leaks, ventilate the area immediately and contact your local dealer. WARNING The ambient temperature inside the unit can get much higher than that of the room, e.g. 70°C. In case of a brine leak, hot parts inside the unit can create a hazardous situation. WARNING The use and installation of the application MUST comply with the safety and environmental precautions specified in the applicable legislation. 1.2.5 Water If applicable. See the installation manual or installer reference guide of your application for more information. NOTICE Make sure water quality complies with EU directive 98/83 EC. 1.2.6 Electrical DANGER: RISK OF ELECTROCUTION ▪ Turn OFF all power supply before removing the switch  box cover, connecting electrical wiring or touching electrical parts. ▪ Disconnect the power supply for more than 1  minute, and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing. The voltage MUST be less than 50  V  DC before you can touch electrical components. For the location of the terminals, see the wiring diagram. ▪ Do NOT touch electrical components with wet hands. ▪ Do NOT leave the unit unattended when the service cover is removed. WARNING If NOT factory installed, a main switch or other means for disconnection, having a contact separation in all poles providing full disconnection under overvoltage category III condition, MUST be installed in the fixed wiring.

Installer reference guide 6 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 WARNING ▪ ONLY use copper wires. ▪ Make sure the field wiring complies with the applicable legislation. ▪ All field wiring must be performed in accordance with the wiring diagram supplied with the product. ▪ NEVER squeeze bundled cables and make sure they do not come in contact with the piping and sharp edges. Make sure no external pressure is applied to the terminal connections. ▪ Make sure to install earth wiring. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Incomplete earth may cause electrical shock. ▪ Make sure to use a dedicated power circuit. NEVER use a power supply shared by another appliance. ▪ Make sure to install the required fuses or circuit breakers. ▪ Make sure to install an earth leakage protector. Failure to do so may cause electric shock or fire. ▪ When installing the earth leakage protector, make sure it is compatible with the inverter (resistant to high frequency electric noise) to avoid unnecessary opening of the earth leakage protector. NOTICE Precautions when laying power wiring: ▪ Do not connect wiring of different thicknesses to the power terminal block (slack in the power wiring may cause abnormal heat). ▪ When connecting wiring which is the same thickness, do as shown in the figure below. ▪ For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure being exerted on the terminal board. ▪ Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head will damage the head and make proper tightening impossible. ▪ Over-tightening the terminal screws may break them. Install power cables at least 1 metre away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 1 metre may not be sufficient. WARNING ▪ After finishing the electrical work, confirm that each electrical component and terminal inside the electrical components box is connected securely. ▪ Make sure all covers are closed before starting up the unit. NOTICE Only applicable if the power supply is three‑phase, and the compressor has an ON/OFF starting method. If there exists the possibility of reversed phase after a momentary black out and the power goes on and off while the product is operating, attach a reversed phase protection circuit locally. Running the product in reversed phase can break the compressor and other parts. 2 About the documentation 2.1 About this document Target audience Authorised installers Documentation set This document is part of a documentation set. The complete set consists of: ▪ General safety precautions: ▪ Safety instructions that you must read before installing ▪ Format: Paper (in the box of the indoor unit) ▪ Indoor unit installation manual: ▪ Installation instructions ▪ Format: Paper (in the box of the indoor unit) ▪ Outdoor unit installation manual: ▪ Installation instructions ▪ Format: Paper (in the box of the outdoor unit) ▪ Installer reference guide: ▪ Preparation of the installation, good practices, reference data,… ▪ Format: Digital files on the ROTEX homepage ▪ Addendum book for optional equipment: ▪ Additional info about how to install optional equipment ▪ Format: Paper (in the box of the indoor unit) + Digital files on the ROTEX homepage Latest revisions of the supplied documentation may be available on the regional ROTEX website or via your dealer. The original documentation is written in English. All other languages are translations. 2.2 Installer reference guide at a glance Chapter Description General safety precautions Safety instructions that you must read before installing About the documentation What documentation exists for the installer About the box How to unpack the units and remove their accessories About the units and options ▪ How to identify the units ▪ Possible combinations of units and options Application guidelines Various installation setups of the system Preparation What to do and know before going on‑site Installation What to do and know to install the system Configuration What to do and know to configure the system after it is installed Commissioning What to do and know to commission the system after it is configured Hand‑over to the user What to give and explain to the user Maintenance and service How to maintain and service the units Troubleshooting What to do in case of problems Disposal How to dispose of the system

Installer reference guide 7 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Chapter Description Technical data Specifications of the system Glossary Definition of terms Field settings table Table to be filled in by the installer, and kept for future reference Note: There is also an installer settings table in the user reference guide. This table has to be filled in by the installer and handed over to the user. 3 About the box 3.1 Overview: About the box This chapter describes what you have to do after the boxes with the outdoor and indoor unit are delivered on-site. It contains information about: ▪ Unpacking and handling the units ▪ Removing the accessories from the units Keep the following in mind: ▪ At delivery, the unit must be checked for damage. Any damage must be reported immediately to the carrier's claims agent. ▪ Bring the packed unit as close as possible to its final installation position to prevent damage during transport. 3.2 Outdoor unit 3.2.1 To unpack the outdoor unit 1 2 3.2.2 To remove the accessories from the outdoor unit 1 Lift the outdoor unit. CAUTION Only handle the outdoor unit as follows: 57kg 2 Remove the accessories at the bottom of the package. a d b c 1× 1× 1× 2× a Outdoor unit installation manual b Fluorinated greenhouse gases label c Multilingual fluorinated greenhouse gases label d Unit mounting plate

Installer reference guide 8 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 3.3 Indoor unit 3.3.1 To unpack the indoor unit a a a General safety precautions, indoor unit installation manual, operation manual and addendum book for optional equipment INFORMATION Do NOT throw away the upper cardboard cover. On the outside of the cardboard cover, the installation pattern is printed. 3.3.2 To remove the accessories from the indoor unit The general safety precautions, the indoor unit installation manual, the operation manual and the addendum book for optional equipment are located in the upper part of the box. Follow the procedure below to remove the other accessories. 1 Remove the tape. 2× 2 Tilt the bottom side of the front panel upwards and remove it. 3 Remove the accessories. g e+f h 2× 1× 1× 1× 1× 1× 1× a b c d f 2× e g h a General safety precautions b Addendum book for optional equipment c Indoor unit installation manual d Operation manual e Sealing ring for shut-off valve f Shut-off valve g User interface cover h Top plate of indoor unit 4 About the units and options 4.1 Overview: About the units and options This chapter contains information about:

Installer reference guide 9 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 ▪ Identifying the outdoor unit ▪ Identifying the indoor unit ▪ Combining outdoor and indoor units ▪ Combining the outdoor unit with options ▪ Combining the indoor unit with options 4.2 Identification NOTICE When installing or servicing several units at the same time, make sure NOT to switch the service panels between different models. 4.2.1 Identification label: Outdoor unit Location Model identification Example: RR L Q 006 CA V3 Code Explanation RR Split outdoor pair heat pump L Low water temperature – ambient zone: −10~ −20°C Q Refrigerant R410A 006 Capacity class CA Model series V3 Power supply 4.2.2 Identification label: Indoor unit Location Model identification Example: R HB H 04 CB 3V Code Description R ROTEX model HB Wall-mounted indoor unit H H=Heating only X=Heating/cooling 04 Capacity class Code Description CB Model series 3V Backup heater model 4.3 Combining units and options 4.3.1 Possible options for the outdoor unit Drain pan (EKDP008CA) The drain pan is required to gather the drain from the outdoor unit. The drain pan kit consists of: ▪ Drain pan ▪ Installation brackets For installation instructions, see the installation manual of the drain pan. Drain pan heater (EKDPH008CA) The drain pan heater is required to avoid freezing-up of the drain pan. It is recommended to install this option in colder regions with possible low ambient temperatures or heavy snowfall. For installation instructions, see the installation manual of the drain pan heater. INFORMATION In case the drain pan heater is used, the jumper JP_DP on the service PCB on the outdoor unit MUST be cut. After cutting the jumper, you MUST reset the outdoor unit to activate this function. U-beams (EKFT008CA) The U-beams are installation brackets on which the outdoor unit can be installed. It is recommended to install this option in colder regions with possible low ambient temperatures or heavy snowfall. For installation instructions, see the installation manual of the outdoor unit. 4.3.2 Possible options for the indoor unit User interface (RKRUCBL*) The user interface and a possible additional user interface are available as an option. The additional user interface can be connected: ▪ To have both: ▪ control close to the indoor unit, ▪ room thermostat functionality in the principal space to be heated. ▪ To have an interface containing other languages. Following user interfaces are available: ▪ RKRUCBL1 contains following languages: German, French, Dutch, Italian. ▪ RKRUCBL2 contains following languages: English, Swedish, Norwegian, Finnish. ▪ RKRUCBL3 contains following languages: English, Spanish, Greek, Portuguese. ▪ RKRUCBL4 contains following languages: English, Turkish, Polish, Romanian. ▪ RKRUCBL5 contains following languages: German, Czech, Slovenian, Slovakian.

Installer reference guide 10 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 ▪ RKRUCBL6 contains following languages: English, Croatian, Hungarian, Estonian. ▪ RKRUCBL7 contains following languages: English, German, Russian, Danish. Languages on the user interface can be uploaded by PC software or copied from an user interface to the other. For installation instructions, see "7.9.9  To connect the user interface" on page 42. Room thermostat (RKRTWA, RKRTR1, RTRNETA) You can connect an optional room thermostat to the indoor unit. This thermostat can either be wired (RKRTWA) or wireless (RKRTR1 and RTRNETA). Thermostat RTRNETA can only be used in heating-only systems. For installation instructions, see the installation manual of the room thermostat and addendum book for optional equipment. Remote sensor for wireless thermostat (EKRTETS) You can use a wireless indoor temperature sensor (EKRTETS) only in combination with the wireless thermostat (RKRTR1). For installation intructions, see the installation manual of the room thermostat and addendum book for optional equipment. Digital I/O PCB (EKRP1HB) The digital I/O PCB is required to provide following signals: ▪ Alarm output ▪ Space heating/cooling On/OFF output ▪ Changeover to external heat source For installation instructions, see the installation manual of the digital I/O PCB and addendum book for optional equipment. Demand PCB (EKRP1AHTA) To enable the power saving consumption control by digital inputs you must install the demand PCB. For installation instructions, see the installation manual of the demand PCB and addendum book for optional equipment. Remote outdoor sensor (EKRSCA1) By default the sensor inside the outdoor unit will be used to measure the outdoor temperature. As an option the remote outdoor sensor can be installed to measure the outdoor temperature on another location (e.g. to avoid direct sunlight) to have an improved system behaviour. For installation instructions, see the installation manual of the remote outdoor sensor. PC configurator (EKPCCAB) The PC cable makes a connection between the switch box of the indoor unit and a PC. It gives the possibility to upload different language files to the user interface and indoor parameters to the indoor unit. For the available language files, contact your local dealer. The software and corresponding operating instructions are available on the ROTEX homepage. For installation instructions, see the installation manual of the PC cable and "8 Configuration" on page 45. Heat pump convector (RFWXV) For providing space heating/cooling, it is possible to use heat pump convectors (RFWXV). For installation instructions, refer to the installation manual of the heat pump convectors, and the addendum book for optional equipment. Drain pan kit (EKHBDPCA2) The drain pan is required to drain accumulated condensation from the indoor unit. It is required during low temperature cooling operation of the indoor unit and when the leaving water temperature is <18°C. For installation instructions, see the installation manual of the drain pan kit. Domestic hot water tank The domestic hot water tank can be connected to the indoor unit for providing domestic hot water. LAN adapter for smartphone control + Smart Grid applications (BRP069A61) You can install this LAN adapter to: ▪ Control the system via a smartphone app. ▪ Use the system in various Smart Grid applications. For installation instructions, see the installation manual of the LAN adapter. LAN adapter for smartphone control (BRP069A62) You can install this LAN adapter to control the system via a smartphone app. For installation instructions, see the installation manual of the LAN adapter. 4.3.3 Possible combinations of indoor unit and outdoor unit Indoor unit Outdoor unit RRLQ004CAV3 RRLQ006CAV3 RRLQ008CAV3 RHBH04CB3V O — — RHBX04CB3V O — — RHBH08CB3V — O O RHBX08CB3V — O O RHBH08CB9W — O O RHBX08CB9W — O O 5 Application guidelines 5.1 Overview: Application guidelines The purpose of the application guidelines is to give a glance of the possibilities of the ROTEX heat pump system.

Installer reference guide 11 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 NOTICE ▪ The illustrations in the application guidelines are meant for reference only, and are NOT to be used as detailed hydraulic diagrams. The detailed hydraulic dimensioning and balancing are NOT shown, and are the responsibility of the installer. ▪ For more information about the configuration settings to optimize heat pump operation, see "8 Configuration" on page 45. This chapter contains application guidelines for: ▪ Setting up the space heating/cooling system ▪ Setting up an auxiliary heat source for space heating ▪ Setting up the domestic hot water tank ▪ Setting up the energy metering ▪ Setting up the power consumption ▪ Setting up an external temperature sensor 5.2 Setting up the space heating/ cooling system The heat pump system supplies leaving water to heat emitters in one or more rooms. Because the system offers a wide flexibility to control the temperature in each room, you need to answer the following questions first: ▪ How many rooms are heated or cooled by the ROTEX heat pump system? ▪ Which heat emitter types are used in each room and what is their design leaving water temperature? Once the space heating/cooling requirements are clear, ROTEX recommends to follow the setup guidelines below. NOTICE If an external room thermostat is used, the external room thermostat will control the room frost protection. However, the room frost protection is only possible if the leaving water temperature control on the unit's user interface is turned ON. INFORMATION In case an external room thermostat is used and room frost protection needs to be guaranteed in all conditions, then you have to set auto emergency [A.6.C] to 1. 5.2.1 Single room Under floor heating or radiators – Wired room thermostat Setup B A a A Main leaving water temperature zone B One single room a User interface used as room thermostat ▪ The under floor heating or radiators are directly connected to the indoor unit. ▪ The room temperature is controlled by the user interface, which is used as room thermostat. Possible installations: ▪ User interface installed in the room and used as room thermostat ▪ User interface installed at the indoor unit and used for control close to the indoor unit + user interface installed in the room and used as room thermostat Configuration Setting Value Unit temperature control: ▪ #: [A.2.1.7] ▪ Code: [C-07] 2 (RT control): Unit operation is decided based on the ambient temperature of the user interface. Number of water temperature zones: ▪ #: [A.2.1.8] ▪ Code: [7-02] 0 (1 LWT zone): Main Benefits ▪ Cost effective. You do NOT need an additional external room thermostat. ▪ Highest comfort and efficiency. The smart room thermostat functionality can decrease or increase the desired leaving water temperature based on the actual room temperature (modulation). This results in: ▪ Stable room temperature matching the desired temperature (higher comfort) ▪ Less ON/OFF cycles (more quiet, higher comfort and higher efficiency) ▪ Lowest possible leaving water temperature (higher efficiency) ▪ Easy. You can easily set the desired room temperature via the user interface: ▪ For your daily needs, you can use preset values and schedules. ▪ To deviate from your daily needs, you can temporarily overrule the preset values and schedules, use the holiday mode… Under floor heating or radiators – Wireless room thermostat Setup B A b a A Main leaving water temperature zone B One single room a Receiver for wireless external room thermostat b Wireless external room thermostat ▪ The under floor heating or radiators are directly connected to the indoor unit. ▪ The room temperature is controlled by the wireless external room thermostat (optional equipment RKRTR1).

Installer reference guide 12 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Configuration Setting Value Unit temperature control: ▪ #: [A.2.1.7] ▪ Code: [C-07] 1 (Ext RT control): Unit operation is decided by the external thermostat. Number of water temperature zones: ▪ #: [A.2.1.8] ▪ Code: [7-02] 0 (1 LWT zone): Main External room thermostat for the main zone: ▪ #: [A.2.2.4] ▪ Code: [C-05] 1 (Thermo ON/OFF): When the used external room thermostat or heat pump convector can only send a thermo ON/OFF condition. Benefits ▪ Wireless. The ROTEX external room thermostat is available in a wireless version. ▪ Efficiency. Although the external room thermostat only sends ON/ OFF signals, it is specifically designed for the heat pump system. ▪ Comfort. In case of under  floor heating, the wireless external room thermostat prevents condensation on the floor during cooling operation by measuring the room humidity. Heat pump convectors Setup B A a A Main leaving water temperature zone B One single room a Remote controller of the heat pump convectors ▪ The heat  pump convectors are directly connected to the indoor unit. ▪ The desired room temperature is set via the remote controller of the heat pump convectors. ▪ The space heating/cooling demand signal is sent to one digital input on the indoor unit (X2M/1 and X2M/4). ▪ The space operation mode is sent to the heat pump convectors by one digital output on the indoor unit (X2M/32 and X2M/33). INFORMATION When using multiple heat  pump convectors, make sure each one receives the infrared signal from the remote controller of the heat pump convectors. Configuration Setting Value Unit temperature control: ▪ #: [A.2.1.7] ▪ Code: [C-07] 1 (Ext RT control): Unit operation is decided by the external thermostat. Setting Value Number of water temperature zones: ▪ #: [A.2.1.8] ▪ Code: [7-02] 0 (1 LWT zone): Main External room thermostat for the main zone: ▪ #: [A.2.2.4] ▪ Code: [C-05] 1 (Thermo ON/OFF): When the used external room thermostat or heat pump convector can only send a thermo ON/OFF condition. No separation between heating or cooling demand. Benefits ▪ Cooling. The heat pump convector offers, besides heating capacity, also excellent cooling capacity. ▪ Efficiency. Optimal energy efficiency because of the interlink function. ▪ Stylish. Combination: Under floor heating + Heat pump convectors ▪ Space heating is provided by: ▪ The under floor heating ▪ The heat pump convectors ▪ Space cooling is provided by the heat pump convectors only. The under floor heating is shut off by the shut-off valve. Setup B A a M1 A Main leaving water temperature zone B One single room a Remote controller of the heat pump convectors ▪ The heat  pump convectors are directly connected to the indoor unit. ▪ A shut-off valve (field supply) is installed before the under  floor heating to prevent condensation on the floor during cooling operation. ▪ The desired room temperature is set via the remote controller of the heat pump convectors. ▪ The space heating/cooling demand signal is sent to one digital input on the indoor unit (X2M/1 and X2M/4) ▪ The space operation mode is sent by one digital output (X2M/32 and X2M/33) on the indoor unit to: ▪ The heat pump convectors ▪ The shut-off valve Configuration Setting Value Unit temperature control: ▪ #: [A.2.1.7] ▪ Code: [C-07] 1 (Ext RT control): Unit operation is decided by the external thermostat.

Installer reference guide 13 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Setting Value Number of water temperature zones: ▪ #: [A.2.1.8] ▪ Code: [7-02] 0 (1 LWT zone): Main External room thermostat for the main zone: ▪ #: [A.2.2.4] ▪ Code: [C-05] 1 (Thermo ON/OFF): When the used external room thermostat or heat pump convector can only send a thermo ON/OFF condition. No separation between heating or cooling demand. Benefits ▪ Cooling. Heat  pump convectors provide, besides heating capacity, also excellent cooling capacity. ▪ Efficiency. Under  floor heating has the best performance with ROTEX HPSU. ▪ Comfort. The combination of the two heat emitter types provides: ▪ The excellent heating comfort of the under floor heating ▪ The excellent cooling comfort of the heat pump convectors 5.2.2 Multiple rooms – One LWT zone If only one leaving water temperature zone is needed because the design leaving water temperature of all heat emitters is the same, you do NOT need a mixing valve station (cost effective). Example: If the heat  pump system is used to heat up one floor where all the rooms have the same heat emitters. Under floor heating or radiators – Thermostatic valves If you are heating up rooms with under floor heating or radiators, a very common way is to control the temperature of the main room by using a thermostat (this can either be the user interface or an external room thermostat), while the other rooms are controlled by so-called thermostatic valves, which open or close depending on the room temperature. Setup T B C A a A Main leaving water temperature zone B Room 1 C Room 2 a User interface ▪ The under floor heating of the main room is directly connected to the indoor unit. ▪ The room temperature of the main room is controlled by the user interface used as thermostat. ▪ A thermostatic valve is installed before the under floor heating in each of the other rooms. INFORMATION Mind situations where the main room can be heated by another heating source. Example: Fireplaces. Configuration Setting Value Unit temperature control: ▪ #: [A.2.1.7] ▪ Code: [C-07] 2 (RT control): Unit operation is decided based on the ambient temperature of the user interface. Number of water temperature zones: ▪ #: [A.2.1.8] ▪ Code: [7-02] 0 (1 LWT zone): Main Benefits ▪ Cost effective. ▪ Easy. Same installation as for one room, but with thermostatic valves. Under floor heating or radiators – Multiple external room thermostats Setup M2 M1 B C A a a b A Main leaving water temperature zone B Room 1 C Room 2 a External room thermostat b Bypass valve ▪ For each room, a shut-off valve (field supplied) is installed to avoid leaving water supply when there is no heating or cooling demand. ▪ A bypass valve must be installed to make water recirculation possible when all shut-off valves are closed. To guarantee reliable operation, provide a minimum water flow as described in table "To check the water volume and flow rate" in "6.4  Preparing water piping" on page 24. ▪ The user interface connected to the indoor unit decides the space operation mode. Mind that the operation mode on each room thermostat must be set to match the indoor unit. ▪ The room thermostats are connected to the shut-off valves, but do NOT have to be connected to the indoor unit. The indoor unit will supply leaving water all the time, with the possibility to program a leaving water schedule. Configuration Setting Value Unit temperature control: ▪ #: [A.2.1.7] ▪ Code: [C-07] 0 (LWT control): Unit operation is decided based on the leaving water temperature. Number of water temperature zones: ▪ #: [A.2.1.8] ▪ Code: [7-02] 0 (1 LWT zone): Main Benefits Compared with under floor heating or radiators for one room:

Installer reference guide 14 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 ▪ Comfort. You can set the desired room temperature, including schedules, for each room via the room thermostats. Heat pump convectors - Multiple rooms Setup B A a a C A Main leaving water temperature zone B Room 1 C Room 2 a Remote controller of the heat pump convectors ▪ The desired room temperature is set via the remote controller of the heat pump convectors. ▪ The user interface connected to the indoor unit decides the space operation mode. ▪ The heating or cooling demand signals of each heat  pump convector are connected in parallel to the digital input on the indoor unit (X2M/1 and X2M/4). The indoor unit will only supply leaving water temperature when there is an actual demand. INFORMATION To increase comfort and performance, ROTEX recommends to install the valve kit option EKVKHPC on each heat pump convector. Configuration Setting Value Unit temperature control: ▪ #: [A.2.1.7] ▪ Code: [C-07] 1 (Ext RT control): Unit operation is decided by the external thermostat. Number of water temperature zones: ▪ #: [A.2.1.8] ▪ Code: [7-02] 0 (1 LWT zone): Main Benefits Compared with heat pump convectors for one room: ▪ Comfort. You can set the desired room temperature, including schedules, for each room via the remote controller of the heat pump convectors. Combination: Under floor heating + Heat pump convectors Setup b B C A a M1 M1 A Main leaving water temperature zone B Room 1 C Room 2 a External room thermostat b Remote controller of the heat pump convectors ▪ For each room with heat  pump convectors: The heat  pump convectors are directly connected to the indoor unit. ▪ For each room with under floor heating: Two shut-off valves (field supply) are installed before the under floor heating: ▪ A shut-off valve to prevent hot water supply when the room has no heating demand ▪ A shut-off valve to prevent condensation on the floor during cooling operation of the rooms with heat pump convectors. ▪ For each room with heat  pump convectors: The desired room temperature is set via the remote controller of the heat  pump convectors. ▪ For each room with under  floor heating: The desired room temperature is set via the external room thermostat (wired or wireless). ▪ The user interface connected to the indoor unit decides the space operation mode. Mind that the operation mode on each external room thermostat and remote controller of the heat  pump convectors must be set to match the indoor unit. INFORMATION To increase comfort and performance, ROTEX recommends to install the valve kit option EKVKHPC on each heat pump convector. Configuration Setting Value Unit temperature control: ▪ #: [A.2.1.7] ▪ Code: [C-07] 0 (LWT control): Unit operation is decided based on the leaving water temperature. Number of water temperature zones: ▪ #: [A.2.1.8] ▪ Code: [7-02] 0 (1 LWT zone): Main 5.2.3 Multiple rooms – Two LWT zones If the heat emitters selected for each room are designed for different leaving water temperatures, you can use different leaving water temperature zones (maximum 2). In this document: ▪ Main zone = Zone with the lowest design temperature in heating, and the highest design temperature in cooling ▪ Additional zone = The other zone

Installer reference guide 15 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 CAUTION When there is more than one leaving water zone, you must ALWAYS install a mixing valve station in the main zone to decrease (in heating)/increase (in cooling) the leaving water temperature when the additional zone has demand. Typical example: Room (zone) Heat emitters: Design temperature Living room (main zone) Under floor heating: ▪ In heating: 35°C ▪ In cooling: 20°C (only refreshment, no real cooling allowed) Bed rooms (additional zone) Heat pump convectors: ▪ In heating: 45°C ▪ In cooling: 12°C Setup B A a a C E D b c d A Additional leaving water temperature zone B Room 1 C Room 2 D Main leaving water temperature zone E Room 3 a Remote controller of the heat pump convectors b User interface c Mixing valve station d Pressure regulating valve INFORMATION A pressure regulating valve should be implemented before the mixing valve station. This is to guarantee the correct water flow balance between the main leaving water temperature zone and the additional leaving water temperature zone in relation to the required capacity of both water temperature zones. ▪ For the main zone: ▪ A mixing valve station is installed before the under floor heating. ▪ The pump of the mixing valve station is controlled by the ON/ OFF signal on the indoor unit (X2M/5 and X2M/7; normal closed shut-off valve output). ▪ The room temperature is controlled by the user interface, which is used as room thermostat. ▪ For the additional zone: ▪ The heat pump convectors are directly connected to the indoor unit. ▪ The desired room temperature is set via the remote controller of the heat pump convectors for each room. ▪ The heating or cooling demand signals of each heat  pump convector are connected in parallel to the digital input on the indoor unit (X2M/1 and X2M/4). The indoor unit will only supply the desired additional leaving water temperature when there is an actual demand. ▪ The user interface connected to the indoor unit decides the space operation mode. Mind that the operation mode on each remote controller of the heat pump convectors must be set to match the indoor unit. Configuration Setting Value Unit temperature control: ▪ #: [A.2.1.7] ▪ Code: [C-07] 2 (RT control): Unit operation is decided based on the ambient temperature of the user interface. Note: ▪ Main room = user interface used as room thermostat functionality ▪ Other rooms = external room thermostat functionality Number of water temperature zones: ▪ #: [A.2.1.8] ▪ Code: [7-02] 1 (2 LWT zones): Main + additional In case of heat pump convectors: External room thermostat for the additional zone: ▪ #: [A.2.2.5] ▪ Code: [C-06] 1 (Thermo ON/OFF): When the used external room thermostat or heat pump convector can only send a thermo ON/OFF condition. No separation between heating or cooling demand. Shut-off valve output Set to follow the thermo demand of the main zone. Shut-off valve If the main zone must be shut off during cooling mode to prevent condensation on the floor, set it accordingly. At the mixing valve station Set the desired main leaving water temperature for heating and/or cooling. Benefits ▪ Comfort. ▪ The smart room thermostat functionality can decrease or increase the desired leaving water temperature based on the actual room temperature (modulation). ▪ The combination of the two heat emitter systems provides the excellent heating comfort of the under  floor heating, and the excellent cooling comfort of the heat pump convectors. ▪ Efficiency. ▪ Depending on the demand, the indoor unit supplies different leaving water temperature matching the design temperature of the different heat emitters. ▪ Under  floor heating has the best performance with ROTEX HPSU.

Installer reference guide 16 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 5.3 Setting up an auxiliary heat source for space heating ▪ Space heating can be done by: ▪ The indoor unit ▪ An auxiliary boiler (field supply) connected to the system ▪ When the room thermostat requests heating, the indoor unit or the auxiliary boiler starts operating depending on the outdoor temperature (status of the changeover to external heat source). When the permission is given to the auxiliary boiler, the space heating by the indoor unit is turned OFF. ▪ Bivalent operation is only possible for space heating, NOT for domestic hot water production. Domestic hot water is always produced by the DHW tank connected to the indoor unit. INFORMATION ▪ During heating operation of the heat  pump, the heat pump operates to achieve the desired temperature set via the user interface. When weather- dependent operation is active, the water temperature is determined automatically depending on the outdoor temperature. ▪ During heating operation of the auxiliary boiler, the auxiliary boiler operates to achieve the desired water temperature set via the auxiliary boiler controller. Setup ▪ Integrate the auxiliary boiler as follows: Only for RHBH/X a b c d e f g h j FHL1 FHL2 FHL3 M h i i l k f m n Only for RHVH/X a b c d e f f g h j FHL1 FHL2 FHL3 M h i i l k m n a Outdoor unit b Indoor unit c Heat exchanger d Backup heater e Pump f Shut-off valve g Motorised 3‑way valve (delivered with DHW tank) h Non-return valve (field supply) i Shut-off valve (field supply) j Collector (field supply) k Auxiliary boiler (field supply) l Aquastat valve (field supply) m DHW tank (RHBH/X: option) n Heat exchanger coil FHL1...3 Under floor heating NOTICE ▪ Make sure the auxiliary boiler and its integration in the system complies with applicable legislation. ▪ ROTEX is NOT responsible for incorrect or unsafe situations in the auxiliary boiler system.

Installer reference guide 17 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 ▪ Make sure the return water to the heat pump does NOT exceed 55°C. To do so: ▪ Set the desired water temperature via the auxiliary boiler controller to maximum 55°C. ▪ Install an aquastat valve in the return water flow of the heat pump. ▪ Set the aquastat valve to close above 55°C and to open below 55°C. ▪ Install non-return valves. ▪ Make sure to only have one expansion vessel in the water circuit. An expansion vessel is already premounted in the indoor unit. ▪ Install the digital I/O PCB (option EKRP1HB). ▪ Connect X1 and X2 (changeover to external heat source) on the PCB to the auxiliary boiler thermostat. ▪ To setup the heat emitters, see "5.2 Setting up the space heating/ cooling system" on page 11. Configuration Via the user interface (quick wizard): ▪ Set the use of a bivalent system as external heat source. ▪ Set the bivalent temperature and hysteresis. NOTICE ▪ Make sure the bivalent hysteresis has enough differential to prevent frequent changeover between indoor unit and auxiliary boiler. ▪ Because the outdoor temperature is measured by the outdoor unit air thermistor, install the outdoor unit in the shadow so that it is NOT influenced or turned ON/OFF by direct sunlight. ▪ Frequent changeover may cause corrosion of the auxiliary boiler. Contact the manufacturer of the auxiliary boiler for more information. Changeover to external heat source decided by an auxiliary contact ▪ Only possible in external room thermostat control AND one leaving water temperature zone (see "5.2  Setting up the space heating/cooling system" on page 11). ▪ The auxiliary contact can be: ▪ An outdoor temperature thermostat ▪ An electricity tariff contact ▪ A manually operated contact ▪ … ▪ Setup: Connect the following field wiring: L N H Com A K2A K1A X2M BTI K2A K1A Indoor/Auto/Boiler 1 2 3 4 X Y Indoor BTI Boiler thermostat input A Auxiliary contact (normal closed) H Heating demand room thermostat (optional) K1A Auxiliary relay for activation of indoor unit (field supply) K2A Auxiliary relay for activation of boiler (field supply) Indoor Indoor unit Auto Automatic Boiler Boiler NOTICE ▪ Make sure the auxiliary contact has enough differential or time delay to prevent frequent changeover between indoor unit and auxiliary boiler. ▪ If the auxiliary contact is an outdoor temperature thermostat, install the thermostat in the shadow so that it is NOT influenced or turned ON/OFF by direct sunlight. ▪ Frequent changeover may cause corrosion of the auxiliary boiler. Contact the manufacturer of the auxiliary boiler for more information. 5.4 Setting up the domestic hot water tank 5.4.1 System layout – Integrated DHW tank Only for RHVH/X. a Outdoor unit b Indoor unit c Heat exchanger d Backup heater e Pump f Motorised 3‑way valve g DHW tank h Shut-off valve i Collector (field supply) FHL1...3 Under floor heating UI User interface 5.4.2 System layout – Standalone DHW tank Only for RHBH/X. FHL1 FHL2 FHL3 M a b c d e h f g f i j a Outdoor unit b Indoor unit c Heat exchanger d Backup heater e Pump f Shut-off valve g Motorised 3‑way valve h Collector (field supply) i DHW tank j Heat exchanger coil FHL1...3 Under floor heating 5.4.3 Selecting the volume and desired temperature for the DHW tank People experience water as hot when its temperature is 40°C. Therefore, the DHW consumption is always expressed as equivalent hot water volume at 40°C. However, you can set the DHW tank temperature at a higher temperature (example: 53°C), which is then mixed with cold water (example: 15°C).

Installer reference guide 18 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Selecting the volume and desired temperature for the DHW tank consists of: 1 Determining the DHW consumption (equivalent hot water volume at 40°C). 2 Determining the volume and desired temperature for the DHW tank. Possible DHW tank volumes Depending on the available options, tanks with the following volumes are available: Type Possible volumes Standalone DHW tank ▪ 150 l ▪ 200 l ▪ 300 l ▪ 500 l Energy saving tips ▪ If the DHW consumption differs from day to day, you can program a weekly schedule with different desired DHW tank temperatures for each day. ▪ The lower the desired DHW tank temperature, the more cost effective. By selecting a larger DHW tank, you can lower the desired DHW tank temperature. ▪ The heat pump itself can produce domestic hot water of maximum 55°C (50°C if outdoor temperature is low). The electrical resistance integrated in the heat  pump can increase this temperature. However, this consumes more energy. ROTEX recommends to set the desired DHW tank temperature below 55°C to avoid using the electrical resistance. ▪ The higher the outdoor temperature, the better the performance of the heat pump. ▪ If energy prices are the same during the day and the night, ROTEX recommends to heat up the DHW tank during the day. ▪ If energy prices are lower during the night, ROTEX recommends to heat up the DHW tank during the night. ▪ When the heat pump produces domestic hot water, it cannot heat up a space. When you need domestic hot water and space heating at the same, ROTEX recommends to produce the domestic hot water during the night when there is lower space heating demand. Determining the DHW consumption Answer the following questions and calculate the DHW consumption (equivalent hot water volume at 40°C) using the typical water volumes: Question Typical water volume How many showers are needed per day? 1 shower = 10 min×10 l/min = 100 l How many baths are needed per day? 1 bath = 150 l How much water is needed at the kitchen sink per day? 1 sink = 2 min×5 l/min = 10 l Are there any other domestic hot water needs? — Example: If the DHW consumption of a family (4 persons) per day is as follows: ▪ 3 showers ▪ 1 bath ▪ 3 sink volumes Then the DHW consumption = (3×100 l)+(1×150 l)+(3×10 l)=480 l Determining the volume and desired temperature for the DHW tank Formula Example V1=V2+V2×(T2−40)/(40−T1) If: ▪ V2=180 l ▪ T2=54°C ▪ T1=15°C Then V1=280 l V2=V1×(40−T1)/(T2−T1) If: ▪ V1=480 l ▪ T2=54°C ▪ T1=15°C Then V2=307 l V1 DHW consumption (equivalent hot water volume at 40°C) V2 Required DHW tank volume if only heated once T2 DHW tank temperature T1 Cold water temperature 5.4.4 Setup and configuration – DHW tank ▪ For large DHW consumptions, you can heat up the DHW tank several times during the day. ▪ To heat up the DHW tank to the desired DHW tank temperature, you can use the following energy sources: ▪ Thermodynamic cycle of the heat pump ▪ Electrical backup heater (for integrated DHW tank) ▪ Electrical booster heater (for standalone DHW tank) ▪ For more information about: ▪ Optimizing the energy consumption for producing domestic hot water, see "8 Configuration" on page 45. ▪ Connecting the electrical wiring of the standalone DHW tank to the indoor unit, see the installation manual of the DHW tank. ▪ Connecting the water piping of the standalone DHW tank to the indoor unit, see the installation manual of the DHW tank. 5.4.5 DHW pump for instant hot water Setup c f a b g h i a Indoor unit b DHW tank c DHW pump (field supply) f Shower (field supply) g Cold water h Domestic hot water OUT i Recirculation connection ▪ By connecting a DHW pump, instant hot water can be available at the tap. ▪ The DHW pump and the installation are field supply and the responsibility of the installer. ▪ For more information about connecting the recirculation connection: ▪ for integrated DHW tank, see "7 Installation" on page 29, ▪ for separate DHW tank, see installation manual of DHW tank. Configuration ▪ For more information, see "8 Configuration" on page 45.

Installer reference guide 19 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 ▪ You can program a schedule to control the DHW pump via the user interface. For more information, see the user reference guide. 5.4.6 DHW pump for disinfection Setup c a b d f e g h i a Indoor unit b DHW tank c DHW pump (field supply) d Heater element (field supply) e Non‑return valve (field supply) f Shower (field supply) g Cold water h Domestic hot water OUT i Recirculation connection ▪ The DHW pump is field-supplied and its installation is the responsibility of the installer. ▪ For the integrated DHW tank, the temperature of the DHW tank can be set to maximum 60°C. If applicable legislation requires higher temperature for disinfection, you can connect a DHW pump and heater element as shown above. ▪ If applicable legislation requires disinfection of the water piping until the tapping point, you can connect a DHW pump and heater element (if needed) as shown above. Configuration The indoor unit can control DHW pump operation. For more information, see "8 Configuration" on page 45. 5.5 Setting up the energy metering ▪ Via the user interface, you can read out the following energy data: ▪ Produced heat ▪ Consumed energy ▪ You can read out the energy data: ▪ For space heating ▪ For space cooling ▪ For domestic hot water production ▪ You can read out the energy data: ▪ Per month ▪ Per year INFORMATION The calculated produced heat and consumed energy are an estimation, the accuracy cannot be guaranteed. 5.5.1 Produced heat INFORMATION The sensors used to calculate the produced heat are calibrated automatically. ▪ Applicable for all models. ▪ The produced heat is calculated internally based on: ▪ The leaving and entering water temperature ▪ The flow rate ▪ The power consumption of the booster heater (if applicable) in the domestic hot water tank ▪ Setup and configuration: ▪ No additional equipment needed. ▪ Only in case a booster heater is present in the system, measure its capacity (resistance measurement) and set the capacity via the user interface. Example: If you measure a booster heater resistance of 17.1Ω, the capacity of the heater at 230  V is 3100 W. 5.5.2 Consumed energy You can use the following methods to determine the consumed energy: ▪ Calculating ▪ Measuring INFORMATION You cannot combine calculating the consumed energy (example: for backup heater) and measuring the consumed energy (example: for outdoor unit). If you do so, the energy data will be invalid. Calculating the consumed energy ▪ Only applicable for RHBH/X04+08 and RHVH/X04+08. ▪ The consumed energy is calculated internally based on: ▪ The actual power input of the outdoor unit ▪ The set capacity of the backup heater and booster heater ▪ The voltage ▪ Setup and configuration: To get accurate energy data, measure the capacity (resistance measurement) and set the capacity via the user interface for: ▪ The backup heater (step 1 and step 2) ▪ The booster heater Measuring the consumed energy ▪ Applicable for all models. ▪ Preferred method because of higher accuracy. ▪ Requires external power meters. ▪ Setup and configuration: When using electrical power meters, set the number of pulses/kWh for each power meter via the user interface. Consumed energy data for RHVH/X11+16 and RHBH/ X11+16 models will only be available if this setting is configured. INFORMATION When measuring the electrical power consumption, make sure ALL power input of the system is covered by the electrical power meters. 5.5.3 Normal kWh rate power supply General rule One power meter that covers the entire system is sufficient. Setup Connect the power meter to X5M/7 and X5M/8. Power meter type In case of… Use a… power meter ▪ Single-phase outdoor unit ▪ Backup heater supplied from a single-phase grid (i.e. the backup heater model is *3V or *9W connected to a single- phase grid) Single-phase

Installer reference guide 20 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 In case of… Use a… power meter In other cases (i.e. a three-phase outdoor unit and/or a *9W backup heater model connected to a three-phase grid) Three-phase Example Single-phase power meter Three-phase power meter b 0580 1 50 0 c c f e d g A B C a A Outdoor unit B Indoor unit C DHW tank a Electrical cabinet (L1/N) b Power meter (L1/N) c Fuse (L1/N) d Outdoor unit (L1/N) e Indoor unit (L1/N) f Backup heater (L1/N) g Booster heater (L1/N) b 0580 1 50 0 g f e h A B C c c d a  A Outdoor unit B Indoor unit C DHW tank a Electrical cabinet (L1/L2/L3/N) b Power meter (L1/L2/L3/N) c Fuse (L1/L2/L3/N) d Fuse (L1/N) e Outdoor unit (L1/L2/L3/N) f Indoor unit (L1/L2/L3/N) g Backup heater (L1/L2/L3/N) h Booster heater (L1/N) Exception ▪ You can use a second power meter if: ▪ The power range of one meter is insufficient. ▪ The electrical meter cannot easily be installed in the electrical cabinet. ▪ 230  V and 400  V three-phase grids are combined (very uncommon), because of technical limitations of power meters. ▪ Connection and setup: ▪ Connect the second power meter to X5M/9 and X5M/10. ▪ In the software the power consumption data of both meters is added so you do NOT have to set which meter covers which power consumption. You only need to set the number of pulses of each power meter. ▪ See "5.5.4  Preferential kWh rate power supply"  on page  20 for an example with two power meters. 5.5.4 Preferential kWh rate power supply General rule ▪ Power meter 1: Measures the outdoor unit. ▪ Power meter 2: Measures the rest (i.e. indoor unit, backup heater and optional booster heater). Setup ▪ Connect power meter 1 to X5M/7 and X5M/8. ▪ Connect power meter 2 to X5M/9 and X5M/10. Power meter types ▪ Power meter 1: Single- or three-phase power meter according to the power supply of the outdoor unit. ▪ Power meter 2: ▪ In case of a single-phase backup heater configuration, use a single-phase power meter. ▪ In other cases, use a three-phase power meter. Example Single-phase outdoor unit with a three-phase backup heater: e e f e i h g j A B C b a d  c 0580 1 50 0 0580 1 50 0 A Outdoor unit B Indoor unit C DHW tank a Electrical cabinet (L1/N): Preferential kWh rate power supply b Electrical cabinet (L1/L2/L3/N): Normal kWh rate power supply c Power meter (L1/N) d Power meter (L1/L2/L3/N) e Fuse (L1/N) f Fuse (L1/L2/L3/N) g Outdoor unit (L1/N) h Indoor unit (L1/N) i Backup heater (L1/L2/L3/N) j Booster heater (L1/N) 5.6 Setting up the power consumption control ▪ The power consumption control: ▪ Is only applicable for RHBH/X04+08 and RHVH/X04+08. ▪ Allows you to limit the power consumption of the entire system (sum of outdoor unit, indoor unit, backup heater and optional booster heater). ▪ Configuration: Set the power limitation level and how it has to be achieved via the user interface. ▪ The power limitation level can be expressed as: ▪ Maximum running current (in A) ▪ Maximum power input (in kW) ▪ The power limitation level can be activated: ▪ Permanently ▪ By digital inputs 5.6.1 Permanent power limitation Permanent power limitation is useful to assure a maximum power or current input of the system. In some countries, legislation limits the maximum power consumption for space heating and DHW production.

Installer reference guide 21 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Pi t DI a b Pi Power input t Time DI Digital input (power limitation level) a Power limitation active b Actual power input Setup and configuration ▪ No additional equipment needed. ▪ Set the power consumption control settings in [A.6.3.1] via the user interface (for the description of all settings, see "8 Configuration" on page 45): ▪ Select full time limitation mode ▪ Select the type of limitation (power in kW or current in A) ▪ Set the desired power limitation level NOTICE Mind the following guidelines when selecting the desired power limitation level: ▪ Set a minimum power consumption of ±3.6  kW to guarantee defrost operation. Otherwise, if defrosting is interrupted several times, the heat exchanger will freeze up. ▪ Set a minimum power consumption of ±3  kW to guarantee space heating and DHW production by allowing at least one electrical heater (backup heater step 1 or booster heater). 5.6.2 Power limitation activated by digital inputs Power limitation is also useful in combination with an energy management system. The power or current of the entire ROTEX system is limited dynamically by digital inputs (maximum four steps). Each power limitation level is set via the user interface by limiting one of the following: ▪ Current (in A) ▪ Power input (in kW) The energy management system (field supply) decides the activation of a certain power limitation level. Example: To limit the maximum power of the entire house (lighting, domestic appliances, space heating…). a b c A B C D 12345 A8P A Outdoor unit B Indoor unit C DHW tank D Energy management system a Power limitation activation (4 digital inputs) b Backup heater c Booster heater Pi t DI4 DI3 DI1 a b Pi Power input t Time DI Digital inputs (power limitation levels) a Power limitation active b Actual power input Setup ▪ Demand PCB (option EKRP1AHTA) needed. ▪ Maximum four digital inputs are used to activate the corresponding power limitation level: ▪ DI1 = weakest limitation (highest energy consumption) ▪ DI4 = strongest limitation (lowest energy consumption) ▪ For the specifications of the digital inputs, and for where to connect them, refer to the wiring diagram. Configuration Set the power consumption control settings in [A.6.3.1] via the user interface (for the description of all settings, see "8 Configuration" on page 45): ▪ Select activation by digital inputs. ▪ Select the type of limitation (power in kW or current in A). ▪ Set the desired power limitation level corresponding to each digital input. INFORMATION In case more than 1 digital input is closed (at the same time), the digital input priority is fixed: DI4 priority>…>DI1. 5.6.3 Power limitation process The outdoor unit has better efficiency than the electrical heaters. Therefore, the electrical heaters are limited and turned OFF first. The system limits power consumption in the following order: 1 Limits certain electrical heaters. If… has priority Then set the heater priority via the user interface to… Domestic hot water production Booster heater. Result: The backup heater will be turned OFF first. Space heating Backup heater. Result: The booster heater will be turned OFF first. 2 Turns OFF all electrical heaters. 3 Limits the outdoor unit. 4 Turns OFF the outdoor unit. Example If the configuration is as follows: ▪ Power limitation level does NOT allow operation of both booster heater and backup heater (step 1 and step 2). ▪ Heater priority = Booster heater. Then power consumption is limited as follows:

22 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Ph Ce a b c d e A B C Ph Produced heat Ce Consumed energy A Outdoor unit B Booster heater C Backup heater a Limited outdoor unit operation b Full outdoor unit operation c Booster heater turned ON d Backup heater step 1 turned ON e Backup heater step 2 turned ON 5.7 Setting up an external temperature sensor You can connect one external temperature sensor. It can measure the outdoor ambient temperature. ROTEX recommends to use an external temperature sensor in the following cases: Outdoor ambient temperature ▪ In the outdoor unit, the outdoor ambient temperature is measured. Therefore, the outdoor unit must be installed on a location: ▪ At the north side of the house or at the side of the house where the most heat emitters are located ▪ That is NOT exposed to direct sunlight ▪ If this is NOT possible, ROTEX recommends to connect a remote outdoor sensor (option EKRSCA1). ▪ Setup: For installation instructions, see the installation manual of the remote outdoor sensor. ▪ Configuration: Select outdoor sensor [A.2.2.B]. ▪ During suspend (see "8 Configuration" on page 45), the outdoor unit is turned down to reduce the standby energy losses. As a result, the outdoor ambient temperature is NOT read out. ▪ If the desired leaving water temperature is weather dependent, the full time outdoor temperature measurement is important. This is another reason to install the optional outdoor ambient temperature sensor. INFORMATION The external outdoor ambient sensor data (either averaged or instantaneous) is used in the weather-dependent control curves and in the automatic heating/cooling changeover logic. To protect the outdoor unit, the internal sensor of the outdoor unit is always used. 6 Preparation 6.1 Overview: Preparation This chapter describes what you have to do and know before going on-site. It contains information about: ▪ Preparing the installation site ▪ Preparing the refrigerant piping ▪ Preparing the water piping ▪ Preparing the electrical wiring 6.2 Preparing installation site Do NOT install the unit in places often used as work place. In case of construction works (e.g. grinding works) where a lot of dust is created, the unit must be covered. Choose the installation location with sufficient place for carrying the unit in and out of the site. 6.2.1 Installation site requirements of the outdoor unit INFORMATION Also read the following requirements: ▪ General installation site requirements. See the "General safety precautions" chapter. ▪ Refrigerant piping requirements (length, height difference). See further in this "Preparation" chapter. Mind the following spacing guidelines: ≤1200 >250 >250 >250 >350 >350 (mm) (mm) a b b a a Air outlet b Air inlet NOTICE ▪ Do NOT stack the units on each other. ▪ Do NOT hang the unit on a ceiling. Strong winds (≥18 km/h) blowing against the outdoor unit’s air outlet causes short circuit (suction of discharge air). This may result in: ▪ deterioration of the operational capacity; ▪ frequent frost acceleration in heating operation; ▪ disruption of operation due to decrease of low pressure or increase of high pressure; ▪ a broken fan (if a strong wind blows continuously on the fan, it may start rotating very fast, until it breaks). It is recommended to install a baffle plate when the air outlet is exposed to wind. It is recommended to install the outdoor unit with the air inlet facing the wall and NOT directly exposed to the wind. b a b c a Baffle plate b Prevailing wind direction c Air outlet

23 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Do NOT install the unit in the following places: ▪ Sound sensitive areas (e.g. near a bedroom), so that the operation noise will cause no trouble. ▪ In places where a mineral oil mist, spray or vapour may be present in the atmosphere. Plastic parts may deteriorate and fall off or cause water leakage. It is NOT recommended to install the unit in the following places because it may shorten the life of the unit: ▪ Where the voltage fluctuates a lot ▪ In vehicles or vessels ▪ Where acidic or alkaline vapour is present Seaside installation. Make sure the outdoor unit is NOT directly exposed to sea winds. This is to prevent corrosion caused by high levels of salt in the air, which might shorten the life of the unit. Install the outdoor unit away from direct sea winds. Example: Behind the building. b c a If the outdoor unit is exposed to direct sea winds, install a windbreaker. ▪ Height of windbreaker≥1.5×height of outdoor unit ▪ Mind the service space requirements when installing the windbreaker. a b c d c d a Sea wind b Building c Outdoor unit d Windbreaker The outdoor unit is designed for outdoor installation only, and for ambient temperatures ranging 10~43°C in cooling mode and – 25~25°C in heating mode. 6.2.2 Additional installation site requirements of the outdoor unit in cold climates Protect the outdoor unit against direct snowfall and take care that the outdoor unit is NEVER snowed up. a b c c d a Snow cover or shed b Pedestal c Prevailing wind direction d Air outlet ▪ In any case, provide at least 300 mm of free space below the unit. Additionally, make sure the unit is positioned at least 100  mm above the maximum expected level of snow. See "7.3 Mounting the outdoor unit" on page 29 for more details. In heavy snowfall areas it is very important to select an installation site where the snow will NOT affect the unit. If lateral snowfall is possible, make sure that the heat exchanger coil is NOT affected by the snow. If necessary, install a snow cover or shed and a pedestal. 6.2.3 Installation site requirements of the indoor unit INFORMATION Also read the precautions and requirements in the "General safety precautions" chapter. ▪ Mind the measurement guidelines: Maximum refrigerant piping length between indoor unit and outdoor unit 30 m Minimum refrigerant piping length between indoor unit and outdoor unit 3 m Maximum height difference between indoor unit and outdoor unit 20 m Maximum distance between the 3‑way valve and the indoor unit (for installations with domestic hot water tank) 3 m Maximum distance between the domestic hot water tank and the indoor unit (for installations with domestic hot water tank) 10 m ▪ Mind the following spacing installation guidelines:

24 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 ≥1150 200 200 10 10 500 (mm) Do NOT install the unit in places such as: ▪ In places where a mineral oil mist, spray or vapour may be present in the atmosphere. Plastic parts may deteriorate and fall off or cause water leakage. ▪ Sound sensitive areas (e.g. near a bedroom), so that the operation noise will cause no trouble. ▪ The foundation must be strong enough to bear the weight of the unit. Take the weight of the unit with a domestic hot water tank full of water into account. Make sure, in the event of a water leak, water cannot cause any damage to the installation space and surroundings. ▪ In places with high humidity (max. RH=85%), for example a bathroom. ▪ In places where frost is possible. Ambient temperature around the indoor unit should be >5°C. ▪ The indoor unit is designed for indoor installation only and for ambient temperatures ranging from 5~35°C. 6.3 Preparing refrigerant piping 6.3.1 Refrigerant piping requirements INFORMATION Also read the precautions and requirements in the "General safety precautions" chapter. ▪ Piping material: Phosphoric acid deoxidised seamless copper. ▪ Piping diameter: Liquid piping Ø6.4 mm (1/4") Gas piping Ø15.9 mm (5/8") ▪ Piping temper grade and thickness: Outer diameter (Ø) Temper grade Thickness (t)(a) 6.4 mm (1/4") Annealed (O) ≥0.8 mm t Ø 15.9 mm (5/8") Annealed (O) ≥1.0 mm (a) Depending on the applicable legislation and the unit's maximum working pressure (see "PS High" on the unit name plate), larger piping thickness might be required. 6.3.2 Refrigerant piping insulation ▪ Use polyethylene foam as insulation material: ▪ with a heat transfer rate between 0.041 and 0.052 W/mK (0.035 and 0.045 kcal/mh°C) ▪ with a heat resistance of at least 120°C ▪ Insulation thickness Pipe outer diameter (Øp) Insulation inner diameter (Øi) Insulation thickness (t) 6.4 mm (1/4") 8~10 mm 10 mm 15.9 mm (5/8") 16~20 mm 13 mm Øi Øi t Øp Øp If the temperature is higher than 30°C and the humidity is higher than RH 80%, the thickness of the insulation materials should be at least 20  mm to prevent condensation on the surface of the insulation. 6.4 Preparing water piping 6.4.1 Water circuit requirements INFORMATION Also read the precautions and requirements in the "General safety precautions" chapter. NOTICE In case of plastic pipes, make sure they are fully oxygen diffusion tight according to DIN  4726. The diffusion of oxygen into the piping can lead to excessive corrosion. ▪ Connecting piping – Legislation. Make all piping connections in accordance with the applicable legislation and the instructions in the "Installation" chapter, respecting the water inlet and outlet. ▪ Connecting piping – Force. Do NOT use excessive force when connecting the piping. Deformation of the piping can cause malfunctioning of the unit. ▪ Connecting piping – Tools. Only use appropriate tooling to handle brass, which is a soft material. If NOT, pipes will get damaged. ▪ Connecting piping – Air, moisture, dust. If air, moisture or dust gets into the circuit, problems may occur. To prevent this: ▪ Only use clean pipes ▪ Hold the pipe end downwards when removing burrs. ▪ Cover the pipe end when inserting it through a wall, to prevent dust and/or particles entering the pipe. ▪ Use a decent thread sealant to seal connections. ▪ Closed circuit. Use the indoor unit ONLY in a closed water system. Using the system in an open water system will lead to excessive corrosion. ▪ Glycol. For safety reasons, it is NOT allowed to add any kind of glycol to the water circuit. ▪ Piping length. It is recommended to avoid long runs of piping between the domestic hot water tank and the hot water end point (shower, bath,…) and to avoid dead ends. ▪ Piping diameter. Select the water piping diameter in relation to the required water flow and the available external static pressure of the pump. See "14 Technical data" on page 84 for the external static pressure curves of the indoor unit. ▪ Water flow. You can find the minimum required water flow for indoor unit operation in the following table. In all cases, this flow needs to be guaranteed. When the flow is lower, the indoor unit will stop operation and display error 7H. Minimum required flow rate during defrost/backup heater operation 04+08 models 12 l/min

25 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Minimum required flow rate during defrost/backup heater operation 11+16 models 15 l/min ▪ Field supply components – Water. Only use materials that are compatible with water used in the system and with the materials used in the indoor unit. ▪ Field supply components – Water pressure and temperature. Check that all components in the field piping can withstand the water pressure and water temperature. ▪ Water pressure. The maximum water pressure is 4 bar. Provide adequate safeguards in the water circuit to ensure that the maximum pressure is NOT exceeded. ▪ Water temperature. All installed piping and piping accessories (valve, connections,…) MUST withstand the following temperatures: INFORMATION The following illustration is an example and might NOT match your system layout. M FCU1 FCU2 FCU3 i M FHL1 FHL2 FHL3 j l k f d e c b a f g h i i i T 65°C 89°C a Outdoor unit b Indoor unit c Heat exchanger d Backup heater e Pump f Shut-off valve g Motorised 3-way valve (supplied with the domestic hot water tank) h Motorised 2-way valve (field supply) i Collector j Domestic hot water tank k Heat exchanger coil l Booster heater FCU1...3 Fan coil unit (optional) (field supply) FHL1...3 Floor heating loop (field supply) T Room thermostat (optional) (field supply) ▪ Drainage – Low points. Provide drain taps at all low points of the system in order to allow complete drainage of the water circuit. ▪ Drainage – Pressure relief valve. Provide a proper drain for the pressure relief valve to avoid water coming into contact with electrical parts. ▪ Air vents. Provide air vents at all high points of the system, which must also be easily accessible for servicing. An automatic air purge is provided in the indoor unit. Check that the air purge is NOT tightened too much, so that automatic release of air in the water circuit is possible. ▪ Zn-coated parts. Never use Zn-coated parts in the water circuit. Because the unit's internal water circuit uses copper piping, excessive corrosion may occur. ▪ Non-brass metallic piping. When using non-brass metallic piping, insulate the brass and non-brass properly so that they do NOT make contact with each other. This to prevent galvanic corrosion. ▪ Valve – Separating circuits. When using a 3-way valve in the water circuit make sure that the domestic hot water circuit and the floor heating circuit is fully separated. ▪ Valve – Change‑over time. When using a 2-way valve or a 3-way valve in the water circuit, the maximum change-over time of the valve must be 60 seconds. ▪ Filter. It is strongly recommended to install an additional filter on the heating water circuit. Especially to remove metallic particles from foul heating piping, it is recommended to use a magnetic or cyclone filter, which can remove small particles. Small particles may damage the unit and will NOT be removed by the standard filter of the heat pump system. ▪ Domestic hot water tank – Capacity. To avoid stagnation of water, it is important that the storage capacity of the domestic hot water tank meets the daily consumption of domestic hot water. ▪ Domestic hot water tank – After installation. Immediately after installation, the domestic hot water tank must be flushed with fresh water. This procedure must be repeated at least once a day the first 5 consecutive days after installation. ▪ Domestic hot water tank – Standstills. In cases where during longer periods of time there is no consumption of hot water, the equipment MUST be flushed with fresh water before usage. ▪ Domestic hot water tank – Disinfection. For the disinfection function of the domestic hot water tank, see "8.3.2 Domestic hot water control: advanced" on page 60. ▪ Thermostatic mixing valves. In accordance with the applicable legislation, it may be necessary to install thermostatic mixing valves. ▪ Hygienic measures. The installation must be in compliance with the applicable legislation and may require additional hygienic installation measures. ▪ Recirculation pump. In accordance with the applicable legislation, it may be required to connect a recirculation pump in between the hot water end point and the recirculation connection of the domestic hot water tank. c d a b a Recirculation connection b Hot water connection c Shower d Recirculation pump 6.4.2 Formula to calculate the expansion vessel pre-pressure The pre-pressure (Pg) of the vessel depends on the installation height difference (H): Pg=0.3+(H/10) (bar) 6.4.3 To check the water volume and flow rate The indoor unit has an expansion vessel of 10 litre with a factory-set pre-pressure of 1 bar. To make sure that the unit operates properly: ▪ You must check the minimum and maximum water volume.

26 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 ▪ You might need to adjust the pre-pressure of the expansion vessel. Minimum water volume Check that the total water volume in the installation is minimum 10 litre, the internal water volume of the indoor unit NOT included. INFORMATION In critical processes, or in rooms with a high heat load, extra water might be required. NOTICE When circulation in each space heating/cooling loop is controlled by remotely controlled valves, it is important that the minimum water volume is guaranteed, even if all of the valves are closed. FHL1 FHL2 FHL3 M1 T1 M2 T2 M3 T3 f d b c a f g h e a Outdoor unit b Indoor unit c Heat exchanger d Backup heater e Pump f Shut-off valve g Collector (field supply) h By-pass valve (field supply) FHL1...3 Floor heating loop (field supply) T1...3 Individual room thermostat (optional) M1...3 Individual motorised valve to control loop FHL1...3 (field supply) Maximum water volume Use the following graph to determine the maximum water volume for the calculated pre-pressure. 0.3 0.5 1 1.5 2 2.5 100 50 0 10 150 200 250 300 350 400 450 a b a Pre-pressure (bar) b Maximum water volume (l) Example: Maximum water volume and expansion vessel pre- pressure Installation height difference(a) Water volume ≤280 l >280 l ≤7 m No pre-pressure adjustment is required. Do the following: ▪ Decrease the pre- pressure according to the required installation height difference. The pre-pressure should decrease by 0.1 bar for each metre below 7 m. ▪ Check if the water volume does NOT exceed the maximum allowed water volume. >7 m Do the following: ▪ Increase the pre- pressure according to the required installation height difference. The pre- pressure should increase by 0.1 bar for each metre above 7 m. ▪ Check if the water volume does NOT exceed the maximum allowed water volume. The expansion vessel of the indoor unit is too small for the installation. In this case, it is recommended to install an extra vessel outside the unit. (a) This is the height difference (m) between the highest point of the water circuit and the indoor unit. If the indoor unit is at the highest point of the installation, the installation height is 0 m. Minimum flow rate Check that the minimum flow rate (required during defrost/backup heater operation) in the installation is guaranteed in all conditions. NOTICE When circulation in each or certain space heating loops is controlled by remotely controlled valves, it is important that the minimum flow rate is guaranteed, even if all valves are closed. In case the minimum flow rate cannot be reached, a flow error 7H will be generated (no heating/operation). Minimum required flow rate during defrost/backup heater operation 04+08 models 12 l/min 11+16 models 15 l/min See the recommended procedure as described in "9.4  Checklist during commissioning" on page 73. 6.4.4 Changing the pre-pressure of the expansion vessel NOTICE Only a licensed installer may adjust the pre-pressure of the expansion vessel. When changing the default pre-pressure of the expansion vessel (1 bar) is required, take following guidelines into account: ▪ Only use dry nitrogen to set the expansion vessel pre-pressure. ▪ Inappropriate setting of the expansion vessel pre-pressure will lead to malfunction of the system. Changing the pre-pressure of the expansion vessel should be done by releasing or increasing nitrogen pressure through the Schrader valve of the expansion vessel.

27 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 a a Schrader valve 6.4.5 To check the water volume: Examples Example 1 The indoor unit is installed 5 m below the highest point in the water circuit. The total water volume in the water circuit is 100 l. No actions or adjustments are required. Example 2 The indoor unit is installed at the highest point in the water circuit. The total water volume in the water circuit is 350 l. Actions: ▪ Because the total water volume (350 l) is more than the default water volume (280 l), the pre-pressure must be decreased. ▪ The required pre-pressure is: Pg = (0.3+(H/10)) bar = (0.3+(0/10)) bar=0.3 bar. ▪ The corresponding maximum water volume at 0.3  bar is 410  l. (See the graph in the chapter above). ▪ Because 350  l is lower than 410  l, the expansion vessel is appropriate for the installation. 6.5 Preparing electrical wiring 6.5.1 About preparing electrical wiring INFORMATION Also read the precautions and requirements in the "General safety precautions" chapter. WARNING ▪ If the power supply has a missing or wrong N-phase, equipment might break down. ▪ Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Incomplete earthing may cause electrical shock. ▪ Install the required fuses or circuit breakers. ▪ Secure the electrical wiring with cable ties so that the cables do NOT come in contact with sharp edges or piping, particularly on the high-pressure side. ▪ Do NOT use taped wires, stranded conductor wires, extension cords, or connections from a star system. They can cause overheating, electrical shock or fire. ▪ Do NOT install a phase advancing capacitor, because this unit is equipped with an inverter. A phase advancing capacitor will reduce performance and may cause accidents. WARNING ▪ All wiring must be performed by an authorized electrician and must comply with the applicable legislation. ▪ Make electrical connections to the fixed wiring. ▪ All components procured on the site and all electrical construction must comply with the applicable legislation. WARNING The backup heater MUST have a dedicated power supply and MUST be protected by the safety devices required by the applicable legislation. WARNING ALWAYS use multicore cable for power supply cables. 6.5.2 About preferential kWh rate power supply Electricity companies throughout the world work hard to provide reliable electric service at competitive prices and are often authorized to bill clients at benefit rates. E.g. time-of-use rates, seasonal rates, Wärmepumpentarif in Germany and Austria, ... This equipment allows for connection to such preferential kWh rate power supply delivery systems. Consult with the electricity company acting as provider at the site where this equipment is to be installed to know whether it is appropriate to connect the equipment in one of the preferential kWh rate power supply delivery systems available, if any. When the equipment is connected to such preferential kWh rate power supply, the electricity company is allowed to: ▪ interrupt power supply to the equipment for certain periods of time; ▪ demand that the equipment only consumes a limited amount of electricity during certain periods of time. The indoor unit is designed to receive an input signal by which the unit switches into forced off mode. At that moment, the outdoor unit compressor will not operate. Whether the power supply is interrupted or not, the wiring to the unit is different.

28 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 6.5.3 Overview of electrical connections except external actuators Normal power supply Preferential kWh rate power supply Power supply is NOT interrupted Power supply is interrupted 1 0580 1 50 0 2 a 3 1 4 0580 1 50 0 2 b 3 During preferential kWh rate power supply activation, power supply is NOT interrupted. The outdoor unit is turned off by the control. Remark: The electricity company must always allow the power consumption of the indoor unit. 5 3 a b 1 4 0580 1 50 0 0580 1 50 0 2 During preferential kWh rate power supply activation, power supply is interrupted immediately or after some time by the electricity company. In this case, the indoor unit must be powered by a separate normal power supply. a Normal power supply b Preferential kWh rate power supply 1 Power supply for outdoor unit 2 Power supply and interconnection cable to indoor unit 3 Power supply for backup heater 4 Preferential kWh rate power supply (voltage free contact) 5 Normal kWh rate power supply (to power the indoor unit PCB in the event of power supply interruption of the preferential kWh rate power supply) 6.5.4 Overview of electrical connections for external and internal actuators The following illustration shows the required field wiring. INFORMATION The following illustration is an example and might NOT match your system layout. M M 6 7 c 15 20 d e 8 10 a 9 18 12 21 22 b 19 14 13 16 17 a Single power supply for outdoor unit, backup heater and booster heater b Backup heater c Indoor unit d Domestic hot water tank e Booster heater Item Description Wires Maximum running current Outdoor unit and indoor unit power supply 1 Power supply for outdoor unit 2+GND or 3+GND (a) 2 Power supply and interconnection cable to indoor unit 3 (c) 3 Power supply for backup heater See table below. — 4 Preferential kWh rate power supply (voltage free contact) 2 (e) 5 Normal kWh rate power supply 2 6.3 A User interface 6 User interface 2 (f) Optional equipment 7 3‑way valve 3 100 mA(b) 8 Power supply for booster heater and thermal protection (from indoor unit) 4+GND (c) 9 Power supply for booster heater (to indoor unit) 2+GND 13 A 10 Domestic hot water tank thermistor 2 (d) 11 Power supply for bottom plate heater 2 (b) 12 Room thermostat 3 or 4 100 mA(b) 13 Outdoor ambient temperature sensor 2 (b) 14 Heat pump convector 4 100 mA(b) Field supplied components 15 Shut-off valve 2 100 mA(b) 16 Electricity meter 2 (per meter) (b) 17 Domestic hot water pump 2 (b) 18 Alarm output 2 (b) 19 Changeover to external heat source control 2 (b) 20 Space cool/heat operation control 2 (b) 21 Power consumption digital inputs 2 (per input signal) (b) 22 Safety thermostat 2 (e) (a) Refer to name plate on outdoor unit. (b) Minimum cable section 0.75 mm². (c) Cable section 2.5 mm². (d) The thermistor and connection wire (12 m) are delivered with the domestic hot water tank. (e) Cable section 0.75 mm² till 1.25 mm²; maximum length: 50 m. Voltage-free contact shall ensure the minimum applicable load of 15 V DC, 10 mA. (f) Cable section 0.75 mm² till 1.25 mm²; maximum length: 500 m. Applicable for both single user interface and dual user interface connection. NOTICE More technical specifications of the different connections are indicated on the inside of the indoor unit.

29 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Backup heater type Power supply Required number of conductors *3V 1× 230 V 2+GND *9W 1× 230 V 2+GND + 2 bridges 3× 230 V 3+GND + 1 bridge 3× 400 V 4+GND 7 Installation 7.1 Overview: Installation This chapter describes what you have to do and know on-site to install the system. Typical workflow Installation typically consists of the following stages: 1 Mounting the outdoor unit. 2 Mounting the indoor unit. 3 Connecting the refrigerant piping. 4 Checking the refrigerant piping. 5 Charging refrigerant. 6 Connecting the water piping. 7 Connecting the electrical wiring. 8 Finishing the outdoor installation. 9 Finishing the indoor installation. INFORMATION Depending on the units and/or the installation conditions, it might be necessary to connect electrical wiring before you can charge refrigerant. 7.2 Opening the units 7.2.1 About opening the units At certain times, you have to open the unit. Example: ▪ When connecting the refrigerant piping ▪ When connecting the electrical wiring ▪ When maintaining or servicing the unit DANGER: RISK OF ELECTROCUTION Do NOT leave the unit unattended when the service cover is removed. 7.2.2 To open the outdoor unit DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING 1× 1 2 2 7.2.3 To open the indoor unit 1 Loosen and remove the 2 screws that fix the front panel. 2× 2 Tilt the front panel towards you and remove the front panel. 7.2.4 To open the switch box cover of the indoor unit 4× 7.3 Mounting the outdoor unit 7.3.1 About mounting the outdoor unit When You have to mount the outdoor and indoor unit before you can connect the refrigerant and water piping. Typical workflow Mounting the outdoor unit typically consists of the following stages: 1 Providing the installation structure. 2 Installing the outdoor unit. 3 Providing drainage. 4 Protecting the unit against snow and wind by installing a snow cover and baffle plates. See "Preparing installation site" in "6 Preparation" on page 22. 7.3.2 Precautions when mounting the outdoor unit INFORMATION Also read the precautions and requirements in the following chapters: ▪ General safety precautions ▪ Preparation

30 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 7.3.3 To provide the installation structure Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise. Fix the unit securely by means of foundation bolts in accordance with the foundation drawing. If the unit is installed directly on the floor, prepare 4 sets of M8 or M10 anchor bolts, nuts and washers (field supply) as follows: INFORMATION The maximum height of the upper protruding part of the bolts is 15 mm. 283 580 <100 (mm) <100 >300 In any case, provide at least 300 mm of free space below the unit. Additionally, make sure the unit is positioned at least 100 mm above the maximum expected level of snow. In this case, it is recommended to construct a pedestal, and on this pedestal install the EKFT008CA option kit. 283 580 <150 <150 (mm) >300 100 a b a Maximum snowfall height b EKFT008CA option kit If the unit is installed on brackets to the wall, it is recommended to use the EKFT008CA option kit and to install the unit as follows: >250 >300 >250 (mm) a b a Maximum snowfall height b EKFT008CA option kit 7.3.4 To install the outdoor unit CAUTION Do NOT remove the protective cardboard before the unit is installed properly.

31 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 1 Lift the outdoor unit as described in "3.2.2  To remove the accessories from the outdoor unit" on page 7. 2 Install the outdoor unit as follows: 2× 2 a a 1 a Air outlet NOTICE The pedestal MUST be aligned with the backside of the U‑beam. 3 Remove the protective cardboard and instruction sheet. b a a Protective cardboard b Instruction sheet 7.3.5 To provide drainage ▪ Avoid installation places where water leaking from the unit due to a blocked drain pan can cause damage to the location. ▪ Make sure that condensation water can be evacuated properly. ▪ Install the unit on a base to make sure that there is a proper drainage in order to avoid ice accumulation. ▪ Prepare a water drainage channel around the foundation to drain waste water surrounding the unit. ▪ Avoid drain water flowing over the footpath, so that it does not become slippery in case of ambient freezing temperatures. ▪ If you install the unit on a frame, install a waterproof plate within 150  mm of the bottom side of the unit in order to prevent the invasion of water in the unit and to avoid the drain water dripping (see the following illustration). NOTICE If the drain holes of the outdoor unit are blocked up, provide space of at least 300 mm below the outdoor unit. An additional drain pan kit (EKDP008CA) can be used to gather the drain water. The drain pan kit consists of: b a a Drain pan b U-beams 283 mm 580 mm 7.3.6 To prevent the outdoor unit from falling over In case the unit is installed in places where strong wind can tilt the unit, take following measure: 1 Prepare 2 cables as indicated in the following illustration (field supply). 2 Place the 2 cables over the outdoor unit. 3 Insert a rubber sheet between the cables and the outdoor unit to prevent the cable from scratching the paint (field supply). 4 Attach the cable’s ends. Tighten those ends.

32 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 7.4 Mounting the indoor unit 7.4.1 About mounting the indoor unit When You have to mount the outdoor and indoor unit before you can connect the refrigerant and water piping. Typical workflow Mounting the indoor unit typically consists of the following stages: 1 Installing the indoor unit. 2 Installing the drain pan kit (optional). 7.4.2 Precautions when mounting the indoor unit INFORMATION Also read the precautions and requirements in the following chapters: ▪ General safety precautions ▪ Preparation 7.4.3 To install the indoor unit CAUTION Do NOT grasp the piping to lift the indoor unit. 1 Lift the unit from the package. 60kg 2 Remove the 4 screws from the bottom of the unit. Unhook and remove the side plates. 1 2 5× 3 3 3 Put the installation pattern (see packing) on the wall and follow the steps as shown below. 2× 2 1 3 4 4 Lift the unit. 1 2 5 Tilt the top of the unit against the wall at the position of the 2 inserted screws. 6 Hook the unit against the wall. 2 1 2× 3 2× 7 Assemble the unit.

33 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 1 2 1 2 2 2 3 5× 7.4.4 To install the drain pan kit If a drain pan kit (EKHBDPCA2) is required, install it before connecting the refrigerant and water pipes and the electrical wiring. To install, see the installation manual of the drain pan kit. 7.5 Connecting the refrigerant piping 7.5.1 About connecting the refrigerant piping Before connecting the refrigerant piping Make sure the outdoor and indoor unit are mounted. Typical workflow Connecting the refrigerant piping involves: ▪ Connecting the refrigerant piping to the outdoor unit ▪ Connecting the refrigerant piping to the indoor unit ▪ Insulating the refrigerant piping ▪ Keeping in mind the guidelines for: ▪ Pipe bending ▪ Flaring pipe ends ▪ Brazing ▪ Using the stop valves 7.5.2 Precautions when connecting the refrigerant piping INFORMATION Also read the precautions and requirements in the following chapters: ▪ General safety precautions ▪ Preparation DANGER: RISK OF BURNING CAUTION ▪ Do NOT use mineral oil on flared part. ▪ Do NOT reuse piping from previous installations. ▪ NEVER install a drier to this R410A unit to guarantee its lifetime. The drying material may dissolve and damage the system. NOTICE Take the following precautions on refrigerant piping into account: ▪ Avoid anything but the designated refrigerant to get mixed into the refrigerant cycle (e.g. air). ▪ Only use R410A when adding refrigerant. ▪ Only use installation tools (e.g. manifold gauge set) that are exclusively used for R410A installations to withstand the pressure and to prevent foreign materials (e.g. mineral oils and moisture) from mixing into the system. ▪ Install the piping so that the flare is NOT subjected to mechanical stress ▪ Protect the piping as described in the following table to prevent dirt, liquid or dust from entering the piping. ▪ Use caution when passing copper tubes through walls (see figure below). Unit Installation period Protection method Outdoor unit >1 month Pinch the pipe <1 month Pinch or tape the pipe Indoor unit Regardless of the period INFORMATION Do NOT open the refrigerant stop valve before checking the refrigerant piping. When you need to charge additional refrigerant it is recommended to open the refrigerant stop valve after charging. 7.5.3 Guidelines when connecting the refrigerant piping Take the following guidelines into account when connecting pipes: ▪ Coat the flare inner surface with ether oil or ester oil when connecting a flare nut. Tighten 3 or 4 turns by hand, before tightening firmly.

34 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 ▪ Always use 2 wrenches together when loosening a flare nut. ▪ Always use a spanner and torque wrench together to tighten the flare nut when connecting the piping. This to prevent nut cracking and leaks. a b c d a Torque wrench b Spanner c Piping union d Flare nut Piping size (mm) Tightening torque (N•m) Flare dimensions (A) (mm) Flare shape (mm) Ø6.4 15~17 8.7~9.1 R=0.4~0.8 45°±2 90°±2 A Ø15.9 63~75 19.3~19.7 7.5.4 Pipe bending guidelines Use a pipe bender for bending. All pipe bends should be as gentle as possible (bending radius should be 30~40 mm or larger). 7.5.5 To flare the pipe end CAUTION ▪ Incomplete flaring may cause refrigerant gas leakage. ▪ Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage. ▪ Use flare nuts that are included with the unit. Using different flare nuts may cause refrigerant gas leakage. 1 Cut the pipe end with a pipe cutter. 2 Remove burrs with the cut surface facing down so that the chips do not enter the pipe. a b a Cut exactly at right angles. b Remove burrs. 3 Remove the flare nut from the stop valve and put the flare nut on the pipe. 4 Flare the pipe. Set exactly at the position as shown in the following illustration. A Flare tool for R410A (clutch type) Conventional flare tool Clutch type (Ridgid-type) Wing nut type (Imperial-type) A 0~0.5 mm 1.0~1.5 mm 1.5~2.0 mm 5 Check that the flaring is properly made. a b c a Flare’s inner surface must be flawless. b The pipe end must be evenly flared in a perfect circle. c Make sure the flare nut is fitted. 7.5.6 To braze the pipe end The indoor unit and outdoor unit have flare connections. Connect both ends without brazing. If brazing should be needed, take the following into account: ▪ When brazing, blow through with nitrogen to prevent creation of large quantities of oxidised film on the inside of the piping. This film adversely affects valves and compressors in the refrigerating system and prevents proper operation. ▪ Set the nitrogen pressure to 20 kPa (0.2 bar) (just enough so it can be felt on the skin) with a pressure-reducing valve. a b c d e f f a Refrigerant piping b Part to be brazed c Taping d Manual valve e Pressure-reducing valve f Nitrogen ▪ Do NOT use anti-oxidants when brazing pipe joints. Residue can clog pipes and break equipment. ▪ Do NOT use flux when brazing copper-to-copper refrigerant piping. Use phosphor copper brazing filler alloy (BCuP), which does not require flux. Flux has an extremely harmful influence on refrigerant piping systems. For instance, if chlorine based flux is used, it will cause pipe corrosion or, in particular, if the flux contains fluorine, it will deteriorate the refrigerant oil. 7.5.7 Using the stop valve and service port To handle the stop valve Take the following guidelines into account: ▪ The stop valves are factory closed. ▪ The following illustration shows each part required in handling the valve. c d a b a Service port and service port cap b Valve stem c Field piping connection d Stem cap ▪ Keep both stop valves open during operation. ▪ Do NOT apply excessive force to the valve stem. Doing so may break the valve body. ▪ Always make sure to secure the stop valve with a spanner, then loosen or tighten the flare nut with a torque wrench. Do NOT place the spanner on the stem cap, as this could cause a refrigerant leak.

35 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 a b a Spanner b Torque wrench ▪ When it is expected that the operating pressure will be low (e.g. when cooling will be performed while the outside air temperature is low), sufficiently seal the flare nut in the stop valve on the gas line with silicon sealant to prevent freezing. Silicon sealant, make sure there is no gap. To open/close the stop valve 1 Remove the valve cover. 2 Insert a hexagon wrench (liquid side: 4 mm, gas side: 6 mm) into the valve stem and turn the valve stem: Counterclockwise to open. Clockwise to close. 3 When the valve stem cannot be turned any further, stop turning. The valve is now opened/closed. To handle the stem cap ▪ The stem cap is sealed where indicated with the arrow. Do NOT damage it. ▪ After handling the stop valve, tighten the stem cap, and check for refrigerant leaks. Item Tightening torque (N∙m) Stem cap, liquid side 13.5~16.5 Stem cap, gas side 22.5~27.5 To handle the service cap ▪ Always use a charge hose equipped with a valve depressor pin, since the service port is a Schrader type valve. ▪ After handling the service port, tighten the service port cap, and check for refrigerant leaks. Item Tightening torque (N∙m) Service port cap 11.5~13.9 7.5.8 To connect the refrigerant piping to the outdoor unit 1 Connect the liquid refrigerant connection from the indoor unit to the liquid stop valve of the outdoor unit. a b c a Liquid stop valve b Gas stop valve c Service port 2 Connect the gas refrigerant connection from the indoor unit to the refrigerant stop valve of the outdoor unit. NOTICE It is recommended that the refrigerant piping between indoor and outdoor unit is installed in a ducting or the refrigerant piping is wrapped with finishing tape. 7.5.9 To connect the refrigerant piping to the indoor unit 1 Connect the liquid stop valve from the outdoor unit to the refrigerant liquid connection of the indoor unit. a b a Refrigerant liquid connection b Refrigerant gas connection 2 Connect the gas stop valve from the outdoor unit to the refrigerant gas connection of the indoor unit. NOTICE It is recommended that the refrigerant piping between indoor and outdoor unit is installed in a ducting or the refrigerant piping is wrapped with finishing tape. 7.6 Checking the refrigerant piping 7.6.1 About checking the refrigerant piping The outdoor unit's internal refrigerant piping has been factory tested for leaks. You only have to check the outdoor unit's external refrigerant piping. Before checking the refrigerant piping Make sure the refrigerant piping is connected between the outdoor unit and the indoor unit.

36 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Typical workflow Checking the refrigerant piping typically consists of the following stages: 1 Checking for leaks in the refrigerant piping. 2 Performing vacuum drying to remove all moisture, air or nitrogen from the refrigerant piping. If there is a possibility of moisture being present in the refrigerant piping (for example, water may have entered the piping), first carry out the vacuum drying procedure below until all moisture has been removed. 7.6.2 Precautions when checking the refrigerant piping INFORMATION Also read the precautions and requirements in the following chapters: ▪ General safety precautions ▪ Preparation NOTICE Use a 2-stage vacuum pump with a non-return valve that can evacuate to a gauge pressure of −⁠100.7  kPa (−⁠1.007  bar)(5  Torr absolute). Make sure the pump oil does not flow oppositely into the system while the pump is not working. NOTICE Use this vacuum pump for R410A exclusively. Using the same pump for other refrigerants may damage the pump and the unit. NOTICE ▪ Connect the vacuum pump to the service port of the gas stop valve. ▪ Make sure that the gas stop valve and liquid stop valve are firmly closed before performing the leak test or vacuum drying. 7.6.3 To check for leaks NOTICE Do NOT exceed the unit's maximum working pressure (see "PS High" on the unit name plate). NOTICE Make sure to use a recommended bubble test solution from your wholesaler. Do not use soap water, which may cause cracking of flare nuts (soap water may contain salt, which absorbs moisture that will freeze when the piping gets cold), and/or lead to corrosion of flared joints (soap water may contain ammonia which causes a corrosive effect between the brass flare nut and the copper flare). 1 Charge the system with nitrogen gas up to a gauge pressure of at least 200  kPa (2  bar). It is recommended to pressurize to 3000 kPa (30 bar) in order to detect small leaks. 2 Check for leaks by applying the bubble test solution to all connections. 3 Discharge all nitrogen gas. 7.6.4 To perform vacuum drying Connect the vacuum pump and manifold as follows: a d j b f e c g h i h a Pressure meter b Gauge manifold c Low-pressure valve (Lo) d High-pressure valve (Hi) e Charging hoses f Vacuum pump g Service port h Valve lids i Gas stop valve j Liquid stop valve 1 Vacuum the system until the pressure on the manifold indicates −0.1 MPa (−1 bar). 2 Leave as is for 4-5 minutes and check the pressure: If the pressure… Then… Does not change There is no moisture in the system. This procedure is finished. Increases There is moisture in the system. Go to the next step. 3 Evacuate for at least 2 hours to a pressure on the manifold of −0.1 MPa (−1 bar). 4 After turning OFF the pump, check the pressure for at least 1 hour. 5 If you do NOT reach the target vacuum or cannot maintain the vacuum for 1 hour, do the following: ▪ Check for leaks again. ▪ Perform vacuum drying again. NOTICE Be sure to open the gas stop valve after piping installation and vacuuming. Running the system with the valve closed, the compressor may break down. INFORMATION After opening the stop valve, it is possible that the pressure in the refrigerant piping does NOT increase. This might be caused by e.g. the closed state of the expansion valve in the outdoor unit circuit, but does NOT present any problem for correct operation of the unit. 7.7 Charging refrigerant 7.7.1 About charging refrigerant The outdoor unit is factory charged with refrigerant, but in some cases the following might be necessary: What When Charging additional refrigerant When the total liquid piping length is more than specified (see later). Completely recharging refrigerant Example: ▪ When relocating the system. ▪ After a leak.

37 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Charging additional refrigerant Before charging additional refrigerant, make sure the outdoor unit's external refrigerant piping is checked (leak test, vacuum drying). INFORMATION Depending on the units and/or the installation conditions, it might be necessary to connect electrical wiring before you can charge refrigerant. Typical workflow – Charging additional refrigerant typically consists of the following stages: 1 Determining if and how much you have to charge additionally. 2 If necessary, charging additional refrigerant. 3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of the outdoor unit. Completely recharging refrigerant Before completely recharging refrigerant, make sure the following is done: 1 All refrigerant is recovered from the system. 2 The outdoor unit's external refrigerant piping is checked (leak test, vacuum drying). 3 Vacuum drying on the outdoor unit's internal refrigerant piping is performed. NOTICE Before completely recharging, perform vacuum drying on the outdoor unit's internal refrigerant piping as well. Typical workflow – Completely recharging refrigerant typically consists of the following stages: 1 Determining how much refrigerant to charge. 2 Charging refrigerant. 3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of the outdoor unit. 7.7.2 Precautions when charging refrigerant INFORMATION Also read the precautions and requirements in the following chapters: ▪ General safety precautions ▪ Preparation 7.7.3 To determine the additional refrigerant amount If the total liquid piping length is… Then… ≤10 m Do NOT add additional refrigerant. >10 m R=(total length (m) of liquid piping⁠–⁠10 m)×0.020 R=Additional charge (kg)(rounded in units of 0.1 kg) INFORMATION Piping length is the one way length of liquid piping. 7.7.4 To determine the complete recharge amount INFORMATION If a complete recharge is necessary, the total refrigerant charge is: the factory refrigerant charge (see unit name plate) + the determined additional amount. 7.7.5 To charge additional refrigerant WARNING ▪ Only use R410A as refrigerant. Other substances may cause explosions and accidents. ▪ R410A contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 2087.5. Do NOT vent these gases into the atmosphere. ▪ When charging refrigerant, always use protective gloves and safety glasses. CAUTION To avoid compressor breakdown, do NOT charge more than the specified amount of refrigerant. Prerequisite: Before charging refrigerant, make sure the refrigerant piping is connected and checked (leak test and vacuum drying). 1 Connect the refrigerant cylinder to the service port. 2 Charge the additional refrigerant amount. 3 Open the gas stop valve. If pump down is needed in case of dismantling or relocating the system, see "13.2 To pump down" on page 83 for more details. 7.7.6 To fix the fluorinated greenhouse gases label 1 Fill in the label as follows: b Contains fluorinated greenhouse gases 2 1 1 1 2 2 kg tCO2eq GWP × kg 1000 = = + kg = kg = GWP: XXX RXXX a f c d e a If a multilingual fluorinated greenhouse gases label is delivered with the unit (see accessories), peel off the applicable language and stick it on top of a. b Factory refrigerant charge: see unit name plate c Additional refrigerant amount charged d Total refrigerant charge e Greenhouse gas emissions of the total refrigerant charge expressed as tonnes CO2-equivalent f GWP = Global warming potential NOTICE In Europe, the greenhouse gas emissions of the total refrigerant charge in the system (expressed as tonnes CO2-equivalent) is used to determine the maintenance intervals. Follow the applicable legislation. Formula to calculate the greenhouse gas emissions: GWP value of the refrigerant × Total refrigerant charge [in kg] / 1000 2 Fix the label on the inside of the outdoor unit near the gas and liquid stop valves.

38 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 7.8 Connecting the water piping 7.8.1 About connecting the water piping Before connecting the water piping Make sure the outdoor and indoor unit are mounted. Typical workflow Connecting the water piping typically consists of the following stages: 1 Connecting the water piping to the indoor unit. 2 Filling the water circuit. 3 Filling the domestic hot water tank. 4 Insulating the water piping. 7.8.2 Precautions when connecting the water piping INFORMATION Also read the precautions and requirements in the following chapters: ▪ General safety precautions ▪ Preparation 7.8.3 To connect the water piping NOTICE Do NOT use excessive force when connecting the piping. Deformation of the piping can cause malfunctioning of the unit. To facilitate service and maintenance, 2 shut-off valves are provided. Mount the valves on the water inlet and on the water outlet. Mind their position: the integrated drain valves will only drain the side of the circuit on which they are located. To be able to only drain the unit, make sure the drain valves are positioned between the shut‑off valves and the unit. 1 Install the shut-off valves on the water pipes. a b a Water inlet b Water outlet NOTICE To avoid damage to the surroundings in case of water leakage, it is recommended to close the cold water inlet shut‑off valves during periods of absence. 2 Screw the indoor unit nuts on the shut-off valves. 3 Connect the field piping on the shut-off valves. 4 In case of connection with the optional domestic hot water tank, see the installation manual of the domestic hot water tank. NOTICE Install air purge valves at all local high points. NOTICE ▪ A drain device and pressure relief device should be installed on the cold water inlet connection of the domestic hot water cylinder. ▪ To avoid back siphonage, it is recommended to install a non-return valve on the water inlet of the domestic hot water tank in accordance with the applicable legislation. ▪ It is recommended to install a pressure reducing valve on the cold water inlet in accordance with the applicable legislation. ▪ An expansion vessel should be installed on the cold water inlet in accordance with the applicable legislation. ▪ It is recommended to install the pressure relief valve on a higher position than the top of the domestic hot water tank. Heating of the domestic hot water tank causes water to expand and without pressure relief valve the water pressure inside the tank can rise above the tank design pressure. Also the field installation (piping, tapping points, etc.) connected to the tank is subjected to this high pressure. To prevent this, a pressure relieve valve needs to be installed. The overpressure prevention depends on the correct operation of the field installed pressure relief valve. If this is NOT working correctly, overpressure will deform the tank and water leakage may occur. To confirm good operation, regular maintenance is required. 7.8.4 To fill the water circuit 1 Connect the water supply hose to the drain and fill valve. 2 Open the drain and fill valve. 3 Make sure that the automatic air purge valve is open (at least 2 turns). 4 Fill the circuit with water until the manometer indicates a pressure of ±2.0 bar. 5 Purge as much air as possible from the water circuit. For instructions, see "9 Commissioning" on page 73. 6 Close the drain and fill valve. 7 Disconnect the water supply hose from the drain and fill valve. NOTICE The water pressure indicated on the manometer will vary depending on the water temperature (higher pressure at higher water temperature). However, at all times water pressure shall remain above 1 bar to avoid air entering the circuit. 7.8.5 To fill the domestic hot water tank For installation instructions, see the installation manual of the domestic hot water tank.

39 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 7.8.6 To insulate the water piping The piping in the complete water circuit MUST be insulated to prevent condensation during cooling operation and reduction of the heating and cooling capacity. If the temperature is higher than 30°C and the humidity is higher than RH 80%, the thickness of the insulation materials should be at least 20  mm to prevent condensation on the surface of the insulation. 7.9 Connecting the electrical wiring 7.9.1 About connecting the electrical wiring Before connecting the electrical wiring Make sure: ▪ The refrigerant piping is connected and checked ▪ The water piping is connected Typical workflow Connecting the electrical wiring typically consists of the following stages: 1 Making sure the power supply system complies with the electrical specifications of the heat pump. 2 Connecting the electrical wiring to the outdoor unit. 3 Connecting the electrical wiring to the indoor unit. 4 Connecting the main power supply. 5 Connecting the backup heater power supply. 6 Connecting the user interface. 7 Connecting the shut–off valves. 8 Connecting the electrical meters. 9 Connecting the domestic hot water pump. 10 Connecting the alarm output. 11 Connecting the space cooling/heating ON/OFF output. 12 Connecting the changeover to an external heat source. 13 Connecting the power consumption digital inputs. 14 Connecting the safety thermostat. 7.9.2 About electrical compliance Only for indoor units See "7.9.8  To connect the backup heater power supply"  on page 41. 7.9.3 Precautions when connecting the electrical wiring INFORMATION Also read the precautions and requirements in the following chapters: ▪ General safety precautions ▪ Preparation DANGER: RISK OF ELECTROCUTION WARNING ALWAYS use multicore cable for power supply cables. 7.9.4 Guidelines when connecting the electrical wiring Keep the following in mind: ▪ If stranded conductor wires are being used, install a round crimp- style terminal on the tip. Place the round crimp-style terminal on the wire up to the covered part and fasten the terminal with the appropriate tool. b a a Stranded conductor wire b Round crimp-style terminal ▪ Use the following methods for installing wires: Wire type Installation method Single core wire c b c a a A AA´ A´ a Curled single core wire b Screw c Flat washer Stranded conductor wire with round crimp-style terminal c b b a c a B B a Terminal b Screw c Flat washer Tightening torques Item Tightening torque (N•m) M4 (X1M) 1.2~1.5 M4 (earth) 7.9.5 To connect the electrical wiring on the outdoor unit 1 Remove the 2 switch box cover screws. 2 Remove the switch box cover. 2× 1 2 3 Strip insulation (20 mm) from the wires. a b a Strip wire end to this point b Excessive strip length may cause electrical shock or leakage. 4 Open the wire clamp. 5 Connect the interconnection cable and power supply as follows:

40 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 3× 1 2 3 6 Install the switch box cover. 7.9.6 To connect the electrical wiring on the indoor unit 1 To open the indoor unit, see "7.2.3 To open the indoor unit" on page 29. 2 Wiring should enter the unit from the bottom. 3 Routing of the wiring inside the unit should be as follows: a b c a b c INFORMATION When installing field supply or option cables, foresee sufficient cable length. This will make it possible to remove/ reposition the switch box and gain access to other components during service. Routing Possible cables (depending on unit type and installed options) a Low voltage ▪ Preferential power supply contact ▪ User interface ▪ Domestic hot water tank thermistor (option) ▪ Power consumption digital inputs (field supply) ▪ Outdoor ambient temperature sensor (option) ▪ Electrical meters (field supply) ▪ Safety thermostat (field supply) b High voltage power supply ▪ Interconnection cable ▪ Normal kWh rate power supply ▪ Preferential kWh rate power supply ▪ Power supply for backup heater ▪ Power supply for bottom plate heater (option) ▪ Power supply for booster heater (to indoor unit) ▪ Power supply for booster heater and thermal protection (from indoor unit) c High voltage control signal ▪ Heat pump convector (option) ▪ Room thermostat (option) ▪ 3-way valve ▪ Shut-off valve (field supply) ▪ Domestic hot water pump (field supply) ▪ Alarm output ▪ Changeover to external heat source control ▪ Space heat/cool operation control 4 Fix the cable with cable ties to the cable tie mountings to ensure strain relief and to make sure that it does NOT come in contact with the piping and sharp edges. CAUTION Do NOT push or place redundant cable length in the unit. 7.9.7 To connect the main power supply 1 Connect the main power supply. In case of normal kWh rate power supply

41 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 X1M 1 2 3 1 2 3 X2M X5M X6YB X6YA X6Y X1A X19A 30 31 a Legend: see illustration below. In case of preferential kWh rate power supply Connect X6Y to X6YB. X1M 1 2 3 1 2 L N L N 3 X2M X5M X6YB X6YA X6Y X1A X19A S1S 30 31 3 4 a b c a Interconnection cable (=main power supply) b Normal kWh rate power supply c Preferential power supply contact 2 Fix the cable with cable ties to the cable tie mountings. INFORMATION In case of preferential kWh rate power supply, connect X6Y to X6YB. The necessity of separate normal kWh rate power supply to indoor unit (b) X2M30/31 depends on the type of preferential kWh rate power supply. Separate connection to the indoor unit is required: ▪ if preferential kWh rate power supply is interrupted when active, OR ▪ if no power consumption of the indoor unit is allowed at the preferential kWh rate power supply when active. INFORMATION The preferential kWh rate power supply contact is connected to the same terminals (X5M/3+4) as the safety thermostat. It is only possible for the system to have EITHER preferential kWh rate power supply OR a safety thermostat. 7.9.8 To connect the backup heater power supply CAUTION If the indoor unit has a tank with a built‑in electrical booster heater, use a dedicated power circuit for the backup heater and booster heater. NEVER use a power circuit shared by another appliance. This power circuit MUST be protected with the required safety devices according to the applicable legislation. CAUTION To guarantee the unit is completely earthed, always connect the backup heater power supply and the earth cable. The backup heater capacity can vary, depending on the indoor unit model. Make sure that the power supply is in accordance with the backup heater capacity, as listed in the table below. Backup heater type Backup heater capacity Power supply Maximum running current Zmax(Ω) *3V 3 kW 1~ 230 V 13 A — *9W 3 kW 1~ 230 V 13 A — 6 kW 1~ 230 V 26 A(a)(b) — 6 kW 3~ 230 V 15 A — 6 kW 3N~ 400 V 8.6 A — 9 kW 3N~ 400 V 13 A — (a) Equipment complying with EN/IEC 61000-3-12 (European/ International Technical Standard setting the limits for harmonic currents produced by equipment connected to public low-voltage systems with input current >16 A and ≤75 A per phase.). (b) This equipment complies with EN/IEC 61000‑3‑11 (European/International Technical Standard setting the limits for voltage changes, voltage fluctuations and flicker in public low-voltage supply systems for equipment with rated current ≤75 A) provided that the system impedance Zsys is less than or equal to Zmax at the interface point between the user's supply and the public system. It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with a system impedance Zsys less than or equal to Zmax. 1 Connect the backup heater power supply. For *3V models, a double‑pole fuse is used for F1B. For *9W models, a 4‑pole fuse is used for F1B. 2 If required, modify the connections on terminals X6M and X7M. Backup heater type Connections to backup heater power supply Connections to terminals 3 kW 1~ 230 V (*3V) F1B L N L N —

42 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Backup heater type Connections to backup heater power supply Connections to terminals 3 kW 1~ 230 V (*9W) F1B L N L N 1 2 3 4 6 7 8 5 X6M X7M 6 kW 1~ 230 V (*9W) 1 2 3 4 6 7 8 5 X6M X7M 6 kW 3~ 230 V (*9W) F1B L1 L2 L3 L1 L2 L3 1 2 3 4 6 7 8 5 X6M X7M 6 kW 3N~ 400 V (*9W) 9 kW 3N~ 400 V (*9W) F1B L1 L2 L3 L1 L2 L3 1 2 3 4 6 7 8 5 X6M X7M Special remark for fuses: Special remark for terminals: As mentioned on the table above, the connections on the terminals X6M and X7M need to be changed to configure a backup heater. Refer to the illustration below as a caution about handling the terminals. 3 Fix the cable with cable ties to the cable tie mountings. 4 Configure the user interface for the respective power supply. See "8.2.2 Quick wizard: Standard" on page 48. During connection of the backup heater, miswiring is possible. To detect possible miswiring, it is highly recommended to measure the resistance value of the heater elements. Depending on the different backup heater types, following resistance values (see table below) should be measured. ALWAYS measure the resistance on the contactor clamps K1M, K2M, and K5M. 3 kW 1~ 230 V 6 kW 1~ 230 V 6 kW 3~ 230 V 6 kW 3N~ 400 V 9 kW 3N~ 400 V K1M/1 K5M/13 52.9Ω 52.9Ω 52.9Ω ∞ ∞ K1M/3 ∞ ∞ ∞ 105.8Ω 105.8Ω K1M/5 ∞ ∞ ∞ 105.8Ω 105.8Ω K1M/3 K1M/5 26.5Ω 26.5Ω 26.5Ω 105.8Ω 105.8Ω K2M/1 K5M/13 ∞ 26.5Ω 26.5Ω ∞ ∞ K2M/3 ∞ ∞ ∞ 52.9Ω 52.9Ω K2M/5 ∞ ∞ ∞ 52.9Ω 52.9Ω K2M/3 K2M/5 52.9Ω 52.9Ω 52.9Ω 52.9Ω 52.9Ω K1M/5 K2M/1 ∞ ∞ ∞ ∞ ∞ Example measure resistance between K1M/1 and K5M/13: K1M K2M K2M 1 3 5 13 2 4 6 14 K5M 1 3 5 13 2 4 6 14 1 3 5 13 2 4 6 14 Ω Ω 7.9.9 To connect the user interface ▪ If you use 1 user interface, you can install it at the indoor unit (for control close to the indoor unit), or in the room (when used as room thermostat). ▪ If you use 2 user interfaces, you can install 1 user interface at the indoor unit (for control close to the indoor unit) + 1 user interface in the room (used as room thermostat).

43 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 The procedure differs slightly depending on where you install the user interface. # At the indoor unit In the room 1 Connect the user interface cable to the indoor unit. Fix the cable with cable ties to the cable tie mountings. X2M X5M A2P A2P 2 1 a b a Main user interface(a) b Optional user interface 2 Insert a screwdriver into the slots underneath the user interface and carefully separate the faceplate from the wallplate. The PCB is mounted in the faceplate of the user interface. Be careful NOT to damage it. 3 Use the 2 screws in the accessory bag to fix the wallplate of the user interface to the sheet metal of the unit. Be careful NOT to distort the shape of the backside of the user interface by overtightening the mounting screws. Fix the wallplate of the user interface to the wall. 4 Connect as shown in 4A. Connect as shown in 4A, 4B, 4C or 4D. 5 Reinstall the faceplate onto the wallplate. Be careful NOT to pinch the wiring when attaching the frontplate to the unit. (a) The main user interface is required for operation, but has to be ordered separately (mandatory option). 4A From the rear b a PCB 1× 4B From the left a PCB b 1× 4C From the top a b PCB b 1× 4D From the top centre a PCB b b 1× a Notch this part for the wiring to pass through with nippers etc. b Secure the wiring to the front part of the casing using the wiring retainer and clamp. 7.9.10 To connect the shut-off valve 1 Connect the valve control cable to the appropriate terminals as shown in the illustration below. NOTICE Wiring is different for a NC (normal closed) valve and a NO (normal open) valve. X1M X2M 5 6 7 M2S X1M X2M 5 6 7 M2S NO NC 2 Fix the cable with cable ties to the cable tie mountings. 7.9.11 To connect the electrical meters INFORMATION In case of an electrical meter with transistor output, check the polarity. The positive polarity MUST be connected to X5M/7 and X5M/9; the negative polarity to X5M/8 and X5M/10. 1 Connect the electrical meters cable to the appropriate terminals as shown in the illustration below.

44 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 X2M X5M 78910 S2S S3S 2 Fix the cable with cable ties to the cable tie mountings. 7.9.12 To connect the domestic hot water pump 1 Connect the domestic hot water pump cable to the appropriate terminals as shown in the illustration below. X2M 35 34 1~M M2P 2 Fix the cable with cable ties to the cable tie mountings. 7.9.13 To connect the alarm output 1 Connect the alarm output cable to the appropriate terminals as shown in the illustration below. X1M X2M 29 X1M YC Y1 Y2 Y3 Y4 A4P X2M a a Installation of EKRP1HB is required. 2 Fix the cable with cable ties to the cable tie mountings. 7.9.14 To connect the space cooling/heating ON/ OFF output 1 Connect the space cooling/heating ON/OFF output cable to the appropriate terminals as shown in the illustration below. X1M X2M 29 X1M YC Y1 Y2 Y3 Y4 A4P X2M a a Installation of EKRP1HB is required. 2 Fix the cable with cable ties to the cable tie mountings. 7.9.15 To connect the changeover to external heat source 1 Connect the changeover to external heat source cable to the appropriate terminals as shown in the illustration below. X1M X1M X3 X4 A4P L N X2M X1 X2 a a Installation of EKRP1HB is required. 2 Fix the cable with cable ties to the cable tie mountings. 7.9.16 To connect the power consumption digital inputs 1 Connect the power consumption digital inputs cable to the appropriate terminals as shown in the illustration below. X1M X2M 1 2 3 4 5 A8P X801M S6S S7S S8S S9S a a Installation of EKRP1AHTA is required. 2 Fix the cable with cable ties to the cable tie mountings. 7.9.17 To connect the safety thermostat (normal closed contact) 1 Connect the safety thermostat (normal closed) cable to the appropriate terminals as shown in the illustration below.

45 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 3 4 X5M 2 Fix the cable with cable ties to the cable tie mountings. NOTICE Make sure to select and install the safety thermostat according to the applicable legislation. In any case, to prevent unnecessary tripping of the safety thermostat, it is recommended that … ▪ … the safety thermostat is automatically resettable. ▪ … the safety thermostat has a maximum temperature variation rate of 2°C/min. ▪ … there is a minimum distance of 2  m between the safety thermostat and the motorised 3‑way valve delivered with the domestic hot water tank. INFORMATION After it is installed, do NOT forget to configure the safety thermostat. Without configuration, the indoor unit will ignore the safety thermostat contact. INFORMATION The preferential kWh rate power supply contact is connected to the same terminals (X5M/3+4) as the safety thermostat. It is only possible for the system to have EITHER preferential kWh rate power supply OR a safety thermostat. 7.10 Finishing the outdoor unit installation 7.10.1 To finish the outdoor unit installation 1 Insulate and fix the refrigerant piping and interconnection cable as follows: f b a e d c a Gas pipe b Gas pipe insulation c Interconnection cable d Liquid pipe e Liquid pipe insulation f Finishing tape 2 Install the service cover. 7.10.2 To close the outdoor unit 1 Close the switch box cover. 2 Close the service cover. NOTICE When closing the outdoor unit cover, make sure that the tightening torque does NOT exceed 4.1 N•m. 7.11 Finishing the indoor unit installation 7.11.1 To fix the user interface cover to the indoor unit 1 Make sure that the front panel is removed from the indoor unit. See "7.2.3 To open the indoor unit" on page 29. 2 Plug the user interface cover into the hinges. 3 2 3 Mount the front panel to the indoor unit. 7.11.2 To close the indoor unit 1 Close the switch box cover. 2 Reinstall the front panel. NOTICE When closing the indoor unit cover, make sure that the tightening torque does NOT exceed 4.1 N•m. 8 Configuration 8.1 Overview: Configuration This chapter describes what you have to do and know to configure the system after it is installed. Why If you do NOT configure the system correctly, it might NOT work as expected. The configuration influences the following: ▪ The calculations of the software ▪ What you can see on and do with the user interface How You can configure the system using two different methods. Method Description Configuring via the user interface First time – Quick wizard. When you turn ON the user interface for the first time (via the indoor unit), a quick wizard starts to help you configure the system. Afterwards. If necessary, you can make changes to the configuration afterwards.

46 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Method Description Configuring via the PC configurator You can prepare the configuration off-site on PC and afterwards upload the configuration to the system with the PC configurator. See also: "8.1.1 To connect the PC cable to the switch box" on page 46. INFORMATION When the installer settings are changed, the user interface will request to confirm. When confirmed, the screen will shortly turn OFF and "busy" will be displayed for several seconds. Accessing settings – Legend for tables You can access the installer settings using two different methods. However, NOT all settings are accessible via both methods. If so, the corresponding table columns in this chapter are set to N/A (not applicable). Method Column in tables Accessing settings via the breadcrumb in the menu structure. # Accessing settings via the code in the overview settings. Code See also: ▪ "To access the installer settings" on page 46 ▪ "8.5 Menu structure: Overview installer settings" on page 72 8.1.1 To connect the PC cable to the switch box Prerequisite: The EKPCCAB kit is required. 1 Connect the cable with USB connection to your PC. 2 Connect the plug of the cable to X10A on A1P of the switch box of the indoor unit. A1P X10A 3 Pay special attention to the position of the plug! 2 3 4 5 H J S T 8.1.2 To access the most used commands To access the installer settings 1 Set the user permission level to Installer. 2 Go to [A]: > Installer settings. To access the overview settings 1 Set the user permission level to Installer. 2 Go to [A.8]: > Installer settings > Overview settings. To set the user permission level to Installer 1 Set the user permission level to Adv. end user. 2 Go to [6.4]: > Information > User permission level. 3 Press for more than 4 seconds. Result: is displayed on the home pages. 4 If you do NOT press any button for more than 1 hour or press again for more than 4 seconds, the installer permission level switches back to End user. To set the user permission level to Advanced end user 1 Go to the main menu or any of its submenus: . 2 Press for more than 4 seconds. Result: The user permission level switches to Adv. end user. Additional information is displayed and "+" is added to the menu title. The user permission level will stay in Adv. end user until set otherwise. To set the user permission level to End user 1 Press for more than 4 seconds. Result: The user permission level switches to End user. The user interface will return to the default home screen. To modify an overview setting Example: Modify [1‑01] from 15 to 20. 1 Go to [A.8]: > Installer settings > Overview settings. 2 Go to the corresponding screen of the first part of the setting by using the and button. INFORMATION An additional 0-digit is added to the first part of the setting when you access the codes in the overview settings. Example: [1‑01]: "1" will result in "01". 01 02 06 0a 0e 00 03 07 0b 0f 00 00 04 08 0c 00 01 05 09 0d 15 Overview settings Confirm Adjust Scroll 3 Go to the corresponding second part of the setting by using the and button. 01 02 06 0a 0e 00 03 07 0b 0f 00 00 04 08 0c 00 01 05 09 0d 15 Overview settings Confirm Adjust Scroll Result: The value to be modified is now highlighted. 4 Modify the value by using the and button. 01 02 06 0a 0e 00 03 07 0b 0f 00 00 04 08 0c 00 01 05 09 0d 20 Overview settings Confirm Adjust Scroll 5 Repeat previous steps if you have to modify other settings.

47 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 6 Push to confirm the modification of the parameter. 7 At installer settings menu, press to confirm the settings. Installer settings The system will restart. Confirm Adjust Cancel OK Result: The system will restart. 8.1.3 To copy the system settings from the first to the second user interface If a second user interface is connected, the installer must first proceed below instructions for the proper configuration of the 2 user interfaces. This procedure offers you also the possibility to copy the language set from one user interface to the other one: e.g. from RKRUCBL2 to RKRUCBL1. 1 When power is turned on for the first time, both user interfaces display: 15:10 Tue U5:Auto address Push 4 sec. to continue 2 Push for 4 seconds on the user interface on which you want to proceed to the quick wizard. This user interface is now the main user interface. INFORMATION During the quick wizard, the second user interface displays Busy and will NOT be possible to operate. 3 The quick wizard will guide you. 4 For proper operation of the system, the local data on the two user interfaces must be the same. If this is NOT the case, both user interfaces will display: Synchronization Data difference detected. Please select action: Send data Confirm Adjust 5 Select the required action: ▪ Send data: the user interface you are operating contains the correct data and the data on the other user interface will be overwritten. ▪ Receive data: the user interface you are operating does NOT contain the correct data and the data on the other user interface will be used to overwrite. 6 The user interface requests confirmation if you are sure to proceed. Start copy Are you sure you want to start the copy operation? Cancel OK Confirm Adjust 7 Confirm the selection on the screen by pushing and all data (languages, schedules etc.) will be synchronised from the selected source user interface to the other one. INFORMATION ▪ During the copying, both controllers will NOT allow operation. ▪ The copy operation can take up until 90 minutes. ▪ It is recommended to change installer settings, or the configuration of the unit, on the main user interface. If not, it can take up to 5 minutes before these changes are visible in the menu structure. 8 Your system is now set to be operated by the 2 user interfaces. 8.1.4 To copy the language set from the first to the second user interface See "8.1.3 To copy the system settings from the first to the second user interface" on page 47. 8.1.5 Quick wizard: Set the system layout after first power ON After first power ON of the system, you are guided on the user interface to do initial settings: ▪ language, ▪ date, ▪ time, ▪ system layout. By confirming the system layout, you can proceed with the installation and commissioning of the system. 1 At power ON, the quick wizard starts as long as the system layout was NOT confirmed yet, by setting the language. Language Select the desired language Confirm Adjust 2 Set the current date and time. 1 2012 Scroll Adjust Confirm Date What is the date today? Sun Jan 00 : 00 What is the current time? Time Confirm Adjust Scroll

48 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 3 Set the system layout settings: Standard, Options, Capacities. For more details, see "8.2 Basic configuration" on page 48. A.2 1 Scroll Select System layout Standard Options Capacities Confirm layout 4 After configuration, select Confirm layout and press . Confirm layout Please confirm the system layout. The system will restart and will be ready for first startup. OK Cancel Confirm Adjust 5 The user interface re-initialises and you can proceed the installation by setting the other applicable settings and commissioning of the system. When the installer settings are changed, the system will request to confirm. When confirmation is complete, the screen will shortly turn OFF and "busy" will be displayed for several seconds. 8.2 Basic configuration 8.2.1 Quick wizard: Language / time and date # Code Description [A.1] N/A Language [1] N/A Time and date 8.2.2 Quick wizard: Standard Backup heater configuration (only for *9W model) The backup heater in a *9W model is adapted to be connected to most common European electricity grids. Besides hardware configuration, the grid type and the relay setting must be set on the user interface. # Code Description [A.2.1.5] [5-0D] BUH type: ▪ 1 (1P,(1/1+2)): 6 kW 1~ 230 V (*9W) ▪ 3 (3P,(1/1+2)): 6 kW 3~ 230 V (*9W) ▪ 4 (3PN,(1/2)): 6 kW 3N~ 400 V (*9W) ▪ 5 (3PN,(1/1+2)): 9  kW 3N~  400  V (*9W) Relay setting Relay setting Backup heater operation If backup heater step 1 is active: If backup heater step 2 is active: 1/1+2 Relay 1 ON Relays 1+2 ON 1/2 Relay 1 ON Relay 2 ON Space heating/cooling settings The system can heat up or cool down a space. Depending on the type of application, the space heating/cooling settings must be made accordingly. # Code Description [A.2.1.7] [C-07] Unit control method: ▪ 0 (LWT control): Unit operation is decided based on the leaving water temperature regardless the actual room temperature and/or heating or cooling demand of the room. ▪ 1 (Ext RT control): Unit operation is decided by the external thermostat or equivalent (e.g. heat pump convector). ▪ 2 (RT control): Unit operation is decided based on the ambient temperature of the user interface. [A.2.1.B] N/A Only if there are 2 user interfaces (1 installed in the room, 1 installed at the indoor unit): a b ▪ a: At unit ▪ b: In room as room thermostat User interface location: ▪ At unit: the other user interface is automatically set to In room and if RT control is selected act as room thermostat. ▪ In room (default): the other user interface is automatically set to At unit and if RT control is selected to act as room thermostat. # Code Description [A.2.1.8] [7-02] The system can supply leaving water to up to 2 water temperature zones. During configuration, the number of water zones must be set. Number of LWT zones: ▪ 0 (1 LWT zone)(default): Only 1 leaving water temperature zone. This zone is called the main leaving water temperature zone. a ▪ a: Main LWT zone continued >>

49 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 # Code Description [A.2.1.8] [7-02] << continuation ▪ 1 (2 LWT zones): 2 leaving water temperature zones. The zone with the lowest leaving water temperature (in heating) is called the main leaving water temperature zone. The zone with the highest leaving water temperature (in heating) is called the additional leaving water temperature zone. In practice, the main leaving water temperature zone consists of the higher load heat emitters and a mixing station is installed to achieve the desired leaving water temperature. a b ▪ a: Add LWT zone ▪ b: Main LWT zone # Code Description [A.2.1.9] [F-0D] When the space heating/cooling control is OFF by the user interface, the pump is always OFF. When the space heating/ cooling control is On, you can select the desired pump operation mode (only applicable during space heating/cooling) Pump operation mode: ▪ 0 (Continuous): Continuous pump operation, regardless of thermo ON or OFF condition. Remark: continuous pump operation requires more energy than sample or request pump operation. a b c d b c ▪ a: Space heating/cooling control (user interface) ▪ b: OFF ▪ c: On ▪ d: Pump operation continued >> # Code Description [A.2.1.9] [F-0D] << continuation ▪ 1 (Sample)(default): The pump is ON when there is heating or cooling demand as the leaving water temperature has not reached the desired temperature yet. When thermo OFF condition occurs, the pump runs every 5  minutes to check the water temperature and demand heating or cooling if necessary. Remark: Sample is NOT available in external room thermostat control or room thermostat control. a b d e f c g b c ▪ a: Space heating/cooling control (user interface) ▪ b: OFF ▪ c: On ▪ d: LWT temperature ▪ e: Actual ▪ f: Desired ▪ g: Pump operation continued >> # Code Description [A.2.1.9] [F-0D] << continuation ▪ 2 (Request): Pump operation based on request. Example: Using a room thermostat creates thermo ON/OFF condition. When there is no such demand, the pump is OFF. Remark: Request is NOT available in leaving water temperature control. a d e b b c b c c ▪ a: Space heating/cooling control (user interface) ▪ b: OFF ▪ c: On ▪ d: Heating demand (by ext RT or RT) ▪ e: Pump operation 8.2.3 Quick wizard: Options Domestic hot water settings This chapter only applies to systems with a domestic hot water tank installed: ▪ RHBH/X: an optional domestic hot water tank is available, ▪ RHVH/X: a domestic hot water tank is standard incorporated into the indoor unit.

50 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Following settings must be made accordingly. # Code Description [A.2.2.1] [E-05] DHW operation: Can the system prepare domestic hot water? ▪ 0 (No): NOT installed. Default for RHBH/X. ▪ 1 (Yes): N/A. [A.2.2.3] [E-07] During domestic hot water preparation, the heat pump can be assisted by an electrical heater to ensure the domestic hot water preparation even for high desired tank temperatures. DHW tank type: ▪ 0 (Type 1): Tank with booster heater installed at the side of the tank. Default for RHBH/X. ▪ 1 (Type 2): N/A. Range: 0~6. However, values 2~6 are not applicable for this setting. If the setting is set to 6, an error code will appear and the system will NOT operate. [A.2.2.A] [D-02] The indoor unit offers the possibility to connect a field supplied domestic hot water pump (On/OFF type). Depending on the installation and configuration on the user interface, we distinguish its functionality. DHW pump: ▪ 0 (No)(default): NOT installed. ▪ 1 (Secondary rtrn): Installed for instant hot water when water is tapped. The end-user sets the operation timing (weekly schedule time) of the domestic hot water pump when it should run. Control of this pump is possible through the indoor unit. ▪ 2 (Disinf. shunt): Installed for disinfection. It runs when the disinfection function of the domestic hot water tank is running. No further settings are needed. See also illustrations below. Domestic hot water pump installed for… Instant hot water Disinfection c f b a g c b a d f e g a Indoor unit b Tank c Domestic hot water pump (field supply) d Heater element (field supply) e Non‑return valve (field supply) f Shower (field supply) g Cold water INFORMATION The correct domestic hot water default settings becomes only applicable when domestic hot water operation is activated ([E‑05]=1). Thermostats and external sensors NOTICE If an external room thermostat is used, the external room thermostat will control the room frost protection. However, the room frost protection is only possible if the leaving water temperature control on the unit's user interface is turned ON. See "5 Application guidelines" on page 10. # Code Description [A.2.2.4] [C-05] Contact type main In external room thermostat control, the contact type of the optional room thermostat or heat pump convector for the main leaving water temperature zone must be set. See "5 Application guidelines" on page 10. ▪ 1 (Thermo ON/OFF): The connected external room thermostat or heat pump convector sends the heating or cooling demand by the same signal as it is connected to only 1 digital input (preserved for the main leaving water temperature zone) on the indoor unit (X2M/1). Select this value in case of a connection to the heat pump convector (RFWXV). ▪ 2 (H/C request)(default): The connected external room thermostat sends separate heating and cooling demand and is therefore connected to the 2 digital input (preserved for the main leaving water temperature zone) on the indoor unit (X2M/1 and 2). Select this value in case of connection with the wired (RKRTWA) or wireless (RKRTR1) room thermostat. [A.2.2.5] [C-06] Contact type add. In external room thermostat control with 2 leaving water temperature zones, the type of the optional room thermostat for the additional leaving water temperature zone must be set. See "5 Application guidelines" on page 10. ▪ 1 (Thermo ON/OFF): See Contact type main. Connected on the indoor unit (X2M/1a). ▪ 2 (H/C request)(default): See Contact type main. Connected on the indoor unit (X2M/1a and 2a).

51 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 # Code Description [A.2.2.B] [C-08] External sensor When an optional external ambient sensor is connected, the type of the sensor must be set. See "5 Application guidelines" on page 10. ▪ 0 (No)(default): NOT installed. The thermistor in the user interface and in the outdoor unit are used for measurement. ▪ 1 (Outdoor sensor): Installed. The outdoor sensor will be used to measure the outdoor ambient temperature. Remark: For some functionality, the temperature sensor in the outdoor unit is still used. ▪ 2 (Room sensor): NOT applicable. Digital I/O PCB Modification of these settings is only needed when the optional digital I/O PCB is installed. The digital I/O PCB has multiple functionality which need to be configured. See "5  Application guidelines" on page 10. # Code Description [A.2.2.6.1] [C-02] Ext. backup heat src Indicates if the space heating is also performed by means of another heat source than the system. ▪ 0 (No)(default): NOT installed. ▪ 1 (Bivalent): Installed. The auxiliary boiler (gasboiler, oil burner) will operate when the outdoor ambient temperature is low. During the bivalent operation, the heat pump is turned OFF. Set this value in case an auxililary boiler is used. See "5 Application guidelines" on page 10. [A.2.2.6.3] [C-09] Alarm output Indicates the logic of the alarm output on the digital I/O PCB during malfunctioning. ▪ 0 (Normally open): The alarm output will be powered when an alarm occurs. By setting this value, a distinction is made between the detection of an alarm, and the detection of a power failure. ▪ 1 (Normally closed): The alarm output will NOT be powered when an alarm occurs. See also table below (Alarm output logic). # Code Description [A.2.2.6.4] [F-04] Bottom plate heater Only applicable for RHBH/X11+16 and RHVH/X11+16. Indicates if an optional bottom plate heater is installed on the outdoor unit. The power of the bottom plate heater is in this case supplied by the indoor unit. ▪ 0 (No)(default): NOT installed. ▪ 1 (Yes): Installed. Remark: If this value is set, the output on the digital I/ O PCB cannot be used for space heating/cooling output. See "5 Application guidelines" on page 10. Alarm output logic [C-09] Alarm No alarm No power supply to unit 0 (default) Closed output Open output Open output 1 Open output Closed output Demand PCB The demand PCB is used to enable the power consumption control by digital inputs. See "5 Application guidelines" on page 10. # Code Description [A.2.2.7] [D-04] Demand PCB Only applicable for RHBH/X04+08. Indicates if the optional demand PCB is installed. ▪ 0 (No)(default) ▪ 1 (Pwr consmp ctrl) Energy metering When energy metering is performed by the use of external power meters, configure the settings as described below. Select the pulse frequency output of each power meter in accordance with the power meter specifications. It is possible to connect (up to 2) power meters with different pulse frequencies. When only 1 or no power meter is used, select No to indicate the corresponding pulse input is NOT used. # Code Description [A.2.2.8] [D‑08] Optional external kWh meter 1: ▪ 0 (No): NOT installed ▪ 1: Installed (0.1 pulse/kWh) ▪ 2: Installed (1 pulse/kWh) ▪ 3: Installed (10 pulse/kWh) ▪ 4: Installed (100 pulse/kWh) ▪ 5: Installed (1000 pulse/kWh) [A.2.2.9] [D‑09] Optional external kWh meter 2: ▪ 0 (No): NOT installed ▪ 1: Installed (0.1 pulse/kWh) ▪ 2: Installed (1 pulse/kWh) ▪ 3: Installed (10 pulse/kWh) ▪ 4: Installed (100 pulse/kWh) ▪ 5: Installed (1000 pulse/kWh)

52 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 8.2.4 Quick wizard: Capacities (energy metering) The capacities of all electrical heaters must be set for the energy metering and/or power consumption control feature to work properly. When measuring the resistance value of each heater, you can set the exact heater capacity and this will lead to more accurate energy data. # Code Description [A.2.3.1] [6-02] Booster heater: Only applies to domestic hot water tanks with an internal booster heater (RKHW). The capacity of the booster heater at nominal voltage. Range: 0~10 kW (in steps of 0.2 kW): ▪ RHBH/X: default 3 kW ▪ RHVH/X: default 0 kW [A.2.3.2] [6-03] BUH: step 1: The capacity of the first step of the backup heater at nominal voltage. Nominal value 3 kW. Default: 3 kW. Range: 0~10 kW (in steps of 0.2 kW) [A.2.3.3] [6-04] BUH: step 2: Only applies to a two-step backup heater (*9W). The capacity difference between the second and first step of the backup heater at nominal voltage. Nominal value depends on the backup heater configuration: ▪ 3 kW, 1N~ 230 V: 0 kW ▪ 6 kW, 1N~ 230 V: 3 kW (6 kW-3 kW) ▪ 6 kW, 3~ 230 V: 3 kW (6 kW-3 kW) ▪ 6 kW, 3N~ 400 V: 3 kW (6 kW-3 kW) ▪ 9 kW, 3N~ 400 V: 6 kW (9 kW-3 kW) Range: 0~10 kW (in steps of 0.2 kW): ▪ *3V: default 0 kW ▪ *9W: default 6 kW [A.2.3.6] [6-07] Bottom plate heater: Only applies to an optional bottom plate heater. The capacity of the optional bottom plate heater at nominal voltage. Default: 0 W. Range: 0~200 W (in steps of 10 W) 8.2.5 Space heating/cooling control The basic required settings in order to configure the space heating/ cooling of your system are described in this chapter. The weather- dependent installer settings define the parameters for the weather- dependent operation of the unit. When weather-dependent operation is active, the water temperature is determined automatically depending on the outdoor temperature. Low outdoor temperatures will result in warmer water and vice versa. During weather- dependent operation, the user has the possibility to shift up or down the target water temperature by a maximum of 5°C. See the user reference guide and/or operation manual for more details about this function. Leaving water temperature: Main zone # Code Description [A.3.1.1.1] N/A LWT setpoint mode: ▪ Fixed (default) The desired leaving water temperature is: ▪ NOT weather-dependent (i.e. does NOT depend on the outdoor ambient temperature) ▪ fixed in time (i.e., NOT scheduled) ▪ Weather dep.: The desired leaving water temperature is: ▪ weather-dependent (i.e. depends on the outdoor ambient temperature) ▪ fixed in time (i.e., NOT scheduled) continued >> # Code Description [A.3.1.1.1] N/A << continuation ▪ Fixed/scheduled: The desired leaving water temperature is: ▪ NOT weather-dependent (i.e., does NOT depend on the outdoor ambient temperature) ▪ according a schedule. The scheduled actions consists of desired shift actions, either preset or custom. Remark: This value can only be set in leaving water temperature control. ▪ WD/scheduled: The desired leaving water temperature is: ▪ weather-dependent (i.e., does depend on the outdoor ambient temperature) ▪ according a schedule. The scheduled actions consists of desired leaving water temperatures either preset or custom. Remark: This value can only be set in leaving water temperature control. # Code Description [7.7.1.1] [1-00] [1-01] [1-02] [1-03] Set weather-dependent heating: [1-03] [1-02] Ta Tt [1-00] [1-01] ▪ Tt: Target leaving water temperature (main) ▪ Ta: Outdoor temperature continued >>

53 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 # Code Description [7.7.1.1] [1-00] [1-01] [1-02] [1-03] << continuation ▪ [1-00]: Low outdoor ambient temperature. −40°C~+5°C (default: −10°C) ▪ [1-01]: High outdoor ambient temperature. 10°C~25°C (default: 15°C) ▪ [1-02]: Desired leaving water temperature when the outdoor temperature equals or drops below the low ambient temperature. [9‑01]°C~[9‑00]°C (default: 35°C). Note: This value should be higher than [1-03] as for low outdoor temperatures warmer water is required. ▪ [1-03]: Desired leaving water temperature when the outdoor temperature equals or rises above the high ambient temperature. [9‑01]°C~min(45, [9‑00])°C (default: 25°C). Note: This value should be lower than [1-02] as for high outdoor temperatures less warm water is required. # Code Description [7.7.1.2] [1-06] [1-07] [1‑08] [1-09] Set weather-dependent cooling: [1-09] [1-08] Ta Tt [1-06] [1-07] ▪ Tt: Target leaving water temperature (main) ▪ Ta: Outdoor temperature continued >> # Code Description [7.7.1.2] [1-06] [1-07] [1‑08] [1-09] << continuation ▪ [1-06]: Low outdoor ambient temperature. 10°C~25°C (default: 20°C) ▪ [1-07]: High outdoor ambient temperature. 25°C~43°C (default: 35°C) ▪ [1-08]: Desired leaving water temperature when the outdoor temperature equals or drops below the low ambient temperature. [9‑03]°C~[9‑02]°C (default: 22°C). Note: This value should be higher than [1-09] as for low outdoor temperatures less cold water suffices. ▪ [1-09]: Desired leaving water temperature when the outdoor temperature equals or rises above the high ambient temperature. [9‑03]°C~[9‑02]°C (default: 18°C). Note: This value should be lower than [1-08] as for high outdoor temperatures colder water is required. Leaving water temperature: Additional zone Only applicable if 2 leaving water temperature zones are present. # Code Description [A.3.1.2.1] N/A LWT setpoint mode: ▪ Fixed (default): The desired leaving water temperature is: ▪ NOT weather-dependent (i.e. does NOT depend on the outdoor ambient temperature) ▪ fixed in time (i.e., NOT scheduled) ▪ Weather dep.: The desired leaving water temperature is: ▪ weather-dependent (i.e. depends on the outdoor ambient temperature) ▪ fixed in time (i.e., NOT scheduled) ▪ Fixed/scheduled: The desired leaving water temperature is: ▪ NOT weather-dependent (i.e., does NOT depend on the outdoor ambient temperature) ▪ according a schedule. The scheduled actions are On or OFF. Remark: This value can only be set in leaving water temperature control. ▪ WD/scheduled: The desired leaving water temperature is: ▪ weather-dependent (i.e., does depend on the outdoor ambient temperature) ▪ according a schedule. The scheduled actions are On or OFF. Remark: This value can only be set in leaving water temperature control.

54 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 # Code Description [7.7.2.1] [0-00] [0-01] [0-02] [0-03] Set weather-dependent heating: [0-00] [0-01] Ta Tt [0-03] [0-02] ▪ Tt: Target leaving water temperature (additional) ▪ Ta: Outdoor temperature continued >> # Code Description [7.7.2.1] [0-00] [0-01] [0-02] [0-03] << continuation ▪ [0-03]: Low outdoor ambient temperature. −40°C~+5°C (default: −10°C) ▪ [0-02]: High outdoor ambient temperature. 10°C~25°C (default: 15°C) ▪ [0-01]: Desired leaving water temperature when the outdoor temperature equals or drops below the low ambient temperature. [9‑05]°C~[9‑06]°C (default: 45°C). Note: This value should be higher than [0-00] as for low outdoor temperatures warmer water is required. ▪ [0-00]: Desired leaving water temperature when the outdoor temperature equals or rises above the high ambient temperature. [9‑05]°C~min(45, [9‑06])°C (default: 35°C). Note: This value should be lower than [0-01] as for high outdoor temperatures less warm water is required. # Code Description [7.7.2.2] [0-04] [0-05] [0-06] [0-07] Set weather-dependent cooling: [0-04] [0-05] Ta Tt [0-07] [0-06] ▪ Tt: Target leaving water temperature (additional) ▪ Ta: Outdoor temperature continued >> # Code Description [7.7.2.2] [0-04] [0-05] [0-06] [0-07] << continuation ▪ [0-07]: Low outdoor ambient temperature. 10°C~25°C (default: 20°C) ▪ [0-06]: High outdoor ambient temperature. 25°C~43°C (default: 35°C) ▪ [0-05]: Desired leaving water temperature when the outdoor temperature equals or drops below the low ambient temperature. [9‑07]°C~[9‑08]°C (default: 12°C). Note: This value should be higher than [0‑04] as for low outdoor temperatures less cold water suffices. ▪ [0-04]: Desired leaving water temperature when the outdoor temperature equals or rises above the high ambient temperature. [9‑07]°C~[9‑08]°C (default: 8°C). Note: This value should be lower than [0‑05] as for high outdoor temperatures colder water is required. Leaving water temperature: Delta T source Temperature difference for entering and leaving water. The unit is designed to support under floor loops operation. The recommended leaving water temperature (set by the user interface) for under floor loops is 35°C. In such case, the unit will be controlled to realize a temperature difference of 5°C which means that the entering water to the unit is around 30°C. Depending on the installed application (radiators, heat pump convector, under floor loops) or situation, it can be possible to change the difference between entering and leaving water temperature. Note that the pump will regulate its flow to keep the Δt. # Code Description [A.3.1.3.1] [9-09] Heating: required temperature difference between entering and leaving water. Range: 3°C~10°C (in steps of 1°C; default value: 5°C). [A.3.1.3.2] [9-0A] Cooling: required temperature difference between entering and leaving water. Range: 3°C~10°C (in steps of 1°C; default value: 5°C). Leaving water temperature: Modulation Only applicable in case of room thermostat control. When using the room thermostat functionality, the customer needs to set the desired room temperature. The unit will supply hot water to the heat emitters and the room will be heated. Additionally, also the desired leaving water temperature must be configured: when turning on the modulation, the desired leaving water temperature will be calculated automatically by the unit (based on the preset temperatures, if weather-dependent is selected, modulation will be done based on the desired weather-dependent temperatures); when turning off the modulation, you can set the desired leaving water temperature on the user interface. Moreover, with the modulation turned on, the desired leaving water temperature is lowered or raised in function of the desired room temperature and the difference between the actual and the desired room temperature. This results in: ▪ stable room temperatures exactly matching the desired temperature (higher comfort level) ▪ less On/OFF cycles (lower noise level, higher comfort and higher efficiency)

55 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 ▪ water temperatures as low as possible to match the desired temperature (higher efficiency) # Code Description [A.3.1.1.5] [8-05] Modulated LWT: ▪ No (default): disabled. Note: The desired leaving water temperature needs to be set on the user interface. ▪ Yes: enabled. The leaving water temperature is calculated according to the difference between the desired and the actual room temperature. This creates a better match between the capacity of the heat  pump and the actual required capacity, and results in less start/stop cycles and a more economic operation. Note: The desired leaving water temperature can only be read out on the user interface N/A [8-06] Leaving water temperature maximum modulation: 0°C~10°C (default: 3°C) Requires modulation to be enabled. This is the value by which the desired leaving water temperature is increased or lowered. INFORMATION When leaving water temperature modulation is enabled, the weather‑dependent curve needs to be set to a higher position than [8-06] plus the minimum leaving water temperature setpoint required to reach a stable condition on the comfort setpoint for the room. To increase efficiency, modulation can lower the leaving water setpoint. By setting the weather‑dependent curve to a higher position, it cannot drop below the minimum setpoint. Refer to the illustration below. a +[8-06] −[8-06] b Ta Tt a Weather-dependent curve b Minimum leaving water temperature setpoint required to reach a stable condition on the comfort setpoint for the room. Leaving water temperature: Emitter type Only applicable in case of room thermostat control. Depending on the system water volume and the heat emitters type, the heat up or cool down of a space can take longer. This setting can compensate for a slow or a quick heating/cooling system during the heat up/cool down cycle. Note: The setting of the emitter type will influence the maximum modulation of the desired leaving water temperature and the possibility for usage of the automatic cooling/heating changeover based on the indoor ambient temperature. Therefore it is important to set this correctly. # Code Description [A.3.1.1.7] [9-0B] Emitter type: Reaction time of the system: ▪ Quick Example: Small water volume and fan coils. ▪ Slow Example: Large water volume, floor heating loops. 8.2.6 Domestic hot water control Only applicable in case an optional domestic hot water tank is installed. Configuring the desired tank temperature The domestic hot water can be prepared in 3 different ways. They differ from each other by the way the desired tank temperature is set and how the unit acts upon it. # Code Description [A.4.1] [6-0D] Domestic hot water Type: ▪ 0 (Reheat only): Only reheat operation is allowed. ▪ 1 (Reheat + sched.): The domestic hot water tank is heated according to a schedule and between the scheduled heatup cycles, reheat operation is allowed. ▪ 2 (Scheduled only): The domestic hot water tank can ONLY be heated according to a schedule. See "8.3.2  Domestic hot water control: advanced"  on page  60 for more details. INFORMATION There is a risk of space heating (cooling) capacity shortage/comfort problem (in case of frequent domestic hot water operation, frequent and long space heating/cooling interruption will happen) when selecting [6‑0D]=0 ([A.4.1] Domestic hot water Type=Reheat only) in case of a domestic hot water tank without an internal booster heater. Maximum DHW temperature setpoint The maximum temperature that users can select for the domestic hot water. You can use this setting to limit the temperatures at the hot water taps. INFORMATION During disinfection of the domestic hot water tank, the DHW temperature can exceed this maximum temperature. INFORMATION Limit the maximum hot water temperature according to the applicable legislation.

56 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 # Code Description [A.4.5] [6-0E] Maximum setpoint The maximum temperature that users can select for the domestic hot water. You can use this setting to limit the temperature at the hot water taps. If ▪ [E-07]≠1: 40°C~80°C (default: 60°C) (for RHBH/X in combination with RKHW) ▪ [E-07]=1: 40°C~60°C (default: 60°C) (only for RHVH/X) The maximum temperature is NOT applicable during disinfection function. See disinfection function. 8.2.7 Contact/helpdesk number # Code Description [6.3.2] N/A Number that users can call in case of problems. 8.3 Advanced configuration/ optimization 8.3.1 Space heating/cooling operation: advanced Preset leaving water temperature You can define preset leaving water temperatures: ▪ economic (denotes the desired leaving water temperature which results in the lowest energy consumption) ▪ comfort (denotes the desired leaving water temperature which results in the highest energy consumption). Preset values make it easy to use the same value in the schedule or to adjust the desired leaving water temperature according to the room temperature (see modulation). If you later want to change the value, you ONLY have to do it in one place. Depending on whether the desired leaving water temperature is weather dependent or NOT, the desired shift values or the absolute desired leaving water temperature should be specified. NOTICE The preset leaving water temperatures are ONLY applicable for the main zone, as the schedule for the additional zone consists of On/OFF actions. NOTICE Select preset leaving water temperatures in accordance with the design and selected heat emitters to ensure the balance between desired room and leaving water temperatures. # Code Description Preset leaving water temperature for the main leaving water temperature zone in case of NOT weather dependent [7.4.2.1] [8-09] Comfort (heating) [9‑01]°C~[9‑00]°C (default: 35°C) [7.4.2.2] [8-0A] Eco (heating) [9‑01]°C~[9‑00]°C (default: 33°C) [7.4.2.3] [8-07] Comfort (cooling) [9‑03]°C~[9‑02]°C (default: 18°C) # Code Description [7.4.2.4] [8-08] Eco (cooling) [9‑03]°C~[9‑02]°C (default: 20°C) Preset leaving water temperature (shift value) for the main leaving water temperature zone in case of weather dependent [7.4.2.5] N/A Comfort (heating) –10°C~+10°C (default: 0°C) [7.4.2.6] N/A Eco (heating) –10°C~+10°C (default: –2°C) [7.4.2.7] N/A Comfort (cooling) –10°C~+10°C (default: 0°C) [7.4.2.8] N/A Eco (cooling) –10°C~+10°C (default: 2°C) Temperature ranges (leaving water temperatures) The purpose of this setting is to prevent selecting a wrong (i.e. too hot or too cold) leaving water temperature. Therefore the available desired heating temperature range and desired cooling temperature range can be configured. NOTICE In case of a floor heating application it is important to limit the: ▪ maximum leaving water temperature at heating operation according to the specifications of the floor heating installation. ▪ the minimum leaving water temperature at cooling operation to 18~20°C to prevent condensation on the floor. NOTICE ▪ When adjusting the leaving water temperature ranges, all desired leaving water temperatures are also adjusted to guarantee they are between the limits. ▪ Always balance between the desired leaving water temperature with the desired room temperature and/or the capacity (according to the design and selection of the heat emitters). The desired leaving water temperature is the result of several settings (preset values, shift values, weather dependent curves, modulation). As a result, too high or too low leaving water temperatures could occur which lead to overtemperatures or capacity shortage. By limiting the leaving water temperature range to adequate values (depending on the heat emitter), such situations can be avoided. Example: Set the minimum leaving water temperature to 28°C to avoid NOT to be able to heat up the room: leaving water temperatures MUST be sufficiently higher than the room temperatures (in heating). # Code Description Leaving water temperature range for the main leaving water temperature zone (= the leaving water temperature zone with the lowest leaving water temperature in heating operation and the highest leaving water temperature in cooling operation)

57 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 # Code Description [A.3.1.1.2.2] [9-00] Maximum temp (heating) 37°C~depending on outdoor unit (default: 55°C) [A.3.1.1.2.1] [9-01] Minimum temp (heating) 15°C~37°C (default: 25°C) [A.3.1.1.2.4] [9-02] Maximum temp (cooling) 18°C~22°C (default: 22°C) [A.3.1.1.2.3] [9-03] Minimum temp (cooling) 5°C~18°C (default: 5°C) Leaving water temperature range for the additional leaving water temperature zone (= the leaving water temperature zone with the highest leaving water temperature in heating operation and the lowest leaving water temperature in cooling operation) [A.3.1.2.2.2] [9-06] Maximum temp (heating) 37°C~depending on outdoor unit (default: 55°C) [A.3.1.2.2.1] [9-05] Minimum temp (heating) 15°C~37°C (default: 25°C) [A.3.1.2.2.4] [9-08] Maximum temp (cooling) 18°C~22°C (default: 22°C) [A.3.1.2.2.3] [9-07] Minimum temp (cooling) 5°C~18°C (default: 5°C) Leaving water temperature overshoot temperature This function defines how much the water temperature may rise above the desired leaving water temperature before the compressor stops. The compressor will startup again when the leaving water temperature drops below the desired leaving water temperature. This function is ONLY applicable in heating mode. # Code Description N/A [9-04] 1°C~4°C (default: 1°C) Leaving water temperature compensation around 0°C In heating operation, the desired leaving water temperature is locally increased around an outdoor temperature of 0°C. This compensation can be selected when using an absolute or a weather dependent desired temperature (see illustration below). Use this setting to compensate for possible heat losses of the building due to the evaporation of melted ice or snow (e.g. in cold region countries). Tt TA R L 0°C Tt TA R L 0°C a b a Absolute desired LWT b Weather dependent desired LWT # Code Description N/A [D-03] ▪ 0 (disabled) (default) ▪ 1 (enabled) L=2°C, R=4°C (−2°C

58 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 # Code Description [A.3.2.4] N/A Room temp. step ▪ 1°C (default). The desired room temperature on the user interface is settable per 1°C. ▪ 0.5°C. The desired room temperature on the user interface is settable per 0.5°C. The actual room temperature is displayed with an accuracy of 0.1°C. Room temperature hysteresis ONLY applicable in case of room thermostat control. The hysteresis band around the desired room temperature is settable. It is recommended NOT to change the room temperature hysteresis as it is set for an optimal use of the system. [9-0C] a b c d a Room temperature b Actual room temperature c Desired room temperature d Time # Code Description N/A [9-0C] 1°C~6°C (default: 1°C) Room temperature offset ONLY applicable in case of room thermostat control. You can calibrate the room temperature sensor. It is possible to give an offset to the room thermistor value measured by the user interface. The settings can be used to compensate for situations where the user interface CANNOT be installed on the ideal installation location (see installation manual and/or installer reference guide). # Code Description Room temp. offset: Offset on the actual room temperature measured on the user interface sensor. [A.3.2.2] [2-0A] –5°C~5°C, step 0.5°C (default: 0°C) Room frost protection Room frost protection prevents the room from getting too cold. This setting behaves differently depending on the set unit control method ([C‑07]). Perform actions according to the table below: Unit control method ([C‑07]) Room frost protection Room thermostat control ([C‑07]=2) Allow for the room thermostat to take care of room frost protection: ▪ Set [2‑06] to "1" ▪ Set the room antifrost temperature ([2‑05]). External room thermostat control ([C‑07]=1) Allow for the external room thermostat to take care of room frost protection: ▪ Turn ON the leaving water temperature home page. Leaving water temperature control ([C‑07]=0) Room frost protection is NOT guaranteed. NOTICE If the system does NOT contain a backup heater, do NOT change the default room antifrost temperature. INFORMATION If a U4 error occurs, room frost protection is NOT guaranteed. Refer to the sections below for detailed information on room frost protection in relation to the applicable unit control method. [C‑07]=2: room thermostat control Under room thermostat control, room frost protection is guaranteed, even if the room temperature home page is OFF on the user interface. When room frost protection ([2‑06]) is enabled and the room temperature drops below the room antifrost temperature ([2‑05]), the unit will supply leaving water to the heat emitters to heat up the room again. # Code Description N/A [2-06] Room frost protection ▪ 0: disabled ▪ 1: enabled (default) N/A [2-05] Room antifrost temperature 4°C~16°C (default: 12°C) INFORMATION If a U5 error occurs: ▪ when 1 user interface is connected, room frost protection is NOT guaranteed, ▪ when 2 user interfaces are connected and the second user interface used for room temperature control is disconnected (due to miswiring, damage of the cable), then room frost protection is NOT guaranteed. NOTICE If Emergency is set to Manual ([A.6.C]=0), and the unit is triggered to start emergency operation, the user interface will ask confirmation before starting. Room frost protection is active even if the user does NOT confirm emergency operation. [C‑07]=1: external room thermostat control Under external room thermostat control, room frost protection is guaranteed by the external room thermostat, provided that the leaving water temperature home page is ON on the user interface, and the auto emergency setting ([A.6.C]) is set to "1". Additionally, limited frost protection by the unit is possible:

59 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 In case of… …then the following applies: One leaving water temperature zone ▪ When the leaving water temperature home page is OFF and the outdoor ambient temperature drops below 4°C, then the unit will supply leaving water to the heat emitters to heat up the room again, and the leaving water temperature setpoint will be lowered. ▪ When the leaving water temperature home page is ON, the external room thermostat is "Thermo OFF" and the outdoor ambient temperature drops below 4°C, then the unit will supply leaving water to the heat emitters to heat up the room again and the leaving water temperature setpoint will be lowered. ▪ When the leaving water temperature home page is ON and the external room thermostat is "Thermo ON", then room frost protection is guaranteed by the normal logic. Two leaving water temperature zones ▪ When the leaving water temperature home page is OFF, and the outdoor ambient temperature drops below 4°C, then the unit will supply leaving water to the heat emitters to heat up the room again, and the leaving water temperature setpoint will be lowered. ▪ When the leaving water temperature home page is ON, the operation mode is "heating", and the outdoor ambient temperature drops below 4°C, then the unit will supply leaving water to the heat emitters to heat up the room again, and the leaving water temperature setpoint will be lowered. ▪ The selection of "cooling" or "heating" is done via the user interface. When the leaving water temperature home page is ON and the operation mode is "cooling", then there is no protection. [C‑07]=0: leaving water temperature control Under leaving water temperature control, room frost protection is NOT guaranteed. However, if [2‑06] is set to "1", limited frost protection by the unit is possible: ▪ When the leaving water temperature home page is OFF and the outdoor ambient temperature drops below 4°C, then the unit will supply leaving water to the heat emitters to heat up the room again, and the leaving water temperature setpoint will be lowered. ▪ When the leaving water temperature home page is ON and the operation mode is "heating", then the unit will supply leaving water to the heat emitters to heat up the room according to normal logic. ▪ When the leaving water temperature home page is ON and the operation mode is "cooling", then there is no protection. Shut-off valve The following is only applicable in case of 2 leaving water temperature zones. In case of 1 leaving water temperature zone, connect the shut-off valve to the heating/cooling output. The shut-off valve, which is in the main leaving water temperature zone, output is configurable. INFORMATION During defrost operation, the shut-off valve is ALWAYS opened. Thermo On/OFF: the valve closes, depending on [F-0B] when there is no heating demand from the main zone. Enable this setting to: ▪ avoid leaving water supply to the heat emitters in the main LWT zone (through the mixing valve station) when there is request from the additional LWT zone. ▪ activate the On/OFF pump of the mixing valve station ONLY when there is demand. See "5 Application guidelines" on page 10. # Code Description [A.3.1.1.6.1] [F-0B] The shut-off valve: ▪ 0 (No)(default): is NOT influenced by heating or cooling demand. ▪ 1 (Yes): closes when there is NO heating or cooling demand. INFORMATION The setting [F‑0B] is only valid when there is a thermostat or external room thermostat request setting (NOT in case of leaving water temperature setting). Cooling: ONLY applicable for RHBX and RHVX. The shut-off valve closes, depending on [F-0C] when the unit is running in cooling operation mode. Enable this setting to avoid cold leaving water through the heat emitter and the forming of condensation (e.g. under floor heating loops or radiators). # Code Description [A.3.1.1.6.2] [F-0C] The shut-off valve: ▪ 0 (No): is NOT influenced by changing the space operation mode to cooling. ▪ 1 (Yes)(default): closes when the space operation mode is cooling. Operation range Depending on the average outdoor temperature, the operation of the unit in space heating or space cooling is prohibited. Space heating OFF temp: When the averaged outdoor temperature raises above this value, space heating is turned OFF to avoid overheating. # Code Description [A.3.3.1] [4-02] ▪ RHBH/X04+08 and RHVH/X04+08: 14°C~35°C (default: 25°C) ▪ RHBH/X11+16 and RHVH/X11+16: 14°C~35°C (default: 35°C) The same setting is also used in automatic heating/cooling changeover. Space cooling On temp: ONLY applicable for RHBX and RHVX. When the averaged outdoor temperature drops below this value, space cooling is turned OFF.

60 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 # Code Description [A.3.3.2] [F-01] 10°C~35°C (default: 20°C) The same setting is also used in automatic heating/cooling changeover. Automatic heating/cooling changeover ONLY applicable for RHBX and RHVX. The end-user sets the desired operation mode on the user interface: Heating, Cooling or Automatic (see also operation manual/user reference guide). When Automatic is selected, the changing of the operation mode is based on: ▪ Monthly allowance for heating and/or cooling: the end-user indicates on a monthly base which operation is allowed ([7.5]: both heating/cooling or heating ONLY or cooling ONLY). If the allowed operation mode changes to cooling ONLY, the operation mode changes to cooling. If the allowed operation mode changes to heating ONLY, the operation mode changes to heating. ▪ Averaged outdoor temperature: the operation mode will be changed in order to ALWAYS be within range determined by the space heating OFF temperature for heating and the space cooling On temperature for cooling. If the outdoor temperature drops, the operation mode switches to heating and vice versa. Note that the outdoor temperature will be time-averaged (see "8 Configuration" on page 45). When the outdoor temperature is between the space cooling On and the space heating OFF temperature, the operation mode remains unchanged unless the system is configured in room thermostat control with one leaving water temperature zone and quick heat emitters. In that case, the operation mode will change based on: ▪ Measured indoor temperature: besides the heating and the cooling desired room temperature, the installer sets a hysteresis value (e.g. when in heating, this value is related to the desired cooling temperature) and an offset value (e.g. when in heating, this value is related to the desired heating temperature). Example: the desired room temperature in heating is 22°C and in cooling 24°C, with a hysteresis value of 1°C and an offset of 4°C. Changeover from heating to cooling will occur when the room temperature rises above the maximum of the desired cooling temperature added by the hysteresis value (thus 25°C) and the desired heating temperature added by the offset value (thus 26°C). Oppositely, changeover from cooling to heating will occur when the room temperature drops below the minimum of the desired heating temperature subtracted by the hysteresis value (thus 21°C) and the desired cooling temperature subtracted by the offset value (thus 20°C). ▪ Guard timer to prevent too frequent changing from heating to cooling and vice versa. Changeover settings related to the outdoor temperature (ONLY when automatic is selected): # Code Description [A.3.3.1] [4-02] Space heating OFF temp. If the outdoor temperature rises above this value, the operation mode will change to cooling: ▪ RHBH/X04+08 and RHVH/X04+08: 14°C~35°C (default: 25°C) ▪ RHBH/X11+16 and RHVH/X11+16: 14°C~35°C (default: 35°C) [A.3.3.2] [F-01] Space cooling On temp. If the outdoor temperature drops below this value, the operation mode will change to heating: Range: 10°C~35°C (default: 20°C) # Code Description Changeover settings related to the indoor temperature. ONLY applicable when Automatic is selected and the system is configured in room thermostat control with 1 leaving water temperature zone and quick heat emitters. N/A [4-0B] Hysteresis: Ensures that changeover is ONLY done when necessary. Example: The space operation mode ONLY changes from cooling to heating when the room temperature drops below the desired heating temperature subtracted by the hysteresis. Range: 1°C~10°C, step 0.5°C (default: 1°C) N/A [4-0D] Offset: Ensures that the active desired room temperature can be reached. Example: if heating to cooling changeover would occur below the desired room temperature in heating, this desired room temperature could never be reached. Range: 1°C~10°C, step 0.5°C (default: 3°C) 8.3.2 Domestic hot water control: advanced Preset tank temperatures Only applicable when domestic hot water preparation is scheduled or scheduled + reheat. You can define preset tank temperatures: ▪ storage economic ▪ storage comfort ▪ reheat ▪ reheat hysteresis Preset values make it easy to use the same value in the schedule. If you later want to change the value, you only have to do it in 1 place (see also operation manual and/or user reference guide). Storage comfort When programming the schedule, you can make use of the tank temperatures set as preset values. The tank will then heat up until these setpoint temperatures have been reached. Additionally, a storage stop can be programmed. This feature puts a stop to tank heating even if the setpoint has NOT been reached. Only program a storage stop when tank heating is absolutely undesirable. # Code Description [7.4.3.1] [6-0A] 30°C~[6‑0E]°C (default: 60°C) Storage eco The storage economic temperature denotes the lower desired tank temperature. It is the desired temperature when a storage economic action is scheduled (preferably during day). # Code Description [7.4.3.2] [6-0B] 30°C~min(50, [6‑0E])°C (default: 45°C) Reheat The desired reheat tank temperature is used: ▪ in reheat mode of scheduled + reheat mode: The guaranteed minimum tank temperature is set by THP OFF–[6‑08], which is either [6‑0C] or the weather dependent setpoint, minus the reheat hysteresis. If the tank temperature drops below this value, the tank is heated up.

61 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 # Code Description [7.4.3.3] [6-0C] 30°C~min(50, [6‑0E])°C (default: 45°C) Reheat hysteresis Only applicable when domestic hot water preparation is scheduled + reheat. # Code Description N/A [6-08] 2°C~20°C (default: 10°C) Weather dependent The weather dependent installer settings define the parameters for the weather dependent operation of the unit. When weather dependent operation is active the desired tank temperature is determined automatically depending on the averaged outdoor temperature: low outdoor temperatures will result in higher desired tank temperatures as the cold water tap is colder and vice versa. In case of scheduled or scheduled+reheat domestic hot water preparation, the storage comfort temperature is weather dependent (according to the weather dependent curve), the storage economic and reheat temperature are NOT weather dependent. In case of reheat only domestic hot water preparation, the desired tank temperature is weather dependent (according to the weather dependent curve). During weather dependent operation, the end- user cannot adjust the desired tank temperature on the user interface. # Code Description [A.4.6] N/A Weather dependent desired tank temperature is: ▪ Fixed (default): disabled. All desired tank temperature are NOT weather dependent. ▪ Weather dep.: enabled. In scheduled or scheduled+reheat mode, the storage comfort temperature is weather dependent. Storage economic and reheat temperatures are NOT weather dependent. In reheat mode, the desired tank temperature is weather dependent. Note: When the displayed tank temperature is weather dependent, it cannot be adjusted on the user interface. # Code Description [A.4.7] [0-0E] [0-0D] [0-0C] [0-0B] Weather-dependent curve TDHW Ta [0-0C] [0-0B] [0-0E] [0-0D] ▪ TDHW: The desired tank temperature. ▪ Ta: The (averaged) outdoor ambient temperature ▪ [0-0E]: low outdoor ambient temperature: −40°C~5°C (default: −10°C) ▪ [0-0D]: high outdoor ambient temperature: 10°C~25°C (default: 15°C) ▪ [0-0C]: desired tank temperature when the outdoor temperature equals or drops below the low ambient temperature: 45°C~[6‑0E]°C (default: 60°C) ▪ [0-0B]: desired tank temperature when the outdoor temperature equals or rises above the high ambient temperature: 35°C~[6‑0E]°C (default: 55°C)

62 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Booster heater and heat pump operation # Code Description N/A [4-03] Defines the operation permission of the booster heater depending on ambient, domestic hot water temperature or operation mode of heat pump. This setting is only applicable in reheat mode for applications with separate domestic hot water tank. ▪ 0: Booster heater operation is NOT allowed except for "Disinfection function" and "Powerful domestic water heating". Only use this in case the capacity of the heat  pump can cover the heating requirements of the house and domestic hot water over the complete heating season. If the outdoor temperature is below setting [5-03] and [5-02]=1, the domestic hot water will not be heated. The domestic hot water temperature can be maximum the heat pump OFF temperature. ▪ 1: Booster heater operation is allowed when required. ▪ 2: The booster heater is allowed outside the operation range of the heat pump for domestic hot water operation. Booster heater operation is only allowed if: ▪ Ambient temperature is out of the operating range: Ta<[5-03] or Ta>35°C ▪ Domestic hot water temperature is 2°C lower than the heat pump OFF temperature. continued >> # Code Description N/A [4-03] << continuation The booster heater will be allowed to operate when Ta<[5-03] depends of the status of [5-02]. If bivalent operation is enabled and permission signal for auxiliary boiler is ON, the booster heater will be restricted even when Ta<[5-03]. See [C-02]. ▪ 3 (default): The booster heater is allowed when the heat pump is NOT active in domestic hot water operation. Same as setting  1, but simultaneous heat pump domestic hot water operation and booster heater operation is not allowed. ▪ 4: Booster heater operation is NOT allowed except for "Disinfection function". Only use this in case the capacity of the heat  pump can cover the heating requirements of the house and domestic hot water over the complete heating season. If the outdoor temperature is below setting [5-03] and [5-02]=1, the domestic hot water will not be heated. The domestic hot water temperature can be maximum the heat pump OFF temperature. When setting [4-03]=1/2/3/4, the booster heater operation can still be restricted by the booster heater allowance schedule. N/A [7-00] Overshoot temperature. Temperature difference above the domestic hot water set point temperature before the booster heater is turned OFF. The domestic hot water tank temperature will increase with [7-00] above selected temperature set point. Range: 0°C~4°C (default: 0°C) N/A [7-01] Hysteresis. Temperature difference between booster heater ON and booster heater OFF temperature. The minimum hysteresis temperature is 2°C. Range: 2°C~40°C (default: 2°C) N/A [6-00] The temperature difference determining the heat pump ON temperature. Range: 2°C~20°C (default: 2°C) N/A [6-01] The temperature difference determining the heat pump OFF temperature. Range: 0°C~10°C (default: 2°C) Example: setpoint (TU)>maximum heat pump temperature–[6‑01] (THP MAX–[6‑01])

63 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 t TBH ON TDHW THP ON THP OFF THP MAX TU TBH OFF [6-01] [6-00] [7-00] [7-01] TU = 70°C [7-00] = 3°C [6-01] = 2°C [6-00] = 7°C HP BH HP 5 10 20 30 40 41 48 50 60 71 70 73 BH Booster heater HP Heat pump. If heating up time by the heat pump takes too long, auxiliary heating by the booster heater can take place TBH OFF Booster heater OFF temperature (TU+[7-00]) TBH ON Booster heater ON temperature (TBH OFF−[7-01]) THP MAX Maximum heat pump temperature at sensor in domestic hot water tank THP OFF Heat pump OFF temperature (THP MAX−[6-01]) THP ON Heat pump ON temperature (THP OFF−[6-00]) TDHW Domestic hot water temperature TU User set point temperature (as set on the user interface) t Time Example: setpoint (TU)≤maximum heat pump temperature–[6‑01] (THP MAX–[6‑01]) t [6-00] HP 5 10 20 30 40 43 45 TU=THP OFF THP MAX TDHW THP ON 50 HP Heat pump. If heating up time by the heat pump takes too long, auxiliary heating by the booster heater can take place THP MAX Maximum heat pump temperature at sensor in domestic hot water tank THP OFF Heat pump OFF temperature (THP MAX−[6-01]) THP ON Heat pump ON temperature (THP OFF−[6-00]) TDHW Domestic hot water temperature TU User set point temperature (as set on the user interface) t Time INFORMATION The maximum heat pump temperature depends on the ambient temperature. Timers for simultaneous request space and domestic hot water operation # Code Description N/A [8-00] Do not change. (default: 1) # Code Description N/A [8-01] Maximum running time for domestic hot water operation. Domestic hot water heating stops even when the target domestic hot water temperature is NOT reached. The actual maximum running time also depends on setting [8-04]. ▪ When system layout = Room thermostat control: This preset value is only taken into account if there is a request for space heating or cooling. If there is NO request for space heating/ cooling, the tank is heated until the setpoint has been reached. ▪ When system layout ≠ Room thermostat control: This preset value is always taken into account. Range: 5~95 minutes (default: 30) N/A [8-02] Anti-recycling time. Minimum time between two cycles for domestic hot water. The actual anti- recycling time also depends on setting [8-04]. Range: 0~10 hours (default: 3) (step: 0.5 hour) (only for RHBH/X). Range: 0~10 hours (default: 0.5) (step: 0.5 hour) (only for RHVH/X). Remark: The minimum time is 1/2 hour even when the selected value is 0. N/A [8-03] Booster heater delay timer. Only for RKHW Start-up delay time for the booster heater when domestic hot water mode is active. ▪ When domestic hot water mode is NOT active, the delay time is 20 minutes. ▪ The delay time starts from booster heater ON temperature. ▪ By adapting the booster heater delay time versus the maximum running time, you can find an optimal balance between the energy efficiency and the heat up time. ▪ If the booster heater delay time is set too high, it might take a long time before the domestic hot water reaches its set temperature. ▪ The setting [8-03] is only meaningful if setting [4-03]=1. Setting [4-03]=0/2/3/4 limits the booster heater automatically in relation to heat pump operation time in domestic water heating mode. ▪ Make sure that [8-03] is always in relation with the maximum running time [8-01]. Range: 20~95 minutes (default: 50). N/A [8-04] Additional running time for the maximum running time depending on the outdoor temperature [4-02] or [F-01]. Range: 0~95 minutes (default: 95). [8-02]: Anti-recycling time

64 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 t 1 0 1 0 [8-01] [8-02] [8-00] 1 Heat pump domestic water heating mode (1=active, 0=not active) 2 Hot water request for heat pump (1=request, 0=no request) t Time [8-03]: Booster heater delay timer t 1 0 1 0 1 0 [8-03] 3 4 1 0 1 Booster heater operation (1=active, 0=not active) 2 Heat pump domestic water heating mode (1=active, 0=not active) 3 Hot water request for booster heater (1=request, 0=no request) 4 Hot water request for heat pump (1=request, 0=no request) t Time [8-04]: Additional running time at [4-02]/[F-01] t TA t TA 0 [8-01] [5-03] [4-02] [8-02] [8-01]+ [8-04] 0 [8-01] [F-01] 35°C [8-02] [8-01]+ [8-04] TA Ambient (outdoor) temperature t Time Anti-recycle time Maximum running time domestic hot water Disinfection Applies only to installations with a domestic hot water tank. The disinfection function disinfects the domestic hot water tank by periodically heating the domestic hot water to a specific temperature. CAUTION The disinfection function settings MUST be configured by the installer according to the applicable legislation. # Code Description [A.4.4.2] [2‑00] Operation day: ▪ 0: Each day ▪ 1: Monday ▪ 2: Tuesday ▪ 3: Wednesday ▪ 4: Thursday ▪ 5: Friday ▪ 6: Saturday ▪ 7: Sunday [A.4.4.1] [2‑01] Disinfection ▪ 0: No ▪ 1: Yes [A.4.4.3] [2‑02] Start time: 00~23:00, step: 1:00. [A.4.4.4] [2‑03] Temperature target: ▪ With booster heater: 55°C~80°C, default: 70°C. ▪ Without booster heater: 60°C (fixed). [A.4.4.5] [2‑04] Duration: ▪ With booster heater: 5~60 minutes, default: 10 minutes. ▪ Without booster heater: 40~60 minutes, default: 40 minutes. 00.00 22.00 24.00 01.00 23.00 t TDHW TH TU [2-02] [2-03] [2-04] TDHW Domestic hot water temperature TU User set point temperature TH High set point temperature [2-03] t Time WARNING Be aware that the domestic hot water temperature at the hot water tap will be equal to the value selected in field setting [2-03] after a disinfection operation. When the high domestic hot water temperature can be a potential risk for human injuries, a mixing valve (field supply) shall be installed at the hot water outlet connection of the domestic hot water tank. This mixing valve shall secure that the hot water temperature at the hot water tap never rise above a set maximum value. This maximum allowable hot water temperature shall be selected according to the applicable legislation. CAUTION Be sure that the disinfection function start time [A.4.4.3] with defined duration [A.4.4.5] is NOT interrupted by possible domestic hot water demand.

65 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 CAUTION The booster heater permission schedule is used to restrict or allow booster heater operation based on a weekly program. Advice: In order to avoid unsuccessful disinfection function, at least allow the booster heater (by the weekly program) for minimum 4 hours starting from the scheduled start-up of disinfection. If the booster heater is restricted during disinfection, this function will NOT be successful and the applicable warning AH will be generated. INFORMATION In case of error code AH and no interruption of the disinfection function occurred due to domestic hot water tapping, following actions are recommended: ▪ When the Domestic hot water > Type > Reheat or Reheat + sched. is selected, it is recommended to program the start-up of the disinfection function at least 4  hours later than the last expected large hot water tapping. This start-up can be set by installer settings (disinfection function). ▪ When the Domestic hot water > Type > Scheduled only is selected, it is recommended to program a Storage eco 3  hours before the scheduled start-up of the disinfection function to preheat the tank. INFORMATION Disinfection function is restarted in case the domestic hot water temperature drops 5°C below the disinfection target temperature within the duration time. INFORMATION An AH error occurs if you do the following during disinfection: ▪ Set the user permission level to Installer. ▪ Go to the DHW tank temperature home page (Tank). ▪ Press to interrupt the disinfection. 8.3.3 Heat source settings Backup heater For systems without domestic hot water tank or with separate domestic hot water tank (only for RHBH/X) Backup heater operation mode: defines when backup heater operation is enabled or disabled. This setting is only overruled when backup heating is required during defrost operation or malfunctioning of the outdoor unit (when [A.6.C] is enabled). For systems with an integrated domestic hot water tank (only for RHVH/X) Backup heater operation mode: defines when backup heater operation is disabled or only allowed during domestic hot water operation. This setting is only overruled when backup heating is required during defrost operation or malfunctioning of the outdoor unit (when [A.6.C] is enabled). # Code Description [A.5.1.1] [4‑00] Backup heater operation: ▪ 0: Disabled ▪ 1 (default): Enabled # Code Description [A.5.1.3] [4‑07] Defines whether backup heater second step is: ▪ 1: Allowed ▪ 0: NOT allowed In this way it is possible to limit the backup heater capacity. N/A [5-00] Is backup heater operation allowed above equilibrium temperature during space heating operation? ▪ 1: NOT allowed ▪ 0: Allowed [A.5.1.4] [5‑01] Equilibrium temperature. Outdoor temperature below which operation of the backup heater is allowed. Range: –15°C~35°C (default: 0°C) (step: 1°C) INFORMATION Only for systems with integrated domestic hot water tank: If backup heater operation during space heating needs to be limited but can be allowed for domestic hot water operation, then set [4‑00] to 2. INFORMATION Only for systems with integrated domestic hot water tank: If the storage temperature set point is higher than 50°C, ROTEX recommends NOT to disable the backup heater second step because it will have a big impact on the required time for the unit to heat up the domestic hot water tank. Auto emergency When the heat pump fails to operate, the backup heater and booster heater can serve as an emergency heater and either automatically or non-automatically take over the heat load. ▪ When auto emergency is set to Automatic and a heat pump failure occurs: ▪ The backup heater will automatically take over the heat load. ▪ The booster heater will automatically take over the domestic hot water production. ▪ When auto emergency is set to Manual and a heat pump failure occurs, the domestic hot water and space heating operations will stop and need to be recovered manually. The user interface will then ask you to confirm whether the backup heater or booster heater can take over the heat load or not. When the heat pump fails, will appear on the user interface. If the house is unattended for longer periods, we recommend to set [A.6.C] Emergency to Automatic. # Code Description [A.6.C] N/A Emergency: ▪ 0: Manual (default) ▪ 1: Automatic INFORMATION If [4‑03]=1 or 3, then Emergency=Manual is not applicable for the booster heater. INFORMATION The auto emergency setting can be set in the menu structure of the user interface only.

66 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 INFORMATION If a heat pump failure occurs and [A.6.C] is set to Manual, the room frost protection function, the underfloor heating screed dryout function, and the water pipe antifreeze function will remain active even if the user does NOT confirm emergency operation. Bivalent Applies only to installations with an auxiliary boiler (alternating operation, parallel connected). The purpose of this function is to determine — based on the outdoor temperature (possibility 1) or on energy prices (possibility 2) — which heating source can/will provide the space heating, either the indoor unit or an auxiliary boiler. The field setting "bivalent operation" applies only the indoor unit space heating operation and the permission signal for the auxiliary boiler. Possibility 1 The installer can set a temperature below which the boiler will always operate when electric prices (High, Medium, Low) are "0" in the menu structure. NOTICE Do NOT use overview settings! When the "bivalent operation" function is enabled, the indoor unit will stop automatically in space heating operation when the outdoor temperature drops below "bivalent ON temperature" and the permission signal for the auxiliary boiler becomes active. When the bivalent operation function is disabled, the space heating by indoor unit is possible at all outdoor temperatures (see operation ranges) and permission signal for auxiliary boiler is ALWAYS deactivated. ▪ [C‑03] Bivalent ON temperature: defines the outdoor temperature below which the permission signal for the auxiliary boiler will be active (closed, KCR on EKRP1HB) and space heating by indoor unit will be stopped. ▪ [C‑04] Bivalent hysteresis: defines the temperature difference between bivalent ON temperature and bivalent OFF temperature. Permission signal X1–X2 (EKRP1HB) TA [C-03] [C-04] a b TA Outdoor temperature a Closed b Open # Code Description N/A [C-03] Range: –25°C~25°C (default: 0°C) (step: 1°C) N/A [C-04] Range: 2°C~10°C (default: 3°C) (step: 1°C) Possibility 2 The installer can set a temperature range ([C‑04]). Depending on the energy prices, a calculated point Tcalc changes between this range. # Code Description [7.4.5.1] N/A What is the high electricity price? [7.4.5.2] N/A What is the medium electricity price? [7.4.5.3] N/A What is the low electricity price? # Code Description [7.4.6] N/A What is the fuel price? NOTICE Do NOT use overview settings! When TA reaches the Tcalc point, then the bivalent heat source permission will be active. To prevent too much switching, there is a hysteresis of 3°C. ▪ [C‑03] ON temperature. Below this temperature, bivalent will always be ON. Tcalc is ignored. ▪ [C‑04] Operation range between which Tcalc is calculated. TA Tcalc [C-03]+[C-04] 3°C [C-03] a b TA Outdoor temperature Tcalc Calculated temperature a Closed b Open # Code Description N/A [C-03] Range: –25°C~25°C (default: 0°C) (step: 1°C) N/A [C-04] Range: 2°C~10°C (default: 3°C) (step: 1°C) It is recommended to choose [C‑04] bigger than the default value to have an optimal operation when choosing possibility 2. Depending on the used boiler, the boiler efficiency should be chosen as follows: # Code Description [A.6.A] [7‑05] ▪ 0: Very high ▪ 1: High ▪ 2: Medium ▪ 3: Low ▪ 4: Very low INFORMATION Electricity price can only be set when bivalent is ON ([A.2.2.6.1] or [C-02]). These values can only be set in menu structure [7.4.5.1], [7.4.5.2] and [7.4.5.3]. Do NOT use overview settings. INFORMATION Boiler efficiency [A.6.A] or [7‑05] becomes visible when bivalent is ON ([A.2.2.6.1] or [C‑02]). CAUTION Make sure to observe all rules mentioned in application guideline 5 when bivalent operation function is enabled. ROTEX shall NOT be held liable for any damage resulting from failure to observe this rule.

67 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 INFORMATION ▪ The combination of setting [4‑03]=0/2 with bivalent operation at low outdoor temperature can result in domestic hot water shortage. ▪ The bivalent operation function has no impact on the domestic water heating mode. The domestic hot water is still and only heated by the indoor unit. ▪ The permission signal for the auxiliary boiler is located on the EKRP1HB (digital I/O PCB). When it is activated, the contact X1, X2 is closed and open when it is deactivated. See illustration below for the schematic location of this contact. YC Y1 Y2 Y3 Y4 X1 X2 X3 X4 OFF ON X2M SS1 X1M 8.3.4 System settings Priorities For systems with separate domestic hot water tank (only for RHBH/X) # Code Description N/A [5-02] Space heating priority. Defines whether domestic hot water is made by booster heater only when outdoor temperature is below space heating priority temperature. It is recommended to enable this function to shorten tank heating operation time and guaranteed domestic hot water comfort. ▪ 0: disabled ▪ 1: enabled [5‑01] Equilibrium temperature and [5‑03] Space heating priority temperature are related to backup heater. So, you must set [5‑03] equal or a few degrees higher than [5‑01]. N/A [5-03] Space heating priority temperature. Defines the outdoor temperature which below the domestic hot water will be heated by booster heater only. Range: –15°C~35°C (default: 0°C). # Code Description N/A [5-04] Set point correction for domestic hot water temperature: set point correction for the desired domestic hot water temperature, to be applied at low outdoor temperature when space heating priority is enabled. The corrected (higher) set point will make sure that the total heat capacity of the water in the tank remains approximately unchanged, by compensating for the colder bottom water layer of the tank (because the heat exchanger coil is not operational) with a warmer top layer. Range: 0°C~20°C (default: 10°C). For systems with an integrated domestic hot water tank (only for RHVH/X) # Code Description N/A [5‑02] Space heating priority. Defines whether backup heater will assist the heat pump during domestic hot water operation. Consequence: Shorter tank heating operation time and shorter interruption of the space heating cycle. This setting MUST always be 1. [5‑01] Equilibrium temperature and [5‑03] Space heating priority temperature are related to backup heater. So, you must set [5‑03] equal or a few degrees higher than [5‑01]. If the backup heater operation is limited ([4‑00]=0) and the outdoor temperature is lower than setting [5‑03], the domestic hot water will not be heated with the backup heater. N/A [5‑03] Space heating priority temperature. Defines the outdoor temperature which below the backup heater will assist during domestic hot water heating. Auto-restart When power returns after a power supply failure, the auto restart function reapplies the remote controller settings at the time of the power failure. Therefore, it is recommended to always enable the function. If the preferential kWh rate power supply is of the type that power supply is interrupted, always enable the auto restart function. Continuous indoor unit control can be guaranteed independent of the preferential kWh rate power supply status, by connecting the indoor unit to a normal kWh rate power supply. # Code Description [A.6.1] [3‑00] Is the auto restart function of the unit allowed? ▪ 0: No ▪ 1 (default): Yes

68 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Preferential kWh rate power supply INFORMATION The preferential kWh rate power supply contact is connected to the same terminals (X5M/3+4) as the safety thermostat. It is only possible for the system to have EITHER preferential kWh rate power supply OR a safety thermostat. # Code Description [A.2.1.6] [D‑01] Connection to a preferential kWh rate power supply: ▪ 0 (default): The outdoor unit is connected to a normal power supply. ▪ 1: The outdoor unit is connected to a preferential kWh rate power supply. When the preferential kWh rate signal is sent by the electricity company, the contact will open and the unit will go in forced off mode. When the signal is released again, the voltage-free contact will close and the unit will restart operation. Therefore, always enable the auto restart function. ▪ 2: The outdoor unit is connected to a preferential kWh rate power supply. When the preferential kWh rate signal is sent by the electricity company, the contact will close and the unit will go in forced off mode. When the signal is released again, the voltage-free contact will open and the unit will restart operation. Therefore, always enable the auto restart function. Remark: 3 is related to safety thermostat. [A.6.2.1] [D‑00] Which heaters are allowed to operate during preferential kWh rate power supply? ▪ 0 (default): None ▪ 1: N/A ▪ 2: Backup heater only ▪ 3: N/A See table below. Setting 2 is only meaningful if the preferential kWh rate power supply is of type 1 or indoor unit is connected to a normal kWh rate power supply (via X2M/30-31) and the backup heater is NOT connected to the preferential kWh rate power supply. Only for RHBH/X + RKHW: [D‑00] Booster heater Backup heater Compressor 0 (default) Forced OFF Forced OFF Forced OFF 1 Permitted 2 Forced OFF Permitted 3 Permitted Only for RHVH/X: Do NOT use 1 or 3. [D‑00] Backup heater Compressor 0 (default) Forced OFF Forced OFF 2 Allowed Safety thermostat INFORMATION The preferential kWh rate power supply contact is connected to the same terminals (X5M/3+4) as the safety thermostat. It is only possible for the system to have EITHER preferential kWh rate power supply OR a safety thermostat. # Code Description [A.2.1.6] [D‑01] Connection to a safety thermostat voltage free contact: ▪ 0 (default): No safety thermostat. ▪ 3: Safety thermostat normal closed contact. Remark: 1+2 are related to preferential kWh rate power supply. Power saving function INFORMATION Only applicable for RRLQ004~008CAV3. Defines whether the outdoor unit power supply can be interrupted (internally by indoor unit control) during stand-still conditions (no space heating/cooling nor domestic hot water demand). The final decision to allow power interruption of the outdoor unit during standstill depends on the ambient temperature, compressor conditions and minimum internal timers. To enable the power saving function setting, [E‑08] needs to be enabled on the user interface in combination with the removal of the power saving connector at the outdoor unit. NOTICE The power saving connector at the outdoor unit shall only be removed when the main power supply to the application is switched OFF. In case of RRLQ004~008CAV3 3× 1 2 3

69 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 # Code Description N/A [E‑08] Power saving function for outdoor unit: ▪ 0: Disabled ▪ 1 (default): Enabled In case of RRLQ011~016CAV3 and RRLQ011~016CAW1 Do NOT change the default setting. # Code Description N/A [E-08] Power saving function for outdoor unit: ▪ 0 (default): Disabled ▪ 1: Enabled Power consumption control Only applicable for RHBH/X04+08 + RHVH/X04+08. See "5 Application guidelines" on page 10 for detailed information about this functionality. Pwr consumpt. control # Code Description [A.6.3.1] [4-08] Mode: ▪ 0 (No limitation)(default): Disabled. ▪ 1 (Continuous): Enabled: You can set one power limitation value (in A or kW) to which the system power consumption will be limited for all the time. ▪ 2 (Digital inputs): Enabled: You can set up to four different power limitation values (in A or kW) to which the system power consumption will be limited when the corresponding digital input asks. [A.6.3.2] [4-09] Type: ▪ 0 (Current): The limitation values are set in A. ▪ 1 (Power)(default): The limitation values are set in kW. [A.6.3.3] [5-05] Value: Only applicable in case of full time power limitation mode. 0 A~50 A, step: 1 A (default: 50 A) [A.6.3.4] [5-09] Value: Only applicable in case of full time power limitation mode. 0 kW~20 kW, step: 0.5 kW (default: 20 kW) Amp. limits for DI: Only applicable in case of power limitation mode based on digital inputs and based on current values. [A.6.3.5.1] [5-05] Limit DI1 0 A~50 A, step: 1 A (default: 50 A) [A.6.3.5.2] [5-06] Limit DI2 0 A~50 A, step: 1 A (default: 50 A) [A.6.3.5.3] [5-07] Limit DI3 0 A~50 A, step: 1 A (default: 50 A) [A.6.3.5.4] [5-08] Limit DI4 0 A~50 A, step: 1 A (default: 50 A) kW limits for DI: Only applicable in case of power limitation mode based on digital inputs and based on power values. [A.6.3.6.1] [5-09] Limit DI1 0 kW~20 kW, step: 0.5 kW (default: 20 kW) # Code Description [A.6.3.6.2] [5-0A] Limit DI2 0 kW~20 kW, step: 0.5 kW (default: 20 kW) [A.6.3.6.3] [5-0B] Limit DI3 0 kW~20 kW, step: 0.5 kW (default: 20 kW) [A.6.3.6.4] [5-0C] Limit DI4 0 kW~20 kW, step: 0.5 kW (default: 20 kW) Priority: Only applicable in case of an optional RKHW. [A.6.3.7] [4-01] Power consumption control DISABLED [4‑08]=0 ▪ 0 (None)(default): Backup heater and booster heater can operate simultaneously. ▪ 1 (BSH): The booster heater is prioritized. ▪ 2 (BUH): The backup heater is prioritized. Power consumption control ENABLED [4‑08]=1 or 2 ▪ 0 (None)(default): Depending on the power limitation level, the booster heater will be limited first, before the backup heater is limited. ▪ 1 (BSH): Depending on the power limitation level, the backup heater will be limited first, before the booster heater is limited. ▪ 2 (BUH): Depending on the power limitation level, the booster heater will be limited first, before the backup heater is limited. Note: In case of power consumption control is DISABLED (for all models) the setting [4‑01] defines whether backup heater and booster heater can operate simultaneously, or if the booster heater/ backup heater has priority over the backup heater/booster heater. In case of power consumption control is ENABLED (only for RHBH/ X04+08 and RHVH/X04+08), the setting [4‑01] defines the priority of the electrical heaters depending on applicable limitation. Average timer The average timer corrects the influence of ambient temperature variations. The weather-dependent set point calculation is done on the average outdoor temperature. The outdoor temperature is averaged over the selected time period. # Code Description [A.6.4] [1-0A] Outdoor average timer: ▪ 0: No averaging (default) ▪ 1: 12 hours ▪ 2: 24 hours ▪ 3: 48 hours ▪ 4: 72 hours INFORMATION If the power saving function is activated (see [E‑08]), the average outdoor temperature calculation is only possible in case the external outdoor temperature sensor is used. See "5.7  Setting up an external temperature sensor"  on page 22.

70 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Offset temperature external outdoor ambient sensor Only applicable in case of an external outdoor ambient sensor is installed and configured. You can calibrate the external outdoor ambient temperature sensor. It is possible to give an offset to the thermistor value. The setting can be used to compensate for situations where the external outdoor ambient sensor cannot be installed on the ideal installation location (see installation). # Code Description [A.6.5] [2‑0B] –5°C~5°C, step: 0.5°C (default: 0°C) Forced defrost You can manually start a defrost operation. The decision to execute the manual defrost operation is made by the outdoor unit and depends on ambient and heat exchanger conditions. When the outdoor unit accepted the forced defrost operation, will be displayed on the user interface. If is NOT displayed within 6  minutes after forced defrost operation was enabled, the outdoor unit ignored the forced defrost request. # Code Description [A.6.6] N/A Do you want to start a defrost operation? Pump operation When the pump operation function is disabled the pump will stop if the outdoor temperature is higher than the value set by [4‑02] or if the outdoor temperature drops below the value set by [F‑01]. When the pump operation is enabled, the pump operation is possible at all outdoor temperatures. # Code Description N/A [F‑00] Pump operation: ▪ 0: Disabled if outdoor temperature is higher than [4‑02] or lower than [F‑01] depending on heating/cooling operation mode. ▪ 1: Possible at all outdoor temperatures. Pump operation during flow abnormality [F‑09] defines whether the pump stops at flow abnormality or allow to continue operation when flow abnormality occurs. This functionality is only valid in specific conditions where it is preferable to keep the pump active when Ta<4°C (pump will be activated for 10 minutes and deactivated after 10 minutes). ROTEX shall NOT be held liable for any damage resulting this functionality. # Code Description N/A [F‑09] Pump continue operation when flow abnormality: ▪ 0: Pump will be deactivated. ▪ 1: Pump will be activated when Ta<4°C (10 minutes ON – 10 minutes OFF) Pump speed limitation Pump speed limitation [9‑0D] defines the maximum pump speed. In normal conditions, the default setting should NOT be modified. The pump speed limitation will be overruled when the flow rate is in the range of the minimum flow (error 7H). # Code Description N/A [9‑0D] Pump speed limitation ▪ 0: No limitation. ▪ 1~4: General limitation. There is limitation in all conditions. The required delta  T control and comfort are NOT guaranteed. ▪ 5~8 (default: 6): Limitation when no actuators. When there is no heating/ cooling output, the pump speed limitation is applicable. When there is heating/cooling output, the pump speed is only determined by delta T in relation to the required capacity. With this limitation range, delta T is possible and the comfort is guaranteed. The maximum values depend on the unit type: [9-0D]=0 [9-0D]=5 a (kPa) b (l/min) a (kPa) b (l/min) a (kPa) b (l/min) a (kPa) b (l/min) [9-0D]=6 [9-0D]=7 [9-0D]=8 a (kPa) b (l/min) a External static pressure b Water flow rate

71 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 8.4 Menu structure: Overview user settings < > [1] [2] [5] [6] [7] [2] [6.2] [6.3] [6.8] [7.1] [7.4] [7.3] [3] [4] Set time/date Date Time Daylight Saving Time Clock type Holiday Holiday Holiday Holiday Holiday mode Holiday mode Home Away From Until Until From Use day schedule Operation mode Heating Cooling Quiet mode Operation mode Select schedules Room temperature LWT main LWT additional Tank temperature Information Sensor information Energy metering Error handling User permission level Actuators Operation modes Running hours Version Energy metering Consumed elec. Produced energy Error information Error history Contact/helpdesk number Version User interface Indoor unit Outdoor unit User settings Display Temperature lock Set schedules Preset values Allowed operation mode Unit of measurement Display Contrast Backlit LCD time User profile Available home pages Set schedules Room temp. LWT main LWT additional DHW temp Booster heater permission Quiet mode DHW pump Preset values Room temperature LWT main Tank temperature Quiet level DHW Set weather dependent Warning history [7.7] Set weather dependent Main Additional [7.7.1] Main Set weather-dependent heating Set weather-dependent cooling [7.7.2] Additional Set weather-dependent heating Set weather-dependent cooling INFORMATION Depending on the selected installer settings, settings will be visible/invisible.

72 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 8.5 Menu structure: Overview installer settings [A] [A.2] [A.2.1] [A.2.2] [A.2.2.6] [A.3] [A.3.1] [A.3.1.1] [A.3.2] [A.3.3] [A.4] [A.4.4] [A.5] [A.5.1] [A.7] [A.6] [A.6.3] [A.6.2] Installer settings Language System layout Space operation Domestic hot water (DHW) Heat sources System operation Commissioning Overview settings System layout Standard Options Capacities Confirm layout Space operation LWT settings Room thermostat Operation range Domestic hot water Type Disinfection Maximum setpoint SP mode Weather-dependent curve Heat sources Backup heater System operation Auto restart Preferential kWh rate Pwr consumpt. control Averaging time Ext amb. sensor offset Forced defrost Commissioning Test run UFH screed dryout Air purge Actuator test run Standard Unit type Compressor type Indoor software type BUH type Backup heater steps Forced off contact Unit control method Number of LWT zones Pump operation mode Power saving possible User interface location Options DHW operation DHW tank type Contact type main Contact type add. Digital I/O PCB Demand PCB External kWh meter External kWh meter DHW pump External sensor Leaving water Main Additional Delta T source Room thermostat Room temp. range Room temp. offset Ext. room sensor offset Operation range Space heating OFF temp Space cooling On temp Disinfection Disinfection Operation day Start time Temperature target Duration Backup heater Operation mode Enable BUH step 2 Equilibrium temp. Prefer. kWh rate PS Allowed heaters Forced pump OFF Pwr consmp ctrl Mode Type Amp. value Amp. limits for DI kW value kW limits for DI Priority Digital I/O PCB Ext. backup heat src Solar kit Alarm output Bottom plate heater Main LWT setpoint mode Temperature range Modulated LWT Shut-off valve Emitter type [A.3.1.2] Additional LWT setpoint mode Temperature range Room temp. step [A.3.1.3] Delta T source Heating Cooling Emergency LAN adapter INFORMATION Solar kit settings are shown but are NOT applicable for this unit. Settings shall NOT be used or changed. INFORMATION Depending on the selected installer settings, settings will be visible/invisible.

73 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 9 Commissioning 9.1 Overview: Commissioning This chapter describes what you have to do and know to commission the system after it is configured. Typical workflow Commissioning typically consists of the following stages: 1 Checking the "Checklist before commissioning". 2 Performing an air purge. 3 Performing a test run for the system. 4 If necessary, performing a test run for one or more actuators. 5 If necessary, performing an underfloor heating screed dryout. 9.2 Precautions when commissioning INFORMATION During the first running period of the unit, the required power may be higher than stated on the nameplate of the unit. This phenomenon is caused by the compressor, that needs a continuous run time of 50 hours before reaching smooth operation and stable power consumption. NOTICE Before starting up the system, the unit MUST be energised for at least 2 hours. The crankcase heater needs to heat up the compressor oil to avoid oil shortage and compressor breakdown during startup. NOTICE NEVER operate the unit without thermistors and/or pressure sensors/switches. Burning of the compressor might result. NOTICE Do NOT operate the unit until the refrigerant piping is complete (when operated this way, the compressor will break). 9.3 Checklist before commissioning Do NOT operate the system before the following checks are OK: You read the complete installation instructions, as described in the installer reference guide. The indoor unit is properly mounted. The outdoor unit is properly mounted. The following field wiring has been carried out according to this document and the applicable legislation: ▪ Between the local supply panel and the outdoor unit ▪ Between indoor unit and outdoor unit ▪ Between the local supply panel and the indoor unit ▪ Between the indoor unit and the valves (if applicable) ▪ Between the indoor unit and the room thermostat (if applicable) ▪ Between the indoor unit and the domestic hot water tank (if applicable) ▪ Between the gas boiler and the local supply panel (only applicable in case of hybrid system) The system is properly earthed and the earth terminals are tightened. The fuses or locally installed protection devices are installed according to this document, and have not been bypassed. The power supply voltage matches the voltage on the identification label of the unit. There are NO loose connections or damaged electrical components in the switch box. There are NO damaged components or squeezed pipes on the inside of the indoor and outdoor units. Depending on the backup heater type, backup heater circuit breaker F1B on the switch box is turned ON. Only for tanks with built-in booster heater: The booster heater circuit breaker F2B on the switch box is turned ON. There are NO refrigerant leaks. The refrigerant pipes (gas and liquid) are thermally insulated. The correct pipe size is installed and the pipes are properly insulated. There is NO water leak inside the indoor unit. The shut-off valves are properly installed and fully open. The stop valves (gas and liquid) on the outdoor unit are fully open. The air purge valve is open (at least 2 turns). The pressure relief valve purges water when opened. The minimum water volume is guaranteed in all conditions. See "To check the water volume" in "6.4 Preparing water piping" on page 24. INFORMATION The software is equipped with an "installer-on-site" mode ([4‑0E]), that disables automatic operation by the unit. At first installation, setting [4‑0E] is by default set to "1", meaning automatic operation is disabled. All protective functions are then disabled. If the user interface home pages are off, the unit will NOT operate automatically. To enable automatic operation and the protective functions, set [4‑0E] to "0". 36 hours after the first power-on, the unit will automatically set [4‑0E] to "0", ending "installer-on-site" mode and enabling the protective functions. If – after first installation  – the installer returns to the site, the installer has to set [4‑0E] to "1" manually. 9.4 Checklist during commissioning The minimum flow rate during backup heater/defrost operation is guaranteed in all conditions. See "To check the water volume and flow rate" in "6.4  Preparing water piping" on page 24. To perform an air purge. To perform a test run. To perform an actuator test run. Underfloor screed dryout function The underfloor screed dryout function is started (if necessary).

74 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 9.4.1 To check the minimum flow rate 1 Confirm according to the hydraulic configuration which space heating loops can be closed due to mechanical, electronic, or other valves. 2 Close all space heating loops that can be closed (see previous step). 3 Start the pump test run operation (see "9.4.4  To perform an actuator test run" on page 75). 4 Go to [6.1.8]: > Information > Sensor information > Flow rate to check the flow rate. During pump test run operation, the unit can operate below this minimum required flow rate. Bypass valve foreseen? Yes No Modify the bypass valve setting to reach the minimum required flow rate + 2 l/min In case the actual flow rate is below the minimum flow rate, modifications at the hydraulic configuration are required. Increase the space heating loops that can NOT be closed or install a pressure‑controlled bypass valve. Minimum required flow rate during defrost/backup heater operation 04+08 models 12 l/min 11+16 models 15 l/min 9.4.2 Air purge function When commissioning and installing the unit, it is very important to remove all air in the water circuit. When the air purge function is running, the pump operates without actual operation of the unit and the removal of air in the water circuit will start. NOTICE Before starting the air purge, open the safety valve and check if the circuit is sufficiently filled with water. Only if water escapes the valve after opening it, you can start the air purge procedure. There are 2 modes for purging air: ▪ Manually: the unit will operate with a fixed pump speed and in a fixed or custom position of the 3-way valve. The custom position of the 3-way valve is a helpful feature to remove all air from the water circuit in the space heating or the domestic hot water heating mode. The operation speed of the pump (slow or quick) can also be set. ▪ Automatic: the unit automatically changes the pump speed and the position of the 3-way valve between the space heating or the domestic hot water heating mode. Typical workflow Purging the air from the system should consist of: 1 Performing a manual air purge 2 Performing an automatic air purge INFORMATION Start by performing a manual air purge. When almost all the air is removed, perform an automatic air purge. If necessary, repeat performing the automatic air purge until you are sure that all air is removed from the system. During air purge function, pump speed limitation [9‑0D] is NOT applicable. Make sure that the leaving water temperature home page, room temperature home page, and domestic hot water home page are turned OFF. The air purge function automatically stops after 30 minutes. To perform a manual air purge Prerequisite: Make sure that the leaving water temperature home page, room temperature home page, and domestic hot water home page are turned OFF. 1 Set the user permission level to Installer. See "To set the user permission level to Installer" on page 46. 2 Set the air purge mode: go to [A.7.3.1] > Installer settings > Commissioning > Air purge > Type. 3 Select Manual and press . 4 Go to [A.7.3.4] > Installer settings > Commissioning > Air purge > Start air purge and press to start the air purge function. Result: The manual air purge starts and the following screen appears. 01:18 Tue Air purge l/min Low SHC 0.5 Flow rate Speed Circuit Stop Adjust Scroll 5 Use the and buttons to scroll to Speed. 6 Use the and buttons to set the desired pump speed. Result: Low Result: High 7 If applicable, set the desired position of the 3-way valve (space heating/domestic hot water)(space heating/domestic hot water). Use the and buttons to scroll to Circuit. 8 Use the and buttons to set the desired position of the 3-way valve (space heating/domestic hot water). Result: SHC Result: Tank To perform an automatic air purge Prerequisite: Make sure that the leaving water temperature home page, room temperature home page, and domestic hot water home page are turned OFF. 1 Set the user permission level to Installer. See "To set the user permission level to Installer" on page 46. 2 Set the air purge mode: go to [A.7.3.1] > Installer settings > Commissioning > Air purge > Type. 3 Select Automatic and press . 4 Go to [A.7.3.4] > Installer settings > Commissioning > Air purge > Start air purge and press to start the air purge function. Result: Air purging will start and the following screen will be shown. 01:18 Tue Air purge l/min Low SHC 0.5 Flow rate Speed Circuit Stop Adjust Scroll To interrupt air purge 1 Press and press to confirm the interruption of the air purge function.

75 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 9.4.3 To perform a test run Prerequisite: Make sure that the leaving water temperature home page, room temperature home page, and domestic hot water home page are turned OFF. 1 Set the user permission level to Installer. See "To set the user permission level to Installer" on page 46. 2 Go to [A.7.1]: > Installer settings > Commissioning > Test run. 3 Select a test and press . Example: Heating. 4 Select OK and press . Result: The test run starts. It stops automatically when done (±30 min). To stop it manually, press , select OK and press . INFORMATION If 2 user interfaces are present, you can start a test run from both user interfaces. ▪ The user interface used to start the test run displays a status screen. ▪ The other user interface displays a "busy" screen. You cannot use the user interface as long as the "busy" screen is shown. If the installation of the unit has been done correctly, the unit will start up during test operation in the selected operation mode. During the test mode, the correct operation of the unit can be checked by monitoring leaving water temperature (heating/cooling mode) and tank temperature (domestic hot water mode). To monitor the temperature, go to [A.6] and select the information you want to check. 9.4.4 To perform an actuator test run Purpose of the actuator test run is to confirm the operation of the different actuators (e.g., when you select pump operation, a test run of the pump will start). Prerequisite: Make sure that the leaving water temperature home page, room temperature home page, and domestic hot water home page are turned OFF. 1 Set the user permission level to Installer. See "To set the user permission level to Installer" on page 46. 2 Make sure the room temperature control, the leaving water temperature control and the domestic hot water control are turned OFF via the user interface. 3 Go to [A.7.4]: > Installer settings > Commissioning > Actuator test run. 4 Select an actuator and press . Example: Pump. 5 Select OK and press . Result: The actuator test run starts. It automatically stops when finished. To stop it manually, press , select OK and press . Possible actuator test runs ▪ Booster heater test ▪ Backup heater (step 1) test ▪ Backup heater (step 2) test ▪ Pump test INFORMATION Make sure that all air is purged before executing the test run. Also avoid disturbances in the water circuit during the test run. ▪ 2-way valve test ▪ 3-way valve test ▪ Bottom plate heater test ▪ Bivalent signal test ▪ Alarm output test ▪ Cooling/heating signal test ▪ Quick heat-up test ▪ Circulation pump test 9.4.5 Underfloor heating screed dryout This function is used for drying out the screed of an underfloor heating system very slowly during the construction of a house. It allows the installer to program and execute this program. Make sure that the leaving water temperature home page, room temperature home page, and domestic hot water home page are turned OFF. This function can be executed without finishing the outdoor installation. In this case, the backup heater will perform the screed dryout and supply the leaving water without heat pump operation. When no outdoor unit is installed yet, then connect the main power supply cable to the indoor unit via X2M/30 and X2M/31. See "7.9.7 To connect the main power supply" on page 40. INFORMATION ▪ If Emergency is set to Manual ([A.6.C]=0), and the unit is triggered to start emergency operation, the user interface will ask confirmation before starting. The underfloor heating screed dryout function is active even if the user does NOT confirm emergency operation. ▪ During underfloor heating screed dryout, pump speed limitation [9‑0D] is NOT applicable. NOTICE The installer is responsible for: ▪ contacting the screed manufacturer for the initial heating instructions to avoid cracking the screed, ▪ programming the underfloor heating screed dryout schedule according to the above instruction of the screed manufacturer, ▪ checking the proper functioning of the setup on a regular basis, ▪ selecting the correct program complying with the type of the used screed of the floor. NOTICE To perform an underfloor heating screed dryout, room frost protection needs to be disabled ([2‑06]=0). By default, it is enabled ([2‑06]=1). However, due to the "installer-on-site" mode (see "Checklist before commissioning"), room frost protection will be automatically disabled for 36 hours after the first power-on. If the screed dryout still needs to be performed after the first 36 hours of power-on, manually disable room frost protection by setting [2‑06] to "0", and KEEP it disabled until the screed dryout has finished. Ignoring this notice will result in cracking of the screed.

Installer reference guide 76 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 NOTICE For the underfloor heating screed dryout to be able to start, make sure the following settings are met: ▪ [4‑00]=1 ▪ [C‑02]=0 ▪ [D‑01]=0 ▪ [4‑08]=0 ▪ [4‑01]≠1 The installer can program up to 20 steps. For each step he needs to enter: 1 the duration in hours, up to 72 hours, 2 the desired leaving water temperature. Example: t T A1 25°C (1) 35°C (2) 24h (1) 36h (2) T Desired leaving water temperature (15~55°C) t Duration (1~72 h) (1) Action step 1 (2) Action step 2 To program an underfloor heating screed dryout schedule 1 Set the user permission level to Installer. See "To set the user permission level to Installer" on page 46. 2 Go to [A.7.2]: > Installer settings > Commissioning > UFH screed dryout > Set dryout schedule. 3 Use the , , , and to program the schedule. ▪ Use and to scroll through the schedule. ▪ Use and to adjust the selection. If a time is selected, you can set the duration between 1 and 72 hours. If a temperature is selected, you can set the desired leaving water temperature between 15°C and 55°C. 4 To add a new step, select "–h" or "–" on an empty line and press . 5 To delete a step, set the duration to "–" by pressing . 6 Press to save the schedule. It is important that there is no empty step in the program. The schedule will stop when a blank step is programmed OR when 20 consecutive steps have been executed. To perform an underfloor heating screed dryout INFORMATION Preferential kWh rate power supply cannot be used in combination with underfloor heating screed dryout. Prerequisite: Make sure there is ONLY 1 user interface connected to your system to perform an underfloor heating screed dryout. Prerequisite: Make sure that the leaving water temperature home page, room temperature home page, and domestic hot water home page are turned OFF. 1 Go to [A.7.2]: > Installer settings > Commissioning > UFH screed dryout. 2 Set a dryout program. 3 Select Start dryout and press . 4 Select OK and press . Result: The underfloor heating screed dryout starts and following screen will be shown. It stops automatically when done. To stop it manually, press , select OK and press . 15:10 1 14d 12h 25°C Tue Screed dryout Current step Remaining Desired LWT Stop To readout the status of an underfloor heating screed dryout 1 Press . 2 The current step of the program, the total remaining time, and the current desired leaving water temperature will be displayed. INFORMATION There is limited access to the menu structure. Only the following menus can be accessed: ▪ Information. ▪ Installer settings > Commissioning > UFH screed dryout. To interrupt an underfloor heating screed dryout When the program is stopped by an error, an operation switch off, or a power failure, the U3 error will be displayed on the user interface. To resolve the error codes, see "12.4  Solving problems based on error codes"  on page  80. To reset the U3 error, your User permission level needs to be Installer. 1 Go to the underfloor heating screed dryout screen. 2 Press . 3 Press to interrupt the program. 4 Select OK and press . Result: The underfloor heating screed dryout program is stopped. When the program is stopped due to an error, an operation switch- off, or a power failure, you can read out the underfloor heating screed dryout status. 5 Go to [A.7.2]: > Installer settings > Commissioning > UFH screed dryout > Dryout status > Stopped at and followed by the last executed step. 6 Modify and restart the execution of the program. 10 Hand-over to the user Once the test run is finished and the unit operates properly, please make sure the following is clear for the user: ▪ Fill in the installer setting table (in the operation manual) with the actual settings. ▪ Make sure that the user has the printed documentation and ask him/her to keep it for future reference. Inform the user that he can find the complete documentation on the url as earlier described in this manual. ▪ Explain the user how to properly operate the system and what to do in case of problems. ▪ Show the user what to do in relation to maintaining the unit.

Installer reference guide 77 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 ▪ Explain the user about energy saving tips as described in the operation manual. 11 Maintenance and service NOTICE Maintenance must be done by an authorised installer or service agent. We recommend to do maintenance at least once a year. However, applicable legislation might require shorter maintenance intervals. NOTICE In Europe, the greenhouse gas emissions of the total refrigerant charge in the system (expressed as tonnes CO2-equivalent) is used to determine the maintenance intervals. Follow the applicable legislation. Formula to calculate the greenhouse gas emissions: GWP value of the refrigerant × Total refrigerant charge [in kg] / 1000 11.1 Overview: Maintenance and service This chapter contains information about: ▪ The yearly maintenance of the outdoor unit ▪ The yearly maintenance of the indoor unit 11.2 Maintenance safety precautions DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING NOTICE: Risk of electrostatic discharge Before performing any maintenance or service work, touch a metal part of the unit in order to eliminate static electricity and to protect the PCB. 11.2.1 Opening the indoor unit See "7.2.4  To open the switch box cover of the indoor unit"  on page 29. 11.3 Checklist for yearly maintenance of the outdoor unit Check the following at least once a year: ▪ Outdoor unit heat exchanger. The heat exchanger of the outdoor unit can get blocked up due to dust, dirt, leaves, etc. It is recommended to clean the heat exchanger yearly. A blocked heat exchanger can lead to too low pressure or too high pressure leading to worse performance. 11.4 Checklist for yearly maintenance of the indoor unit Check the following at least once a year: ▪ Water pressure ▪ Water filter ▪ Water pressure relief valve ▪ Pressure relief valve of the domestic hot water tank ▪ Switch box ▪ Booster heater of the domestic hot water tank Water pressure Check whether the water pressure is above 1 bar. If it is lower, add water. Water filter Clean the water filter. NOTICE Handle the water filter with care. Do NOT use excessive force when you reinsert the water filter so as NOT to damage the water filter mesh. 1 3 2 5 4 Water pressure relief valve Open the valve and check if it operates correctly. The water may be very hot! Checkpoints are: ▪ The water flow coming from the relief valve is high enough, no blockage of the valve or in between piping is suspected. ▪ Dirty water coming out of the relief valve: ▪ open the valve until the discharged water does NOT contain dirt anymore ▪ flush the system and install an additional water filter (a magnetic cyclone filter is preferable). To make sure this water originates from the tank, check after a tank heat up cycle. It is recommended to do this maintenance more frequently. Relief valve of the domestic hot water tank (field supply) Open the valve and check the correct operation. Water may be very hot! Checkpoints are: ▪ The water flow coming from the relief valve is high enough, no blockage of the valve or in between piping is suspected. ▪ Dirty water coming out of the relief valve: ▪ open the valve until the discharged water does not contain dirt anymore ▪ flush and clean the complete tank, including the piping between the relief valve and cold water inlet. To make sure this water originates from the tank, check after a tank heat up cycle. It is recommended to do this maintenance more frequently. Switch box ▪ Carry out a thorough visual inspection of the switch box and look for obvious defects such as loose connections or defective wiring.

78 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 ▪ Using an ohmmeter, check if contactors K1M, K2M, K3M and K5M (depending on your installation) operate correctly. All contacts of these contactors must be in open position when the power is turned OFF. WARNING If the internal wiring is damaged, it has to be replaced by the manufacturer, its service agent or similarly qualified persons. Booster heater of the domestic hot water tank INFORMATION Only for wall-mounted units equipped with a domestic hot water tank with a built-in electrical booster heater (RKHW). It is recommended to remove lime buildup on the booster heater to extend its life span, especially in regions with hard water. To do so, drain the domestic hot water tank, remove the booster heater from the domestic hot water tank and immerse in a bucket (or similar) with lime-removing product for 24 hours. 12 Troubleshooting 12.1 Overview: Troubleshooting This chapter describes what you have to do in case of problems. It contains information about: ▪ Solving problems based on symptoms ▪ Solving problems based on error codes Before troubleshooting Carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring. 12.2 Precautions when troubleshooting WARNING ▪ When carrying out an inspection on the switch box of the unit, always make sure that the unit is disconnected from the mains. Turn off the respective circuit breaker. ▪ When a safety device was activated, stop the unit and find out why the safety device was activated before resetting it. NEVER bridge safety devices or change their values to a value other than the factory default setting. If you are unable to find the cause of the problem, call your dealer. DANGER: RISK OF ELECTROCUTION WARNING Prevent hazard due to the inadvertent resetting of the thermal cut-out: this appliance must NOT be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly turned ON and OFF by the utility. DANGER: RISK OF BURNING 12.3 Solving problems based on symptoms 12.3.1 Symptom: The unit is NOT heating or cooling as expected Possible causes Corrective action The temperature setting is NOT correct Check the temperature setting on the remote controller. Refer to the operation manual. The water flow is too low Check and make sure that: ▪ All shut-off valves of the water circuit are completely open. ▪ The water filter is clean. Clean if necessary. ▪ There is no air in the system. Purge air if necessary. You can purge air manually (see "To perform a manual air purge" on page 74) or use the automatic air purge function (see "To perform an automatic air purge" on page 74). ▪ The water pressure is >1 bar. ▪ The expansion vessel is NOT broken. ▪ The resistance in the water circuit is NOT too high for the pump (see the ESP curve in the "Technical data" chapter). If the problem persists after you have conducted all of the above checks, contact your dealer. In some cases, it is normal that the unit decides to use a low water flow. The water volume in the installation is too low Make sure that the water volume in the installation is above the minimum required value (see "6.4.3 To check the water volume and flow rate" on page 25). 12.3.2 Symptom: The compressor does NOT start (space heating or domestic water heating) Possible causes Corrective action The unit must start up out of its operation range (the water temperature is too low) If the water temperature is too low, the unit uses the backup heater to reach the minimum water temperature first (15°C). Check and make sure that: ▪ The power supply to the backup heater is correctly wired. ▪ The backup heater thermal protector is NOT activated. ▪ The backup heater contactors are NOT broken. If the problem persists after you have conducted all of the above checks, contact your dealer.

79 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Possible causes Corrective action The preferential kWh rate power supply settings and electrical connections do NOT match This should match with the connections as explained in "6.5 Preparing electrical wiring" on page 27 and "7.9.7 To connect the main power supply" on page 40. The preferential kWh rate signal was sent by the electricity company Wait for the power to return (2 hours max.). 12.3.3 Symptom: The pump is making noise (cavitation) Possible causes Corrective action There is air in the system Purge air manually (see "To perform a manual air purge" on page 74) or use the automatic air purge function (see "To perform an automatic air purge" on page 74). The water pressure at the pump inlet is too low Check and make sure that: ▪ The water pressure is >1 bar. ▪ The manometer is not broken. ▪ The expansion vessel is NOT broken. ▪ The pre-pressure setting of the expansion vessel is correct (see "6.4.4  Changing the pre- pressure of the expansion vessel" on page 26). 12.3.4 Symptom: The pressure relief valve opens Possible causes Corrective action The expansion vessel is broken Replace the expansion vessel. The water volume in the installation is too high Make sure that the water volume in the installation is below the maximum allowed value (see "6.4.3 To check the water volume and flow rate" on page 25 and "6.4.4 Changing the pre-pressure of the expansion vessel" on page 26). The water circuit head is too high The water circuit head is the difference in height between the indoor unit and the highest point of the water circuit. If the indoor unit is located at the highest point of the installation, the installation height is considered 0 m. The maximum water circuit head is 10 m. Check the installation requirements. 12.3.5 Symptom: The water pressure relief valve leaks Possible causes Corrective action Dirt is blocking the water pressure relief valve outlet Check whether the pressure relief valve works correctly by turning the red knob on the valve counterclockwise: ▪ If you do NOT hear a clacking sound, contact your dealer. ▪ If the water keeps running out of the unit, close both the water inlet and outlet shut-off valves first and then contact your dealer. 12.3.6 Symptom: The space is NOT sufficiently heated at low outdoor temperatures Possible causes Corrective action The backup heater operation is not activated Check and make sure that: ▪ The backup heater operation mode is enabled. Go to: ▪ [A.5.1.1] > Installer settings > Heat sources > Backup heater > Operation mode [4‑00] ▪ The backup heater overcurrent fuse has not been turned off. If it has, check the fuse and turn it back on. ▪ The thermal protector of the backup heater has not been activated. If it has, check the following, and then press the reset button in the switch box: ▪ The water pressure ▪ Whether there is air in the system ▪ The air purge operation The backup heater equilibrium temperature has not been configured correctly Increase the "equilibrium temperature" to activate the backup heater operation at a higher outdoor temperature. Go to: ▪ [A.5.1.4] > Installer settings > Heat sources > Backup heater > Equilibrium temp. OR ▪ [A.8] > Installer settings > Overview settings [5‑01] There is air in the system. Purge air manually or automatically. See the air purge function in the "Commissioning" chapter.

80 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Possible causes Corrective action Too much heat pump capacity is used for heating domestic hot water (applies only to installations with a domestic hot water tank) Check and make sure that the "space heating priority" settings have been configured appropriately: ▪ Make sure that the "space heating priority status" has been enabled. Go to [A.8] > Installer settings > Overview settings [5‑02] ▪ Increase the "space heating priority temperature" to activate backup heater operation at a higher outdoor temperature. Go to [A.8] > Installer settings > Overview settings [5‑03] 12.3.7 Symptom: The pressure at the tapping point is temporarily unusually high Possible causes Corrective action Failing or blocked pressure relief valve. ▪ Flush and clean the complete tank including the piping between pressure relief valve and the cold water inlet. ▪ Replace the pressure relief valve. 12.3.8 Symptom: Decoration panels are pushed away due to a swollen tank Possible causes Corrective action Failing or blocked pressure relief valve. Contact your local dealer. 12.3.9 Symptom: Tank disinfection function is NOT completed correctly (AH-error) Possible causes Corrective action The disinfection function was interrupted by domestic hot water tapping Program the start-up of the disinfection function when the coming 4 hours NO domestic hot water tapping is expected. Large domestic hot water tapping happened recently before the programmed start-up of the disinfection function When the Domestic hot water > Type > Reheat or Reheat + sched. is selected, it is recommended to program the start-up the disinfection function at least 4 hours later than the last expected large hot water tapping. This start-up can be set by installer settings (disinfection function). When the Domestic hot water > Type > Scheduled only is selected, it is recommended to program a Storage eco 3 hours before the scheduled start-up of the disinfection function to preheat the tank. Possible causes Corrective action The disinfection operation was stopped manually: with the user interface displaying the DHW home page and its user permission level set to Installer, the button was pressed during disinfection operation. Do NOT press the button while the disinfection function is active. 12.4 Solving problems based on error codes When a problem happens, an error code appears on the user interface. It is important to understand the problem and to take countermeasure before resetting the error code. This should be done by a licensed installer or by your local dealer. This chapter gives you an overview of all error codes and the content of the error code as it appears on the user interface. For a more detailed troubleshooting guideline for each error, please see the service manual. 12.4.1 Error codes: Overview Error codes of the outdoor unit Error code Detailed error code Description A5 00 OU: High pressure cooling/Peak cut/ freeze protection problem. Please contact your dealer. E1 00 OU: PCB defect. Power reset required. Please contact your dealer. E3 00 OU: Actuation of high pressure switch (HPS). Please contact your dealer. E5 00 OU: Overheat of inverter compressor motor. Please contact your dealer. E6 00 OU: Compressor startup defect. Please contact your dealer. E7 00 OU: Malfunction of outdoor unit fan motor. Please contact your dealer. E8 00 OU: Power input overvoltage. Please contact your dealer. EA 00 OU: Cool/heat switchover problem. Please contact your dealer. H0 00 OU: Voltage/current sensor problem. Please contact your dealer. H3 00 OU: Malfunction of high pressure switch (HPS) Please contact your dealer.

81 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Error code Detailed error code Description H6 00 OU: Malfunction of position detection sensor. Please contact your dealer. H8 00 OU: Malfunction of compressor input (CT) system. Please contact your dealer. H9 00 OU: Malfunction of outdoor air thermistor. Please contact your dealer. F3 00 OU: Malfunction of discharge pipe temperature. Please contact your dealer. F6 00 OU: Abnormal high pressure in cooling. Please contact your dealer. FA 00 OU: Abnormal high pressure, actuation of HPS. Please contact your dealer. JA 00 OU: Malfunction of high pressure sensor. Please contact your dealer. J3 00 OU: Malfunction of discharge pipe thermistor. Please contact your dealer. J6 00 OU: Malfunction of heat exchanger thermistor. Please contact your dealer. L3 00 OU: Electrical box temperature rise problem. Please contact your dealer. L4 00 OU: Malfunction of inverter radiating fin temperature rise. Please contact your dealer. L5 00 OU: Inverter instantaneous overcurrent (DC). Please contact your dealer. P4 00 OU: Malfunction of radiating fin temperature sensor. Please contact your dealer. U0 00 OU: Shortage of refrigerant. Please contact your dealer. U2 00 OU: Defect of power supply voltage. Please contact your dealer. U7 00 OU: Transmission malfunction between main CPU- INV CPU. Please contact your dealer. Error code Detailed error code Description UA 00 OU: Indoor/outdoor combination problem. Power reset required. Error codes of the indoor unit Error code Detailed error code Description 7H 01 Water flow problem. 7H 04 Water flow problem during domestic hot water production. Manual reset. Check the domestic hot water circuit. 7H 05 Water flow problem during heating/sampling. Manual reset. Check the space heating/cooling circuit. 7H 06 Water flow problem during cooling/defrost. Manual reset. Check the plate heat exchanger. 80 00 Returning water temperature sensor problem. Please contact your dealer. 81 00 Leaving water temperature sensor problem. Please contact your dealer. 89 01 Heat exchanger frozen. 89 02 Heat exchanger frozen. 89 03 Heat exchanger frozen. 8F 00 Abnormal increase outlet water temperature (DHW). 8H 00 Abnormal increase outlet water temperature. 8H 03 Overheating water circuit (thermostat). A1 00 Zero cross detection problem. Power reset required. Please contact your dealer.

82 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Error code Detailed error code Description A1 01 EEPROM reading error. AA 01 Backup heater overheated. Power reset required. Please contact your dealer. AC 00 Booster heater overheated. Please contact your dealer. AH 00 Tank disinfection function not completed correctly. AJ 03 Too long DHW heat-up time required. C0 00 Flow sensor/switch malfunction. Please contact your dealer. C4 00 Heat exchanger temperature sensor problem. Please contact your dealer. CJ 02 Room temperature sensor problem. Please contact your dealer. EC 00 Abnormal increase tank temperature. H1 00 External temperature sensor problem. Please contact your dealer. HC 00 Tank temperature sensor problem. Please contact your dealer. U3 00 Under floor heating screed dryout function not completed correctly. U4 00 Indoor/outdoor unit communication problem. U5 00 User interface communication problem. U8 01 Connection with adapter lost Please contact your dealer. UA 00 Indoor unit, outdoor unit matching problem. Power reset required. Error code Detailed error code Description UA 17 Tank type problem INFORMATION In case of error code AH and no interruption of the disinfection function occurred due to domestic hot water tapping, following actions are recommended: ▪ When the Domestic hot water > Type > Reheat or Reheat + sched. is selected, it is recommended to program the start-up of the disinfection function at least 4  hours later than the last expected large hot water tapping. This start-up can be set by installer settings (disinfection function). ▪ When the Domestic hot water > Type > Scheduled only is selected, it is recommended to program a Storage eco 3  hours before the scheduled start-up of the disinfection function to preheat the tank. NOTICE When the minimum water flow is lower than described in the table below, the unit will temporarily stop operation and the user interface will display error 7H‑01. After some time, this error will reset automatically and the unit will resume operation. Minimum required flow during heat pump operation 04 models Heating 6 l/min Cooling 6 l/min 08 models Heating 6 l/min Cooling 10 l/min 11 models Heating 10 l/min Cooling 15 l/min 16 models Heating 10 l/min Cooling 15 l/min Minimum required flow during defrost operation 04+08 models 12 l/min 11+16 models 15 l/min Minimum required flow during backup heater operation All models 12 l/min If the 7H‑01 error persists, the unit will stop operation and the user interface will display an error code that needs to be reset manually. Depending on the problem, this error code is different: Error code Detailed error code Description 7H 04 The water flow problems mainly occurred during domestic hot water operation. Check the domestic hot water circuit. 7H 05 The water flow problems mainly occurred during space heating operation. Check the space heating circuit.

83 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Error code Detailed error code Description 7H 06 The water flow problems mainly occurred during cooling/defrost operation. Check the space heating/cooling circuit. Additionally, this error code might be an indication of frost damage to the plate heat exchanger. In that case, contact your local dealer. INFORMATION Error AJ-03 is reset automatically from the moment there is a normal tank heat-up. 13 Disposal NOTICE Do not try to dismantle the system yourself: the dismantling of the system, treatment of the refrigerant, oil and other parts must comply with applicable legislation. Units must be treated at a specialised treatment facility for reuse, recycling and recovery. 13.1 Overview: Disposal Typical workflow Disposing of the system typically consists of the following stages: 1 Pumping down the system. 2 Bringing the system to a specialized treatment facility. INFORMATION For more details, see the service manual. 13.2 To pump down Example: To protect the environment, pump down when relocating the unit or when disposing of the unit. DANGER: RISK OF EXPLOSION Pump down – Refrigerant leakage. If you want to pump down the system, and there is a leakage in the refrigerant circuit: ▪ Do NOT use the unit's automatic pump down function, with which you can collect all refrigerant from the system into the outdoor unit. Possible consequence: Self-combustion and explosion of the compressor because of air going into the operating compressor. ▪ Use a separate recovery system so that the unit's compressor does NOT have to operate. NOTICE During pump down operation, stop the compressor before removing the refrigerant piping. If the compressor is still running and the stop valve is open during pump down, air will be sucked into the system. Compressor breakage and other injury will be the result due to abnormal pressure in the refrigerant cycle. Pump down operation will extract all refrigerant from the system into the outdoor unit. 1 Remove the valve lid from the liquid stop valve and the gas stop valve. 2 Carry out the forced cooling operation. 3 After 5 to 10 minutes (after only 1 or 2 minutes in case of very low ambient temperatures (<−10°C)), close the liquid stop valve with a hexagonal wrench. 4 Check with the manifold if the vacuum is reached. 5 After 2-3  minutes, close the gas stop valve and stop forced cooling operation. a c b d d e a Gas stop valve b Closing direction c Hexagonal wrench d Valve lid e Liquid stop valve 13.3 To start and stop forced cooling Confirm that DIP switch SW2 is in COOL mode. 1 Press the forced cooling operation switch SW1 to begin forced cooling. 2 Press the forced cooling operation switch SW1 to stop forced cooling. SW1 HEAT COOL SW2 NOTICE Take care that while running forced cooling operation, the water temperature remains higher than 5°C (see temperature read out of the indoor unit). You can achieve this, for example, by activating all fans of the fan coil units.

Installer reference guide 84 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 14 Technical data 14.1 Piping diagram: Outdoor unit (6.4 CuT) (15.9 CuT) 7.9CuT 7.9CuT 7.9CuT 7.9CuT 7.9CuT 7.9CuT 7.9CuT 7.9CuT 12.7CuT 12.7CuT 7.9CuT 6.4CuT 12.7CuT 12.7CuT 12.7CuT 12.7CuT 6.4CuT 7.9CuT 7.9CuT 4.0CuT 4.0CuT 4.0CuT 4.0CuT 7.9CuT 7.9CuT 7.9CuT 6.4CuT 6.4CuT M P P > 6.4CuT 3TW60815-1 OUTDOOR UNIT OUTDOOR AIR TEMPERATURE THERMISTOR HEAT EXCHANGER HEAT EXCHANGER THERMISTOR CAPILLARY TUBE 1 CAPILLARY TUBE 2 CAPILLARY TUBE 3 CAPILLARY TUBE 4 REFRIGERANT FLOW COOLING HEATING FIELD PIPING FIELD PIPING LIQUID STOP VALVE GAS STOP VALVE WITH SERVICE PORT FILTER FILTER MOTOR OPERATED VALVE MUFFLER WITH FILTER PROPELLER FAN PRESSURE SENSOR MUFFLER WITH FILTER HIGH PRESSURE SWITCH MUFFLER MUFFLER DISCHARGE PIPE THERMISTOR COMPRESSOR ACCUMULATOR

Installer reference guide 85 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 14.2 Piping diagram: Indoor unit R2T R1T R3T R4T 3D088485 R4T R3T R2T R1T Water inlet Field installed Field installed Shut-off valve with drain/fill valve Refrigerant side Water outlet Pump Manometer Water side Shut-off valve with drain/fill valve Filter Plate heat exchanger Refrigerant inlet Refrigerant outlet Evaporator Condenser Refrigerant inlet Refrigerant outlet Backup heater Flow sensor Air purge Expansion vessel Check valve Flare connection Screw connection Flange connection Brazed connection Quick coupling LEGEND Pinched pipe Spinned pipe Thermistor Description Inlet water thermistor Refrigerant liquid side thermistor Outlet water backup heater thermistor Outlet water heat exchanger thermistor Safety valve

Installer reference guide 86 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 14.3 Wiring diagram: Outdoor unit See the internal wiring diagram supplied with the unit (on the inside of the top plate). The abbreviations used are listed below. C110~C112 Capacitor DB1, DB2, DB401 Rectifier bridge DC_N1, DC_N2 Connector DC_P1, DC_P2 Connector DCP1, DCP2, Connector DCM1, DCM2 Connector DP1, DP2 Connector E1, E2 Connector E1H Drain pan heater FU1~FU5 Fuse HL1, HL2, HL402 Connector HN1, HN2, HN402 Connector IPM1 Intelligent power module L Live LED 1~LED 4 Indication lamps LED A, LED B Pilot lamp M1C Compressor motor M1F Fan motor MR30, MR306, MR307, MR4 Magnetic relay MRM10, MRM20 Magnetic relay MR30_A, MR30_B Connector N Neutral PCB1 Printed circuit board (main) PCB2 Printed circuit board (inverter) PCB3 Printed circuit board (service) Q1DI Earth leakage circuit breaker Q1L Overload protector R1T Thermistor (discharge) R2T Thermistor (heat exchanger) R3T Thermistor (air) S1NPH Pressure sensor S1PH High pressure switch S2~S503 Connector SA1 Surge arrestor SHEET METAL Terminal strip on fixed plate SW1, SW3 Push buttons SW2, SW5 DIP switches U Connector V Connector V2, V3, V401 Varistor W Connector X11A, X12A Connector X1M, X2M Terminal strip Y1E Electronic expansion valve coil Y1R Reversing solenoid valve coil Z1C~Z4C Ferrite core Field wiring Terminal strip Connector Terminal Protective earth BLK Black BLU Blue BRN Brown GRN Green ORG Orange PPL Purple RED Red WHT White YLW Yellow 14.4 Wiring diagram: Indoor unit See the internal wiring diagram supplied with the unit (on the inside of the indoor unit switch box cover). The abbreviations used are listed below. Notes to go through before starting the unit English Translation Notes to go through before starting the unit Notes to go through before starting the unit X1M Main terminal X2M Field wiring terminal for AC X5M Field wiring terminal for DC X6M, X7M Backup heater terminal X4M Booster heater terminal Earth wiring 15 Wire number 15 Field supply **/12.2 Connection ** continues on page 12 column 2 1 Several wiring possibilities Option English Translation Not mounted in switch box Wiring depending on model PCB Backup heater configuration (only for *9W) Backup heater configuration (only for *9W)  3V3 (1N~, 230 V, 3 kW)  3V3 (1N~, 230 V, 3 kW)  6V3 (1N~, 230 V, 6 kW)  6V3 (1N~, 230 V, 6 kW)  6WN (3N~, 400 V, 6 kW)  6WN (3N~, 400 V, 6 kW)  9WN (3N~, 400 V, 9 kW)  9WN (3N~, 400 V, 9 kW)  6T1 (3~, 230 V, 6 kW)  6T1 (3~, 230 V, 6 kW) User installed options User installed options  Bottom plate heater  Bottom plate heater  Domestic hot water tank  Domestic hot water tank  Domestic hot water tank with solar connection  Domestic hot water tank with solar connection

Installer reference guide 87 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 English Translation  Remote user interface  Remote user interface  Ext. indoor thermistor  External indoor thermistor  Ext outdoor thermistor  External outdoor thermistor  Digital I/O PCB  Digital I/O PCB  Demand PCB  Demand PCB  Solar pump and control station  Solar pump and control station Main LWT Main leaving water temperature  On/OFF thermostat (wired)  On/OFF thermostat (wired)  On/OFF thermostat (wireless)  On/OFF thermostat (wireless)  Ext. thermistor  External thermistor  Heat pump convector  Heat pump convector Add LWT Additional leaving water temperature  On/OFF thermostat (wired)  On/OFF thermostat (wired)  On/OFF thermostat (wireless)  On/OFF thermostat (wireless)  Ext. thermistor  External thermistor  Heat pump convector  Heat pump convector Position in switch box English Translation Position in switch box Position in switch box Legend A1P Main PCB A2P User interface PCB A3P * Solar pump station PCB A3P * On/OFF thermostat (PC=power circuit) A3P * Heat pump convector A4P * Digital I/O PCB A4P * Receiver PCB (Wireless On/OFF thermostat) A5P Anode driver PCB A8P * Demand PCB B1L Flow sensor BSK (A3P) * Solar pump station relay DS1 (A8P) * DIP switch E1A Electrical anode E1H Backup heater element (1 kW) E2H Backup heater element (2 kW) E3H Backup heater element (3 kW) E4H * Booster heater (3 kW) F1B Overcurrent fuse backup heater F2B * Overcurrent fuse booster heater F1T Thermal fuse backup heater F1U, F2U (A4P) * Fuse 5 A 250 V for digital I/O PCB FU1 (A1P) Fuse T 6.3 A 250 V for PCB K1M, K2M Contactor backup heater K3M * Contactor booster heater K5M Safety contactor backup heater (only for *9W) K*R (A1P, A4P) Relay on PCB M1P Main supply pump M2P # Domestic hot water pump M2S # 2-way valve for cooling mode M3S (*) 3-way valve for floor heating/domestic hot water PC (A4P) Power circuit PHC1 (A4P) * Optocoupler input circuit Q*DI # Earth leakage circuit breaker Q1L Thermal protector backup heater Q2L * Thermal protector booster heater R1H (A3P) * Humidity sensor R1T (A1P) Outlet water heat exchanger thermistor R1T (A2P) Ambient sensor user interface R1T (A3P) * Ambient sensor On/OFF thermostat R2T (A1P) Outlet backup heater thermistor R2T (A3P) * External sensor (floor or ambient) R3T Refrigerant liquid side thermistor R4T Inlet water thermistor R5T (*) Domestic hot water thermistor R6T * External indoor or outdoor ambient thermistor S1S # Preferential kWh rate power supply contact S2S # Electrical meter pulse input 1 S3S # Electrical meter pulse input 2 S4S # Safety thermostat S6S~S9S # Digital power limitation inputs SS1 (A4P) * Selector switch TR1 Power supply transformer CN1-2, X*A X1H, X*Y Connector X*M Terminal strip *: Optional (*): Optional for RHBH/X #: Field supply Colours BLK Black BRN Brown GRY Grey RED Red Translation of text on wiring diagram English Translation (1) Main power connection (1) Main power connection For preferential kWh rate power supply For preferential kWh rate power supply Indoor unit supplied from outdoor Indoor unit supplied from outdoor Normal kWh rate power supply Normal kWh rate power supply Only for normal power supply (standard) Only for normal power supply (standard) Only for preferential kWh rate power supply (outdoor) Only for preferential kWh rate power supply (outdoor) Outdoor unit Outdoor unit Preferential kWh rate power supply contact: 16 V DC detection (voltage supplied by PCB) Preferential kWh rate power supply contact: 16 V DC detection (voltage supplied by PCB) Use normal kWh rate power supply for indoor unit Use normal kWh rate power supply for indoor unit (2) Backup heater power supply (2) Backup heater power supply Only for *** Only for ***

Installer reference guide 88 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 English Translation (3) User interface (3) User interface Only for remote user interface option Only for remote user interface option Switch box Switch box (4) Domestic hot water tanks (4) Domestic hot water tanks 3 wire type SPST 3 wire type SPST Booster heater power supply Booster heater power supply Only for *** Only for *** Only for wall-mounted models Only for wall-mounted models Switch box Switch box (5) Ext. thermistor (5) External thermistor Switch box Switch box (6) Field supplied options (6) Field supplied options 12 V DC pulse detection (voltage supplied by PCB) 12 V DC pulse detection (voltage supplied by PCB) 230 V AC supplied by PCB 230 V AC supplied by PCB Continuous Continuous current DHW pump output Domestic hot water pump output DHW pump Domestic hot water pump Electrical meters Electrical meters For safety thermostat For safety thermostat Inrush Inrush current Max. load Maximum load Normally closed Normally closed Normally open Normally open Safety thermostat contact: 16 V DC detection (voltage supplied by PCB) Safety thermostat contact: 16 V DC detection (voltage supplied by PCB) Shut-off valve Shut-off valve SWB Switch box (7) Option PCBs (7) Option PCBs Alarm output Alarm output English Translation Changeover to ext. heat source Changeover to external heat source If no bottom plate heater If no bottom plate heater Max. load Maximum load Min. load Minimum load Only for bottom plate heater Only for bottom plate heater Only for demand PCB option Only for demand PCB option Only for digital I/O PCB option Only for digital I/O PCB option Only for solar pump station Only for solar pump station Options: bottom plate heater OR On/OFF output Options: bottom plate heater OR On/OFF output Options: ext. heat source output, solar pump connection, alarm output Options: external heat source output, solar pump connection, alarm output Outdoor unit Outdoor unit Power limitation digital inputs: 12 V DC / 12 mA detection (voltage supplied by PCB) Power limitation digital inputs: 12 V DC / 12 mA detection (voltage supplied by PCB) Refer to operation manual Refer to operation manual Solar pump connection Solar pump connection Space C/H On/OFF output Space cooling/heating On/OFF output Switch box Switch box To bottom plate heater To bottom plate heater (8) External On/OFF thermostats and heat pump convector (8) External On/OFF thermostats and heat pump convector Additional LWT zone Additional leaving water temperature zone Main LWT zone Main leaving water temperature zone Only for external sensor (floor/ ambient) Only for external sensor (floor or ambient) Only for heat pump convector Only for heat pump convector Only for wired thermostat Only for wired thermostat Only for wireless thermostat Only for wireless thermostat

Installer reference guide 89 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 Electrical connection diagram For more details, please check the unit wiring. X1Y: 1-2 X1M: 1-2-3 A4P:Y2 X2M:29 2x0.75 X2M: 30-31 X5M: 3-4 1 1 F1B: L1-L2-L3 Q*L X6M X8M 5Gx2.5 230 V X2M: 13-14 X9A (PCB A1P) 230 V A4P: X4 X2M: 28 230 V SPST: X2M: 8-9-10 A4P: Y1 X2M: 28 A4P: Y3 X2M: 29 A4P: X1-X2 A3P: X1M: C-com-H A4P: X1M: H-C-com X2M: L-N A3P: X1M: 1-3 R2T 230 V X2M: 32-33 X11M: 3-4-5-6 X5M: 1-2 2x0.75 2x0.75 X2M: 34-35 X5M: 5-6 X5M: 7-8 X5M: 9-10 230 V A8P: X801M: 1-5 230 V A8P: X801M: 2-5 230 V A8P: X801M: 3-5 230 V A8P: X801M: 4-5 A4P: Y2 X2M: 29 Q*L X5M 230 V 2way valve F2B X7M 3 3 3 4D090420 A 2 2 X1M: 1-2-3 230 V 230 V 230 V 230 V 230 V 2 core 3 core 5 or 3 core normal kWh rate power supply for indoor unit: 230 V unit preferential kWh rate power supply 400 V or 230 V + earth: Only for preferential kWh rate power supply installation Only for normal power supply installation 5 or 3 core unit power supply: 400 V or 230 V + earth Field supply Indoor Unit Outdoor unit Standard part Optional parts (*KHW*) Power supply Preferential kWh rate power supply contact Field supply Safety thermostat booster heater power supply (3 kW): 230 V + earth backup heater power supply (3/6/9 kW): 400 V or 230 V + earth X1M: L1-L2-L3-N-earth or L-N-earth Only for *KBPHT* & depending on model Bottom plate heater F2B: L-N + earth or L-N + earth On/OFF output Cooling/heating Changeover to ext. heat source output Solar input Alarm output 2 core 3 core main: X2M: 1-4 add: X2M: 1a-4 main: X2M: 1-2-3-4 add: X2M: 1a-2a-3-4 main: X2M: 1-2-4 add: X2M: 1a-2a-4 NC valve: X2M: 5-7 NO valve: X2M: 6-7 2 core 2 core 2 core 2 core 2 core 2 core signal 5 core 3 core 4 or 3 core Domestic hot water tank clixon R5T - thermistor water temperature Q2L - clixon booster heater Booster heater clixon Only for *KHWSU*V3 Only for *KRP1AHTA Only for *KSOLHWAV1 X4M: 1-2-earth Power limitation demand input 4 Power limitation demand input 3 Power limitation demand input 2 Power limitation demand input 1 solar pump 4 core for H only operation 5 core for C/H operation 2 core for H only operation 3 core for C/H operation communication 2 core 4 core Notes: - In case of signal cable: keep minimum distance to power cables > 5 cm - Available heaters depending on model: see combination table 3way valve M3S (when *KHW is installed) selection domestic hot water-floor heating Only for *KRUCBL* A2P: P1-P2 user interface A2P: P1-P2 user interface Standard part Optional part External room thermostat / Heat pump convector (main and/or additional zone) Optional part Only for (heat pump convector) Only for *KRTR (wireless room thermostat) Only for *KRTW (wired room thermostat) External sensor (floor or ambient) Only for *KRTETS 2 core (3m included) signal Electricity meter pulse input 2 Electricity meter pulse input 1 Circulation pump for DHW M2S (*KHBX units) for cooling mode Ext. heat source (eg boiler) BSK: 1-2 solar interlock alarm indication Cooling/heating On/OFF output 2way valve 2 core 2 core signal 2 core signal 230 V 2 core 2 core 2 core signal 2 core 2 core 2 core Only for *KSR3PA option Only for *KRP1HB* & *KSOLHWAV1 Field supply external thermistor (indoor or outdoor) Only for KRCS01-1 or EKRSCA1 230 V 230 V communication 2 core

Installer reference guide 90 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 14.5 Drain pan necessity 4D078990 1. Refer to psychometric chart for more information. 2. If condensation is expected, installation of EKHBDPCA2 - drainpan kit must be considered. Entering water temperature limit to prevent condensation Entering water temperature [°C] Entering water temperature [°C] Dry bulb temperature [°C] Relative humidity 40% Relative humidity 60% Relative humidity 80% Example: With ambient temperature of 25°C and relative humidity of 40%. If entering water temperature is below 12°C, condensation on water piping will happen.

91 RRLQ004~008CA + RHBH/X04+08CB ROTEX HPSU low temperature Bi‑bloc 4P384979-1C – 2017.04 14.6 ESP curve: Indoor unit Note: A flow error will occur when the minimum water flow rate is not reached. EHBH/X04=RHBH/X04 70 60 50 40 30 20 10 0 0 5 10 15 20 25 30 A (kPa) B (l/min) C 4D090624-1A EHBH/X08=RHBH/X08 70 80 60 50 40 30 20 10 0 0 5 10 15 20 25 30 35 A (kPa) B (l/min) C 4D090624-1A A External static pressure B Water flow rate C Operation range Operation area is extended to lower flow rates only in case the unit operates with heat pump only. (Not in startup, no backup heater operation, no defrost operation). ESP=External static pressure [kPa] in the space heating/cooling circuit. Flow=Water flow through the unit in the space heating/cooling circuit. Notes: ▪ Selecting a flow outside the area of operation can cause damage or malfunction of the unit. See also the minimum and maximum allowed water flow range in the technical specifications. ▪ Water quality MUST be according to EN directive EC98/83EC. 15 Glossary Dealer Sales distributor for the product. Authorized installer Technical skilled person who is qualified to install the product. User Person who is owner of the product and/or operates the product. Applicable legislation All international, European, national and local directives, laws, regulations and/or codes that are relevant and applicable for a certain product or domain. Service company Qualified company which can perform or coordinate the required service to the product. Installation manual Instruction manual specified for a certain product or application, explaining how to install, configure and maintain it. Operation manual Instruction manual specified for a certain product or application, explaining how to operate it. Maintenance instructions Instruction manual specified for a certain product or application, which explains (if relevant) how to install, configure, operate and/or maintain the product or application. Accessories Labels, manuals, information sheets and equipment that are delivered with the product and that need to be installed according to the instructions in the accompanying documentation. Optional equipment Equipment made or approved by ROTEX that can be combined with the product according to the instructions in the accompanying documentation. Field supply Equipment not made by ROTEX that can be combined with the product according to the instructions in the accompanying documentation.

[6.8.2] = .... ID66F2 Applicable indoor units *HBH04CB3V *HVH04S18CB3V *HBH08CB3V *HVH08S18CB3V *HBH11CB3V *HVH11S18CB3V *HBH16CB3V *HVH16S18CB3V *HBX04CB3V *HVX04S18CB3V *HBX08CB3V *HVX08S18CB3V *HBX11CB3V *HVX11S18CB3V *HBX16CB3V *HVX16S18CB3V *HBH08CB9W *HVH08S26CB9W *HBH11CB9W *HVH11S26CB9W *HBH16CB9W *HVH16S26CB9W *HBX08CB9W *HVX08S26CB9W *HBX11CB9W *HVX11S26CB9W *HBX16CB9W *HVX16S26CB9W Notes (*1) *HB* (*2) *HV* (*3) *3V (*4) *9W (*5) *04/08* (*6) *11/16* 4P383508-1B - 2017.04

└─ Room temperature 7.4.1.1 R/W [3-07]~[3-06], step: A.3.2.4 21°C 7.4.1.2 R/W [3-07]~[3-06], step: A.3.2.4 19°C 7.4.1.3 R/W [3-08]~[3-09], step: A.3.2.4 24°C 7.4.1.4 R/W [3-08]~[3-09], step: A.3.2.4 26°C └─ LWT main 7.4.2.1 [8-09] R/W [9-01]~[9-00], step: 1°C 35°C 7.4.2.2 [8-0A] R/W [9-01]~[9-00], step: 1°C 33°C 7.4.2.3 [8-07] R/W [9-03]~[9-02], step: 1°C 18°C 7.4.2.4 [8-08] R/W [9-03]~[9-02], step: 1°C 20°C 7.4.2.5 R/W -10~10°C, step: 1°C 0°C 7.4.2.6 R/W -10~10°C, step: 1°C -2°C 7.4.2.7 R/W -10~10°C, step: 1°C 0°C 7.4.2.8 R/W -10~10°C, step: 1°C 2°C └─ Tank temperature 7.4.3.1 [6-0A] R/W 30~[6-0E]°C, step: 1°C 60°C 7.4.3.2 [6-0B] R/W 30~min(50, [6-0E])°C, step: 1°C 45°C 7.4.3.3 [6-0C] R/W 30~min(50, [6-0E])°C, step: 1°C 45°C └─ Quiet level 7.4.4 R/W 0: Level 1 (*6) 1: Level 2 (*5) 2: Level 3 └─ Electricity price 7.4.5.1 [C-0C] [D-0C] R/W 0,00~990/kWh 0/kWh 7.4.5.2 [C-0D] [D-0D] R/W 0,00~990/kWh 0/kWh 7.4.5.3 [C-0E] [D-0E] R/W 0,00~990/kWh 0/kWh └─ Fuel price 7.4.6 R/W 0,00~990/kWh 0,00~290/MBtu 8,0/kWh └─ Set weather dependent └─ Main └────────────────── Set weather-dependent heating 7.7.1.1 [1-00] Set weather-dependent heating Low ambient temp. for LWT main zone heating WD curve. R/W -40~5°C, step: 1°C -10°C 7.7.1.1 [1-01] Set weather-dependent heating High ambient temp. for LWT main zone heating WD curve. R/W 10~25°C, step: 1°C 15°C 7.7.1.1 [1-02] Set weather-dependent heating Leaving water value for low ambient temp. for LWT main zone heating WD curve. R/W [9-01]~[9-00]°C, step: 1°C 35°C 7.7.1.1 [1-03] Set weather-dependent heating Leaving water value for high ambient temp. for LWT main zone heating WD curve. R/W [9-01]~min(45, [9-00])°C , step: 1°C 25°C └────────────────── Set weather-dependent cooling 7.7.1.2 [1-06] Set weather-dependent cooling Low ambient temp. for LWT main zone cooling WD curve. R/W 10~25°C, step: 1°C 20°C 7.7.1.2 [1-07] Set weather-dependent cooling High ambient temp. for LWT main zone cooling WD curve. R/W 25~43°C, step: 1°C 35°C 7.7.1.2 [1-08] Set weather-dependent cooling Leaving water value for low ambient temp. for LWT main zone cooling WD curve. R/W [9-03]~[9-02]°C, step: 1°C 22°C 7.7.1.2 [1-09] Set weather-dependent cooling Leaving water value for high ambient temp. for LWT main zone cooling WD curve. R/W [9-03]~[9-02]°C, step: 1°C 18°C └─ Additional └────────────────── Set weather-dependent heating 7.7.2.1 [0-00] Set weather-dependent heating Leaving water value for high ambient temp. for LWT add zone heating WD curve. R/W [9-05]~min(45,[9-06])°C, step: 1°C 35°C 7.7.2.1 [0-01] Set weather-dependent heating Leaving water value for low ambient temp. for LWT add zone heating WD curve. R/W [9-05]~[9-06]°C, step: 1°C 45°C 7.7.2.1 [0-02] Set weather-dependent heating High ambient temp. for LWT add zone heating WD curve. R/W 10~25°C, step: 1°C 15°C 7.7.2.1 [0-03] Set weather-dependent heating Low ambient temp. for LWT add zone heating WD curve. R/W -40~5°C, step: 1°C -10°C └────────────────── Set weather-dependent cooling 7.7.2.2 [0-04] Set weather-dependent cooling Leaving water value for high ambient temp. for LWT add zone cooling WD curve. R/W [9-07]~[9-08]°C, step: 1°C 8°C 7.7.2.2 [0-05] Set weather-dependent cooling Leaving water value for low ambient temp. for LWT add zone cooling WD curve. R/W [9-07]~[9-08]°C, step: 1°C 12°C 7.7.2.2 [0-06] Set weather-dependent cooling High ambient temp. for LWT add zone cooling WD curve. R/W 25~43°C, step: 1°C 35°C 7.7.2.2 [0-07] Set weather-dependent cooling Low ambient temp. for LWT add zone cooling WD curve. R/W 10~25°C, step: 1°C 20°C Installer settings └─ System layout └─ Standard A.2.1.1 [E-00] R/O 0~5 0: LT split A.2.1.2 [E-01] R/O 0: 8 1: 16 A.2.1.3 [E-02] R/O 0: Type 1 1: Type 2 A.2.1.4 [E-03] R/O 0: No BUH 1: 1 step 2: 2 steps Indoor software type Backup heater steps High Medium Low Unit type Compressor type Comfort (cooling) Eco (cooling) Storage comfort Storage eco Reheat Comfort (heating) Eco (heating) Comfort (cooling) Eco (cooling) Comfort (heating) Eco (heating) Field settings table Installer setting at variance with default value Comfort (heating) Eco (heating) Comfort (cooling) Eco (cooling) 4P383508-1B - 2017.04 (*1) *HB*_(*2) *HV*_ (*3) *3V_(*4) *9W_ (*5) *04/08*_ (*6) *11/16*

Installer setting at variance with default value A.2.1.5 [5-0D] R/W 0: 1P,(1/2) 1: 1P,(1/1+2) (*3) 2: 3P,(1/2) 3: 3P,(1/1+2) 4: 3PN,(1/2) 5: 3PN,(1/1+2) (*4) A.2.1.6 [D-01] R/W 0: No 1: Open tariff 2: Closed tariff 3: Thermostat A.2.1.7 [C-07] R/W 0: LWT control 1: Ext RT control 2: RT control A.2.1.8 [7-02] R/W 0: 1 LWT zone 1: 2 LWT zones A.2.1.9 [F-0D] R/W 0: Continuous 1: Sample 2: Request A.2.1.A [E-04] R/O 0: No 1: Yes A.2.1.B R/W 0: At unit 1: In room └─ Options A.2.2.1 [E-05] R/W 0: No (*1) 1: Yes (*2) A.2.2.3 [E-07] R/W 0~6 0: Type 1 (*1) 1: Type 2 (*2) A.2.2.4 [C-05] R/W 1: Thermo ON/OFF 2: C/H request A.2.2.5 [C-06] R/W 1: Thermo ON/OFF 2: C/H request A.2.2.6.1 [C-02] Digital I/O PCB Ext. backup heat src R/W 0: No 1: Bivalent 2: - 3: - A.2.2.6.2 [D-07] Digital I/O PCB Solar kit R/W 0: No 1: Yes A.2.2.6.3 [C-09] Digital I/O PCB Alarm output R/W 0: Normally open 1: Normally closed A.2.2.6.4 [F-04] Digital I/O PCB Bottom plate heater R/W 0: No 1: Yes A.2.2.7 [D-04] R/W 0: No 1: Pwr consmp ctrl A.2.2.8 [D-08] R/W 0: No 1: 0,1 pulse/kWh 2: 1 pulse/kWh 3: 10 pulse/kWh 4: 100 pulse/kWh 5: 1000 pulse/kWh A.2.2.9 [D-09] R/W 0: No 1: 0,1 pulse/kWh 2: 1 pulse/kWh 3: 10 pulse/kWh 4: 100 pulse/kWh 5: 1000 pulse/kWh A.2.2.A [D-02] R/W 0~4 0: No 1: Secondary rtrn 2: Disinf. shunt A.2.2.B [C-08] R/W 0: No 1: Outdoor sensor 2: Room sensor └─ Capacities A.2.3.1 [6-02] R/W 0~10kW, step: 0,2kW 3kW (*1) 0kW (*2) A.2.3.2 [6-03] R/W 0~10kW, step: 0,2kW 3kW A.2.3.3 [6-04] R/W 0~10kW, step: 0,2kW 0kW (*3) 6kW (*4) A.2.3.6 [6-07] R/W 0~200W, step: 10W 0W └─ Space operation └─ LWT settings └────────────────── Main A.3.1.1.1 R/W 0: Fixed 1: Weather dep. 2: Fixed + scheduled 3: WD + scheduled A.3.1.1.2.1 [9-01] Temperature range Minimum temp (heating) R/W 15~37°C, step: 1°C 25°C A.3.1.1.2.2 [9-00] Temperature range Maximum temp (heating) R/W 37~depending on outdoor unit, step: 1°C 55°C A.3.1.1.2.3 [9-03] Temperature range Minimum temp (cooling) R/W 5~18°C, step: 1°C 5°C A.3.1.1.2.4 [9-02] Temperature range Maximum temp (cooling) R/W 18~22°C, step: 1°C 22°C A.3.1.1.5 [8-05] R/W 0: No 1: Yes A.3.1.1.6.1 [F-0B] Shut-off valve Thermo On/OFF R/W 0: No 1: Yes A.3.1.1.6.2 [F-0C] Shut-off valve Cooling R/W 0: No 1: Yes A.3.1.1.7 [9-0B] R/W 0: Quick 1: Slow └────────────────── Additional A.3.1.2.1 R/W 0: Fixed 1: Weather dep. 2: Fixed + scheduled 3: WD + scheduled Forced off contact Emitter type LWT setpoint mode Booster heater BUH: step 1 BUH: step 2 Bottom plate heater LWT setpoint mode Modulated LWT Contact type add. Demand PCB External kWh meter 1 External kWh meter 2 DHW pump External sensor Pump operation mode Power saving possible User interface location DHW operation DHW tank type Contact type main BUH type Unit control method Number of LWT zones (*1) *HB*_(*2) *HV*_ (*3) *3V_(*4) *9W_ (*5) *04/08*_ (*6) *11/16* 4P383508-1B - 2017.04

Installer setting at variance with default value A.3.1.2.2.1 [9-05] Temperature range Minimum temp (heating) R/W 15~37°C, step: 1°C 25°C A.3.1.2.2.2 [9-06] Temperature range Maximum temp (heating) R/W 37~depending on outdoor unit, step: 1°C 55°C A.3.1.2.2.3 [9-07] Temperature range Minimum temp (cooling) R/W 5~18°C, step: 1°C 5°C A.3.1.2.2.4 [9-08] Temperature range Maximum temp (cooling) R/W 18~22°C, step: 1°C 22°C └────────────────── Delta T source A.3.1.3.1 [9-09] R/W 3~10°C, step: 1°C 5°C A.3.1.3.2 [9-0A] R/W 3~10°C, step: 1°C 5°C └─ Room thermostat A.3.2.1.1 [3-07] Room temp. range Minimum temp (heating) R/W 12~18°C, step: A.3.2.4 12°C A.3.2.1.2 [3-06] Room temp. range Maximum temp (heating) R/W 18~30°C, step: A.3.2.4 30°C A.3.2.1.3 [3-09] Room temp. range Minimum temp (cooling) R/W 15~25°C, step: A.3.2.4 15°C A.3.2.1.4 [3-08] Room temp. range Maximum temp (cooling) R/W 25~35°C, step: A.3.2.4 35°C A.3.2.2 [2-0A] R/W -5~5°C, step: 0,5°C 0°C A.3.2.3 [2-09] R/W -5~5°C, step: 0,5°C 0°C A.3.2.4 R/W 0: 0,5 °C 1: 1 °C └─ Operation range 14~35°C, step: 1°C 25°C (*5) 14~35°C, step: 1°C 35°C (*6) A.3.3.2 [F-01] R/W 10~35°C, step: 1°C 20°C └─ Domestic hot water (DHW) └─ Type A.4.1 [6-0D] R/W 0: Reheat only 1: Reheat + sched. 2: Scheduled only └─ Disinfection A.4.4.1 [2-01] R/W 0: No 1: Yes A.4.4.2 [2-00] R/W 0: Each day 1: Monday 2: Tuesday 3: Wednesday 4: Thursday 5: Friday 6: Saturday 7: Sunday A.4.4.3 [2-02] R/W 0~23 hour, step: 1 hour 23 A.4.4.4 [2-03] R/W [E-07]≠1 : 55~80°C, step: 5°C 70°C [E-07]=1 : 60°C 60°C A.4.4.5 [2-04] R/W [E-07]≠1 : 5~60 min, step: 5 min 10 min [E-07]=1 : 40~60 min, step: 5 min 40 min └─ Maximum setpoint A.4.5 [6-0E] R/W [E-07]≠1 : 40~80°C, step: 1°C 60°C [E-07]=1 : 40~60°C, step: 1°C 60°C └─ SP mode A.4.6 R/W 0: Fixed 1: Weather dep. └─ Weather dependent curve A.4.7 [0-0B] Weather-dependent curve Leaving water value for high ambient temp. for DHW WD curve. R/W 35~[6-0E]°C, step: 1°C 55°C A.4.7 [0-0C] Weather-dependent curve Leaving water value for low ambient temp. for DHW WD curve. R/W 45~[6-0E]°C, step: 1°C 60°C A.4.7 [0-0D] Weather-dependent curve High ambient temp. for DHW WD curve. R/W 10~25°C, step: 1°C 15°C A.4.7 [0-0E] Weather-dependent curve Low ambient temp. for DHW WD curve. R/W -40~5°C, step: 1°C -10°C └─ Heat sources └─ Backup heater A.5.1.1 [4-00] R/W 0~2 0: Disabled 1: Enabled A.5.1.3 [4-07] R/W 0: No 1: Yes A.5.1.4 [5-01] R/W -15~35°C, step: 1°C 0°C └─ System operation └─ Auto restart A.6.1 [3-00] R/W 0: No 1: Yes └─ Preferential kWh rate A.6.2.1 [D-00] R/W 0: None 1: BSH only 2: BUH only 3: All heaters A.6.2.2 [D-05] R/W 0: Forced off 1: As normal └─ Pwr consumpt. Control A.6.3.1 [4-08] R/W 0: No limitation 1: Continuous 2: Digital inputs Allowed heaters Forced pump OFF Mode Operation mode Enable BUH step 2 Equilibrium temp. Disinfection Operation day Start time Temperature target Duration Room temp. step A.3.3.1 [4-02] Space heating OFF temp R/W Space cooling On temp Heating Cooling Room temp. offset Ext. room sensor offset 4P383508-1B - 2017.04 (*1) *HB*_(*2) *HV*_ (*3) *3V_(*4) *9W_ (*5) *04/08*_ (*6) *11/16*

Installer setting at variance with default value A.6.3.2 [4-09] R/W 0: Current 1: Power A.6.3.3 [5-05] R/W 0~50 A, step: 1 A 50 A A.6.3.4 [5-09] R/W 0~20 kW, step: 0,5 kW 20 kW A.6.3.5.1 [5-05] Amp. limits for DI Limit DI1 R/W 0~50 A, step: 1 A 50 A A.6.3.5.2 [5-06] Amp. limits for DI Limit DI2 R/W 0~50 A, step: 1 A 50 A A.6.3.5.3 [5-07] Amp. limits for DI Limit DI3 R/W 0~50 A, step: 1 A 50 A A.6.3.5.4 [5-08] Amp. limits for DI Limit DI4 R/W 0~50 A, step: 1 A 50 A A.6.3.6.1 [5-09] kW limits for DI Limit DI1 R/W 0~20 kW, step: 0,5 kW 20 kW A.6.3.6.2 [5-0A] kW limits for DI Limit DI2 R/W 0~20 kW, step: 0,5 kW 20 kW A.6.3.6.3 [5-0B] kW limits for DI Limit DI3 R/W 0~20 kW, step: 0,5 kW 20 kW A.6.3.6.4 [5-0C] kW limits for DI Limit DI4 R/W 0~20 kW, step: 0,5 kW 20 kW A.6.3.7 [4-01] R/W 0: None 1: BSH 2: BUH └─ Averaging time A.6.4 [1-0A] R/W 0: No averaging 1: 12 hours 2: 24 hours 3: 48 hours 4: 72 hours └─ Ext amb. sensor offset A.6.5 [2-0B] R/W -5~5°C, step: 0,5°C 0°C └─ Boiler efficiency A.6.A [7-05] R/W 0: Very high 1: High 2: Medium 3: Low 4: Very low └─ Emergency A.6.C R/W 0: Manual 1: Automatic └─ Overview settings A.8 [0-00] R/W [9-05]~min(45,[9-06])°C, step: 1°C 35°C A.8 [0-01] R/W [9-05]~[9-06]°C, step: 1°C 45°C A.8 [0-02] R/W 10~25°C, step: 1°C 15°C A.8 [0-03] R/W -40~5°C, step: 1°C -10°C A.8 [0-04] R/W [9-07]~[9-08]°C, step: 1°C 8°C A.8 [0-05] R/W [9-07]~[9-08]°C, step: 1°C 12°C A.8 [0-06] R/W 25~43°C, step: 1°C 35°C A.8 [0-07] R/W 10~25°C, step: 1°C 20°C A.8 [0-0B] R/W 35~[6-0E]°C, step: 1°C 55°C A.8 [0-0C] R/W 45~[6-0E]°C, step: 1°C 60°C A.8 [0-0D] R/W 10~25°C, step: 1°C 15°C A.8 [0-0E] R/W -40~5°C, step: 1°C -10°C A.8 [1-00] R/W -40~5°C, step: 1°C -10°C A.8 [1-01] R/W 10~25°C, step: 1°C 15°C A.8 [1-02] R/W [9-01]~[9-00], step: 1°C 35°C A.8 [1-03] R/W [9-01]~min(45, [9-00])°C , step: 1°C 25°C A.8 [1-04] R/W 0: Disabled 1: Enabled A.8 [1-05] R/W 0: Disabled 1: Enabled A.8 [1-06] R/W 10~25°C, step: 1°C 20°C A.8 [1-07] R/W 25~43°C, step: 1°C 35°C A.8 [1-08] R/W [9-03]~[9-02]°C, step: 1°C 22°C A.8 [1-09] R/W [9-03]~[9-02]°C, step: 1°C 18°C A.8 [1-0A] R/W 0: No averaging 1: 12 hours 2: 24 hours 3: 48 hours 4: 72 hours A.8 [2-00] R/W 0: Each day 1: Monday 2: Tuesday 3: Wednesday 4: Thursday 5: Friday 6: Saturday 7: Sunday A.8 [2-01] R/W 0: No 1: Yes When should the disinfection function be executed? Should the disinfection function be executed? High ambient temp. for LWT main zone cooling WD curve. Leaving water value for low ambient temp. for LWT main zone cooling WD curve. Leaving water value for high ambient temp. for LWT main zone cooling WD curve. What is the averaging time for the outdoor temp? High ambient temp. for LWT main zone heating WD curve. Leaving water value for low ambient temp. for LWT main zone heating WD curve. Leaving water value for high ambient temp. for LWT main zone heating WD curve. Weather dependent cooling of the main leaving water temperature zone. Weather dependent cooling of the additional leaving water temperature zone Low ambient temp. for LWT main zone cooling WD curve. Low ambient temp. for LWT add zone cooling WD curve. Leaving water value for high ambient temp. for DHW WD curve. Leaving water value for low ambient temp. for DHW WD curve. High ambient temp. for DHW WD curve. Low ambient temp. for DHW WD curve. Low ambient temp. for LWT main zone heating WD curve. Leaving water value for low ambient temp. for LWT add zone heating WD curve. High ambient temp. for LWT add zone heating WD curve. Low ambient temp. for LWT add zone heating WD curve. Leaving water value for high ambient temp. for LWT add zone cooling WD curve. Leaving water value for low ambient temp. for LWT add zone cooling WD curve. High ambient temp. for LWT add zone cooling WD curve. kW value Priority Leaving water value for high ambient temp. for LWT add zone heating WD curve. Type Amp. value (*1) *HB*_(*2) *HV*_ (*3) *3V_(*4) *9W_ (*5) *04/08*_ (*6) *11/16* 4P383508-1B - 2017.04

Installer setting at variance with default value A.8 [2-02] R/W 0~23 hour, step: 1 hour 23 A.8 [2-03] R/W [E-07]≠1 : 55~80°C, step: 5°C 70°C [E-07]=1 : 60°C 60°C A.8 [2-04] R/W [E-07]≠1: 5~60 min, step: 5 min 10 min [E-07]=1: 40~60 min, step: 5 min 40 min A.8 [2-05] R/W 4~16°C, step: 1°C 12°C A.8 [2-06] R/W 0: Disabled 1: Enabled A.8 [2-09] R/W -5~5°C, step: 0,5°C 0°C A.8 [2-0A] R/W -5~5°C, step: 0,5°C 0°C A.8 [2-0B] R/W -5~5°C, step: 0,5°C 0°C A.8 [3-00] R/W 0: No 1: Yes A.8 [3-01] 0 A.8 [3-02] 1 A.8 [3-03] 4 A.8 [3-04] 2 A.8 [3-05] 1 A.8 [3-06] R/W 18~30°C, step: A.3.2.4 30°C A.8 [3-07] R/W 12~18°C, step: A.3.2.4 12°C A.8 [3-08] R/W 25~35°C, step: A.3.2.4 35°C A.8 [3-09] R/W 15~25°C, step: A.3.2.4 15°C A.8 [4-00] R/W 0: Disabled 1: Enabled 2: Only DHW A.8 [4-01] R/W 0: None 1: BSH 2: BUH 14~35°C, step: 1°C 25°C (*5) 14~35°C, step: 1°C 35°C (*6) A.8 [4-03] R/W 0: Limited 1: No limit 2: Most optimum 3: Optimum 4: Only legionella A.8 [4-04] 2 A.8 [4-05] 0 A.8 [4-06] 0/1 A.8 [4-07] R/W 0: No 1: Yes A.8 [4-08] R/W 0: No limitation 1: Continuous 2: Digital inputs A.8 [4-09] R/W 0: Current 1: Power A.8 [4-0A] 0 A.8 [4-0B] R/W 1~10°C, step: 0,5°C 1°C A.8 [4-0D] R/W 1~10°C, step: 0,5°C 3°C A.8 [5-00] R/W 0: Allowed 1: Not allowed A.8 [5-01] R/W -15~35°C, step: 1°C 0°C A.8 [5-02] R/W 0: Disabled [E-07]≠1 1: Enabled [E-07]=1 A.8 [5-03] R/W -15~35°C, step: 1°C 0°C A.8 [5-04] R/W 0~20°C, step: 1°C 10°C A.8 [5-05] R/W 0~50 A, step: 1 A 50 A A.8 [5-06] R/W 0~50 A, step: 1 A 50 A A.8 [5-07] R/W 0~50 A, step: 1 A 50 A A.8 [5-08] R/W 0~50 A, step: 1 A 50 A A.8 [5-09] R/W 0~20 kW, step: 0,5 kW 20 kW A.8 [5-0A] R/W 0~20 kW, step: 0,5 kW 20 kW A.8 [5-0B] R/W 0~20 kW, step: 0,5 kW 20 kW A.8 [5-0C] R/W 0~20 kW, step: 0,5 kW 20 kW A.8 [5-0D] R/W 0: 1P,(1/2) 1: 1P,(1/1+2) (*3) 2: 3P,(1/2) 3: 3P,(1/1+2) 4: 3PN,(1/2) 5: 3PN,(1/1+2) (*4) A.8 [5-0E] 1 A.8 [6-00] R/W 2~20°C, step: 1°C 2°C A.8 [6-01] R/W 0~10°C, step: 1°C 2°C The temperature difference determining the heat pump OFF temperature. What is the requested limit for DI2? What is the requested limit for DI3? What is the requested limit for DI4? What type of backup heater installation is used? -- The temperature difference determining the heat pump ON temperature. Set point correction for domestic hot water temperature. What is the requested limit for DI1? What is the requested limit for DI2? What is the requested limit for DI3? What is the requested limit for DI4? What is the requested limit for DI1? Automatic cooling/heating changeover hysteresis. Automatic cooling/heating changeover offset. Is backup heater operation allowed above equilibrium temperature during space heating operation? What is the equilibrium temperature for the building? Space heating priority. Space heating priority temperature. -- -- (Do not change this value) Enable the second step of the backup heater? Which power limitation mode is required on the system? Which power limitation type is required? -- A.8 [4-02] Below which outdoor temperature is heating allowed? R/W Operation permission of the booster heater. -- What is the maximum desired room temperature in heating? What is the mimimum desired room temperature in heating? What is the maximum desired room temperature in cooling? What is the minimum desired room temperature in cooling? What is the BUH operation mode? Which electric heater has priority? Is auto restart of the unit allowed? -- -- -- -- -- How long must the tank temperature be maintained? Room antifrost temperature Room frost protection Adjust the offset on the measured room temperature Adjust the offset on the measured room temperature What is the required offset on the measured outdoor temp.? When should the disinfection function start? What is the disinfection target temperature? 4P383508-1B - 2017.04 (*1) *HB*_(*2) *HV*_ (*3) *3V_(*4) *9W_ (*5) *04/08*_ (*6) *11/16*

Installer setting at variance with default value A.8 [6-02] R/W 0~10kW, step: 0,2kW 3kW (*1) 0kW (*2) A.8 [6-03] R/W 0~10kW, step: 0,2kW 3kW A.8 [6-04] R/W 0~10kW, step: 0,2kW 0kW (*3) 6kW (*4) A.8 [6-05] 0 A.8 [6-06] 0 A.8 [6-07] R/W 0~200W, step: 10W 0W A.8 [6-08] R/W 2~20°C, step: 1°C 10°C A.8 [6-09] 0 A.8 [6-0A] R/W 30~[6-0E]°C, step: 1°C 60°C A.8 [6-0B] R/W 30~min(50, [6-0E])°C, step: 1°C 45°C A.8 [6-0C] R/W 30~min(50, [6-0E])°C, step: 1°C 45°C A.8 [6-0D] R/W 0: Reheat only 1: Reheat + sched. 2: Scheduled only A.8 [6-0E] R/W [E-07]≠1 : 40~80°C, step: 1°C 60°C [E-07]=1 : 40~60°C, step: 1°C 60°C A.8 [7-00] R/W 0~4°C, step: 1°C 0°C A.8 [7-01] R/W 2~40°C, step: 1°C 2°C A.8 [7-02] R/W 0: 1 LWT zone 1: 2 LWT zones A.8 [7-03] 2,5 A.8 [7-04] 0 A.8 [7-05] R/W 0: Very high 1: High 2: Medium 3: Low 4: Very low A.8 [8-00] 1 min A.8 [8-01] R/W 5~95 min, step: 5 min 30 min A.8 [8-02] R/W 0~10 hour, step: 0,5 hour 0,5 hour [E-07]=1 3 hour [E-07]≠1 A.8 [8-03] R/W 20~95 min, step: 5 min 50 min A.8 [8-04] R/W 0~95 min, step: 5 min 95 min A.8 [8-05] R/W 0: No 1: Yes A.8 [8-06] R/W 0~10°C, step: 1°C 3°C A.8 [8-07] R/W [9-03]~[9-02], step: 1°C 18°C A.8 [8-08] R/W [9-03]~[9-02], step: 1°C 20°C A.8 [8-09] R/W [9-01]~[9-00], step: 1°C 35°C A.8 [8-0A] R/W [9-01]~[9-00], step: 1°C 33°C A.8 [8-0B] 13 A.8 [8-0C] 10 A.8 [8-0D] 16 A.8 [9-00] R/W 37~depending on outdoor unit, step: 1°C 55°C A.8 [9-01] R/W 15~37°C, step: 1°C 25°C A.8 [9-02] R/W 18~22°C, step: 1°C 22°C A.8 [9-03] R/W 5~18°C, step: 1°C 5°C A.8 [9-04] R/W 1~4°C, step: 1°C 1°C A.8 [9-05] R/W 15~37°C, step: 1°C 25°C A.8 [9-06] R/W 37~depending on outdoor unit, step: 1°C 55°C A.8 [9-07] R/W 5~18°C, step: 1°C 5°C A.8 [9-08] R/W 18~22°C, step: 1°C 22°C A.8 [9-09] R/W 3~10°C, step: 1°C 5°C A.8 [9-0A] R/W 3~10°C, step: 1°C 5°C A.8 [9-0B] R/W 0: Quick 1: Slow A.8 [9-0C] R/W 1~6°C, step: 0,5°C 1 °C A.8 [9-0D] R/W 0~8, step:1 0 : 100% 1~4 : 80~50% 5~8 : 80~50% 6 A.8 [9-0E] 6 A.8 [A-00] 0 A.8 [A-01] 0 (*5) 3 (*6) -- -- -- What is the maximum desired LWT for add. zone in cooling? What is the desired delta T in heating? What is the desired delta T in cooling? What emitter type is connected to the main LWT zone? Room temperature hysteresis. Pump speed limitation What is the maximum desired LWT for main zone in cooling? What is the mimimum desired LWT for main zone in cooling? Leaving water temperature overshoot temperature. What is the mimimum desired LWT for add. zone in heating? What is the maximum desired LWT for add. zone in heating? What is the mimimum desired LWT for add. zone in cooling? What is the desired eco main LWT in heating? -- -- -- What is the maximum desired LWT for main zone in heating? What is the mimimum desired LWT for main zone in heating? Additional running time for the maximum running time. Allow modulation of the LWT to control the room temp? Leaving water temperature maximum modulation. What is the desired comfort main LWT in cooling? What is the desired eco main LWT in cooling? What is the desired comfort main LWT in heating? -- Boiler efficiency -- Maximum running time for domestic hot water operation. Anti-recycling time. Booster heater delay timer. What is the desired DHW production type? What is the maximum temperature setpoint? Domestic hot water booster heater overshoot temperature. Domestic hot water booster heater hysteresis. How many leaving water temperature zones are there? -- What is the capacity of the bottom plate heater? What is the hysteresis to be used in reheat mode? -- What is the desired comfort storage temperature? What is the desired eco storage temperature? What is the desired reheat temperature? What is the capacity of the booster heater? What is the capacity of the backup heater step 1? What is the capacity of the backup heater step 2? -- -- (*1) *HB*_(*2) *HV*_ (*3) *3V_(*4) *9W_ (*5) *04/08*_ (*6) *11/16* 4P383508-1B - 2017.04

Installer setting at variance with default value A.8 [A-02] 0 (*5) 1 (*6) A.8 [A-03] 0 A.8 [A-04] 0 A.8 [B-00] 0 A.8 [B-01] 0 A.8 [B-02] 0 A.8 [B-03] 0 A.8 [B-04] 0 A.8 [C-00] R/W 0: Solar priority 1: Heat pump priority A.8 [C-01] 0 A.8 [C-02] R/W 0: No 1: Bivalent 2: - 3: - A.8 [C-03] R/W -25~25°C, step: 1°C 0°C A.8 [C-04] R/W 2~10°C, step: 1°C 3°C A.8 [C-05] R/W 1: Thermo ON/OFF 2: C/H request A.8 [C-06] R/W 0: - 1: Thermo ON/OFF 2: C/H request A.8 [C-07] R/W 0: LWT control 1: Ext RT control 2: RT control A.8 [C-08] R/W 0: No 1: Outdoor sensor 2: Room sensor A.8 [C-09] R/W 0: Normally open 1: Normally closed A.8 [C-0A] 0 A.8 [C-0C] R/W 0~7 0 A.8 [C-0D] R/W 0~7 0 A.8 [C-0E] R/W 0~7 0 A.8 [D-00] R/W 0: None 1: BSH only 2: BUH only 3: All heaters A.8 [D-01] R/W 0: No 1: Open tariff 2: Closed tariff 3: Thermostat A.8 [D-02] R/W 0~4 0: No 1: Secondary rtrn 2: Disinf. shunt A.8 [D-03] R/W 0: Disabled 1: Enabled, shift 2°C (from -2 to 2°C) 2: Enabled, shift 4°C (from -2 to 2°C) 3: Enabled, shift 2°C (from -4 to 4°C) 4: Enabled, shift 4°C (from -4 to 4°C) A.8 [D-04] R/W 0: No 1: Pwr consmp ctrl A.8 [D-05] R/W 0: Forced off 1: As normal A.8 [D-07] R/W 0: No 1: Yes A.8 [D-08] R/W 0: No 1: 0,1 pulse/kWh 2: 1 pulse/kWh 3: 10 pulse/kWh 4: 100 pulse/kWh 5: 1000 pulse/kWh A.8 [D-09] R/W 0: No 1: 0,1 pulse/kWh 2: 1 pulse/kWh 3: 10 pulse/kWh 4: 100 pulse/kWh 5: 1000 pulse/kWh A.8 [D-0A] 0 A.8 [D-0B] 2 A.8 [D-0C] R/W 0~49 0 A.8 [D-0D] R/W 0~49 0 A.8 [D-0E] R/W 0~49 0 A.8 [E-00] R/O 0~5 0: LT split A.8 [E-01] R/O 0: 8 1: 16 A.8 [E-02] R/O 0: Type 1 1: Type 2 A.8 [E-03] R/O 0: No BUH 1: 1 step 2: 2 steps A.8 [E-04] R/O 0: No 1: Yes A.8 [E-05] R/W 0: No (*1) 1: Yes (*2) A.8 [E-06] R/O 0: No 1: Yes A.8 [E-07] R/W 0~6 0: Type 1 (*1) 1: Type 2 (*2) A.8 [E-08] R/W 0: Disabled (*6) 1: Enabled (*5) Forced off contact type What is the number of backup heater steps? Is the power saving function available on the outdoor unit? Can the system prepare domestic hot water? Is a DHW tank installed in the system? What kind of DHW tank is installed? Power saving function for outdoor unit. What is the high electricity price (Do not use) What is the medium electricity price (Do not use) What is the low electricity price (Do not use) Which type of unit is installed? Which type of compressor is installed? What is the indoor unit software type? Is the pump allowed to run if prefer. kWh rate PS is cut? Is a solar kit connected? Is an external kWh meter used for power measurement? Is an external kWh meter used for power measurement? -- -- Low electricity price decimal (Do not use) Which heaters are permitted if prefer. kWh rate PS is cut? Which type of DHW pump is installed? Leaving water temperature compensation around 0°C. Is a demand PCB connected? What is the unit control method in space operation? Which type of external sensor is installed? What is the required alarm output contact type? -- High electricity price decimal (Do not use) Medium electricity price decimal (Do not use) -- Is an external backup heat source connected? Bivalent activation temperature. Bivalent hysteresis temperature. What is the thermo request contact type for the main zone? What is the thermo request contact type for the add. zone? -- -- -- -- -- Domestic heating water priority. -- -- -- 4P383508-1B - 2017.04 (*1) *HB*_(*2) *HV*_ (*3) *3V_(*4) *9W_ (*5) *04/08*_ (*6) *11/16*

Installer setting at variance with default value A.8 [E-09] 0 A.8 [E-0A] 0 A.8 [E-0B] 0 A.8 [E-0C] 0 A.8 [E-0D] -- 0 A.8 [F-00] R/W 0: Disabled 1: Enabled A.8 [F-01] R/W 10~35°C, step: 1°C 20°C A.8 [F-02] R/W 3~10°C, step: 1°C 3°C A.8 [F-03] R/W 2~5°C, step: 1°C 5°C A.8 [F-04] R/W 0: No 1: Yes A.8 [F-05] 0 A.8 [F-06] 0 A.8 [F-09] R/W 0: Disabled 1: Enabled A.8 [F-0A] 0 A.8 [F-0B] R/W 0: No 1: Yes A.8 [F-0C] R/W 0: No 1: Yes A.8 [F-0D] R/W 0: Continuous 1: Sample 2: Request -- Close shut-off valve during thermo OFF? Close shut-off valve during cooling? What is the pump operation mode? -- Bottom plate heater ON temperature. Bottom plate heater hysteresis. Is a bottom plate heater connected? -- -- Pump operation during flow abnormality. -- -- -- Pump operation allowed outside range. Above which outdoor temperature is cooling allowed? (*1) *HB*_(*2) *HV*_ (*3) *3V_(*4) *9W_ (*5) *04/08*_ (*6) *11/16* 4P383508-1B - 2017.04