Pavilion PR199DV Installation Manual

Installation must conform with local codes, or in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1 / NFPA 54 - latest edition and/or the Natural Gas and Propane Installation Code CSA B149.1 - latest edition. When applicable, installation must conform with the Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280 or the Canadian Standard CAN/CSA-Z240 MH Mobile Homes, Series M86. PB Heat reserves the right to discontinue, or change at any time, the designs and/or specifications of its products without notice. Contact Pavilion Customer Center at 1-855-443-8468, if you have any questions or concerns. CONDENSING RECIRCULATING TANKLESS GAS WATER HEATER Installation Manual Model : PR199DV (GQ-C3260WXQ-FF PB US) If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. • Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. • WHAT TO DO IF YOU SMELL GAS - Do not try to light any appliance. - Do not touch any electrical switch; do not use any phone in your building. - Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. - If you cannot reach your gas supplier, call the fire department. • Installation and service must be performed by a qualified installer, service agency or the gas supplier. WARNING Low NOx Approved by SCAQMD 14 ng/J or 20 ppm (Natural Gas Only) SBB819G-2 Rev. 11/20 Requests to Installers • In order to use the Water Heater safely, read this installation manual carefully, and follow the installation instructions. • Failures and damage caused by erroneous work or work not as instructed in this manual are not covered by the Pavilion Limited Warranty. • Check that the installation was done properly in accordance with this Installation Manual upon completion. • After completing installation, either place this Installation Manual and Owner’s Guide (the warranty registration information included) in a plastic pouch and attach it to the side of the Water Heater (or the inside of the pipe cover or recess box if applicable), or hand it to the customer to retain for future reference. For the warranty conditions and limitations, see the Owner’s Guide. CAUTION PB HEAT, LLC

5 2.1 Included Accessories........................ 5 2.2 Optional Accessories........................ 5 2.3 Field Purchased Accessories............. 6 2.4 Specifications.................................... 7 2.5 Dimensions....................................... 8 2.6 External View.................................... 10 3 Choosing an Installation Location 11 4 Installation Clearances 13 4.1 Indoor Installation............................ 13 4.2 Outdoor Installation......................... 14 4.3 For Quick Connect Multi-System...... 14 5 Installation of the Water Heater 15 5.1 Mounting the Water Heater to the wall......................................... 15 5.2 Elevation Adjustment Above 2,000 ft.............................................. 16 5.3 Filling the condensate container with water......................................... 16 6 Venting the Water Heater 17 6.1 Venting Installation Sequence.......... 17 6.2 General Requirements...................... 17 6.3 Select a Vent Type............................. 23 6.4 Vent Pipe Installation (Direct Vent)... 24 6.5 Vent Pipe Installation (Non-Direct Vent)............................. 30 6.6 Outdoor Installation......................... 36 7 Connecting the Gas Supply 36 8 Connecting the Water Supply 40 8.1 Overview of the Recirculation System............................................... 40 8.2 Installation........................................ 43 8.3 Water treatment............................... 45 9 Connecting the Condensate Drain 47 10 Connecting Electricity 49 10.1 Water Heater.................................... 49 10.2 Remote Controller............................ 49 10.3 Recirculation..................................... 50 10.4 Quick Connect Cord.......................... 51 11 Installation of the Remote Controller 52 11.1 General Requirements...................... 52 11.2 RC-7651M-A NB................................ 52 11.3 RC-9018M NB................................... 54 12 Setting the DIP Switches 58 13 Setting for Recirculation 59 14 Trial Operation 60 15 Checklist After Installation 63 16 Plumbing Applications 65 17 Installation of the Quick Connect Multi-System 66 18 Maintenance 68 18.1 Periodic Check.................................. 68 18.2 Procedure for Flushing the Heat Exchanger......................................... 69

Potential dangers from accidents during installation and use are divided into the following four categories. Closely observe these warnings, they are critical to your safety. Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. Indicates a potentially hazardous situation which, if not avoided, may result in property damage. DANGER WARNING CAUTION NOTICE Checkup Check the fixing brackets and vent pipe yearly for damage or wear. Replace if necessary. Use Extreme Caution if Using With a Solar Pre-Heater Using this appliance with a solar pre-heater can lead to unpredictable output temperatures and possibly scalding. To ensure outlet temperatures do not exceed 120°F at faucets, mixing valve must be installed. Do not use a solar pre-heater with the Quick Connect Multi-System because the system may not operate properly. DANGER Precautions on Vent Pipe Replacement The vent system will almost certainly need to be replaced when this appliance is being installed. Only use vent materials that are specified in this Installation Manual for use on this appliance. Refer to the “Venting the Water Heater” section for details. If PVC, CPVC, or Category IV listed pipe is already installed, check for punctures, cracks, or blockages and consult with the vent pipe manufacturer before reusing. If the flexible polypropylene pipe is already installed, replace to the new flexible polypropylene pipe. Improper venting may result in fires, property damage or exposure to Carbon Monoxide. Check the Gas • Check that the rating plate indicates the correct type of gas. • Check that the gas supply line is sized for 199,900 Btu/h. Check the Power The power supply required is 120 VAC, at 60 Hz. Using the incorrect voltage may result in fire or electric shock. Snow Precaution If this product will be installed in an area where snow is known to accumulate, protect the vent termination from blockage by snow drifts or damage from snow falling off of roofs. Precautions for Mobile Home Installation • Verify that the gas supply type matches the gas type listed on the rating plate. If a gas conversion must be done, follow the instructions listed in the gas conversion kit manual. • If this product will be installed indoors, usage of the SV conversion kit and the Flex Vent 2 in. Conversion Kit are prohibited. Make sure to follow all clearance and venting requirements outlined in this manual. Chemicals This product can expose you to chemicals including lead, lead compounds and carbon bisulfide which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. WARNING Before Installation

potable water and space heating applications. It cannot be used for space heating applications only. • Do not use this appliance if any part has been underwater. Immediately call a qualified service technician to inspect the appliance and replace any part of the control system and gas control which has been under water. NOTICE Do Not Use Appliance for Purposes Other Than Those Specified Do not use for other than increasing the temperature of the water supply, as unexpected accidents may occur as a result. Check Water Supply Quality If the water supply is in excess of 12 grains per gallon (200 mg/L) of hardness, acidic or otherwise impure, treat the water with approved methods in order to ensure full warranty coverage. CAUTION Please read if installing in Massachusetts Massachusetts requires manufacturers of Side Wall Vented products to provide the following information from the Massachusetts code: • A hard wired carbon monoxide detector with an alarm and battery back-up must be installed on the floor level where the gas equipment is to be installed AND on each additional level of the dwelling, building or structure served by the side wall horizontal vented gas fueled equipment. • In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard wired carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level. • Detector(s) must be installed by qualified licensed professionals. • APPROVED CARBON MONOXIDE DETECTORS: Each carbon monoxide detector shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified. • SIGNAGE: A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8) ft above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The sign shall read, in print size no less than one-half (1/2) in. in size, “GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS”. • EXEMPTIONS to the requirements listed above: - The above requirements do not apply if the exhaust vent termination is seven (7) ft or more above finished grade in the area of the venting, including but not limited to decks and porches. - The above requirements do not apply to a product installed in a room or structure separate from the dwelling, building or structure used in whole or in part for residential purposes. • This installation manual shall remain with the product at the completion of the installation. See the latest edition of Massachusetts Code 248 CMR for complete verbiage and also for additional (non-vent related) requirements (248 CMR is available online). If your installation is NOT in Massachusetts, please see your authority of jurisdiction for requirements that may be in effect in your area. In the absence of such requirements, follow the National Fuel Gas Code, ANSI Z223.1/ NFPA 54 and/or CAN/CSA B149.1, Natural Gas and Propane Installation Code. Before Installation

Remote Controller (× 1) [RC-7651M-A NB] (See page 52) Owner’s Guide, Installation Manual (this document) (1 each) Remote Controller Cord (6 ft (1.8 m)) (× 1) Wall Mounting Bracket (× 1) Remote Controller Cord (26 ft (7.9 m)) (× 1) [Stock Code: 1810] Cross Over Valve Kit (× 1) [Stock Code: 1812] Crossover Kit (× 1) [Stock Code: 1829] On Demand Switch - Rocker Type (× 1) [Stock Code: 1831] On Demand Button (× 1) [Stock Code: 1830] PVC Concentric Termination (× 1) 2 in. (50 mm): [Stock Code: 1813] 3 in. (75 mm): [Stock Code: 1813-1] 2 in. SV Conversion Kit (× 1) [Stock Code: 1814] • 90° Elbow (With Inlet Screen) • 2 in. × 3 in. Increaser coupling • 2 in. Pipe • Installation Manual (Check List) Outdoor Vent Cap (× 1) [Stock Code: 1815] Quick Connect Cord (× 1) [Stock Code: 1809] 2 About the Water Heater The following accessories are included with the Water Heater. Check for any missing items before starting installation. The accessories listed below are not included with the Water Heater, but may be necessary for installation. 2.1 Included Accessories 2.2 Optional Accessories NOTE Additional vent pieces are available; consult the latest product catalogue for details. About the Water Heater

[Stock Code: 1824] Flex Vent 2 in. Kit – 35 ft [Stock Code: 1824-1] During the installation of Flex Vent 2 in. Kit, ambient temperatures must be greater than 40°F (5°C). Afterwards, installation site ambient temperature must be greater than -4°F (-20°C). Flex vent pipe breakage may occur if these temperature requirements are not observed. Remote Controller (RC-9018M NB) (× 1) [Stock Code: 1825] (See page 54) Service Valve Kit with Pressure Relief Valve (1 each) Not supplied from PB Heat. Service Valve Kit may be purchased separately from an authorized wholesaler. The following are required specification for Isolation valves. 1. Comply with Lead Free installation requirement. 2. Certified to NSF/ANSI 61. 3. Shall facilitate isolation of the water heater from the water line. 4. 3/4” FTP Unions for connection to water heater. 5. 3/4” size connection for water lines (Cold and Domestic hot water lines). 6. Equipped with purge and drain valve for hose connection and tethered brass cap. 7. Equipped with the 3/4” connection for optional pressure relief valve (150psi). Scale Inhibitor (1 each) Damage to the Heat Exchanger caused by Scale Build-up is not covered by the Pavilion Limited Warranty. To prevent the Heat Exchanger damage, the water must be treated with a Southeastern Filtration Scale StickTM, 3M Aqua- PureTM scale inhibitor, or other scale inhibitor system. 2.3 Field Purchased Accessories Bird Screen for 2 in. (50 mm) PVC [Stock Code: 1816] Bird Screen for 3 in. (75 mm) PVC [Stock Code: 1817] 3 in. (75 mm) Horizontal Hood Termination [Stock Code: 1818] Universal Concentric Vent Kit [Stock Code: 1819] Low Profile Termination Kit 2 in.: [Stock Code: 1820] 3 in.: [Stock Code: 1820-1] ULC S636 / UL 1738 certified for use in both Canada and USA Plastic Rain Cap [Stock Code: 1821] Not approved for use in Canada. Neutralizer (× 1) [Stock Code: 1822] Flex Vent 2 in. Conversion Kit [Stock Code: 1823] Pipe Cover (× 1) [Stock Code: 1828] About the Water Heater

• The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. * Minimum flow rate may change by setting temperature and water temperature. Item Specification Model Name PR199DV (GQ-C3260WXQ-FF PB US) Type Installation Indoor / Outdoor Wall mounted Air Supply / Exhaust Power Vented Ignition Direct Ignition Operating Pressure 15-150 psi (Recommended 50 to 80 psi for maximum performance) Minimum Activation Flow Rate* Minimum Operating Flow Rate* 0.5 GPM (2.0 L/min) 0.29 GPM (1.1 L/min) Dimensions (Height) × (Width) × (Depth) 27.0 in. (687 mm) × 18.5 in. (471 mm) × 14.1 in. (359 mm) Weight 73 lbs. (33 kg) Water Holding Capacity 0.85 Gallon (3.2 L) Connection Sizes Water Inlet NPT 3/4 in. Hot Water Outlet NPT 3/4 in. Hot Water Return NPT 3/4 in. Gas Inlet NPT 3/4 in. Condensate Drain NPT 1/2 in. Power Supply Supply 120 VAC (60 Hz) Consumption NG: 218 W LP: 202 W Freeze Prevention: 114 W Maximum Current 4 Amps Materials Casing •Front Cover: Hot-dipped zinc-aluminum-magnesium-alloy-coated steel w/ Polyester Coating •Casing: Zincified Steel Plate / Polyester Coating Flue Collar PP Primary Heat Exchanger Stainless Steel Sheeting, Stainless Steel Tubing Secondary Heat Exchanger Stainless Steel Sheeting, Stainless Steel Tubing Safety Devices Flame Rod, High Limit Switch, Lightning Protection Device (ZNR), Freezing Prevention Device, Fan Rotation Detector Included Accessories Remote Controller, Remote Controller Cord, Anchoring Screws, Wall Mounting Bracket Item Performance Maximum Minimum Gas Consumption NG 199,900 Btu/h 18,000 Btu/h LP 199,900 Btu/h 18,000 Btu/h Maximum Hot Water Capacity (45°F (25°C) Rise) 8.7 GPM (33 L/min) Capacity Range 0.5-11.1 GPM (2-42 L/min) Temperature Settings °F Mode 100-140°F (In 5°F intervals) (9 Options) °C Mode 37-48°C (In 1°C intervals), 50-60°C (In 5°C intervals) (15 Options) Performances About the Water Heater

(INCLUDED ACCESSORY) 7×Φ0.2”[Φ6] 16.0”[406] 10.2”[260] 5.1”[130] 7.2”[183] 2.1”[5.3] About the Water Heater

COLD WATER INLET(3/4”) WIRING THROUGHWAY WATER DRAIN VALVE (WATER FILTER) WIRING THROUGHWAY (AC120V) WATER DRAIN VALVE HOT WATER OUTLET(3/4”) GAS INLET(3/4”) WATER DRAIN VALVE HOT WATER RETURN(3/4”) 11.3”[288] 9.7”[246] 2.0”[51] 4.9”[124] 1.7”[42] 5.7”[144] 7.0”[177] 9.2”[234] 15.4”[392] 15.6”[397] 10.9”[276] CONDENSATE DRAIN(1/2”) WATER DRAIN VALVE 2.2”[56] 6.0”[152] 8.3”[229] 27.0”[687] HEIGHT OF EACH FITTING FROM BOTTOM OF CASE HOT WATER OUTLET 1.8”[45] COLD WATER INLET 1.9”[49] CONDENSATE DRAIN 1.7”[42] HOT WATER RETURN 2.7”[69] GAS INLET 2.2”[56] About the Water Heater

Indoor Installation Water Supply Valve Hot Water Return Valve Gas Supply Valve Condensate Drain Pipe Water Drain Valve (with Water Filter) Pressure Relief Valve Hot Water Valve Outdoor Installation Outdoor Vent Cap Intake Pipe Exhaust Pipe Flex Vent 2 in. Conversion Kit About the Water Heater

Locate the vent terminal and make sure there are no obstacles around the termination for exhaust to accumulate or be obstructed. Do not enclose the termination with corrugated metal or other materials. Carbon monoxide poisoning or fire may occur as a result. DANGER • Avoid places where fires are common, such as those where gasoline, benzene and adhesives are handled, or places in which corrosive gases (ammonia, chlorine, sulfur, ethylene compounds, acids) are present. If you do not follow the above, a fire or explosion may result causing property damage, personal injury or death. • Avoid installation in places where dust or debris will accumulate. Dust may accumulate and reduce the performance of the fan of the appliance. This can result in incomplete combustion. • Avoid installation in places where special chemical agents (e.g. hair spray or spray detergent) are used. Ignition failures and malfunctions may occur as a result. • Do not install this Water Heater in a recreational vehicle or on a boat as this may be a Carbon Monoxide Poisoning Hazard. • The manufacturer does not recommend installing the Water Heater in an attic due to safety issues. If you install the Water Heater in an attic: - Make sure the appliance will have enough combustion air and proper ventilation. - Keep the area around the Water Heater clean. Dust may accumulate and reduce the performance of the fan of the appliance. This can result in incomplete combustion. - A drain pan, or other means of protection against water damage, is required to be installed under the Water Heater in case of leaks. WARNING Do not install in the following places • A location where it is not free from obstacles and stagnant air. • Near staircases or emergency exits. • A place where it may be threatened by falling objects, such as under shelves. • On common walls as the appliance will make some operational noises while it is running. Consideration to the surroundings • Do not install the Water Heater where the exhaust will blow on outer walls, other walls or material not resistant to heat. Also consider the surrounding trees and animals. The heat and moisture from the Water Heater may cause discoloration of walls and resinous materials, or corrosion of aluminum materials. • Do not locate the vent termination directed towards a window or any other structure which has glass or wired glass facing the termination. • Take care that noise and exhaust gas will not affect neighbors. • If the appliance is installed in a location with very high humidity, condensate may form inside the appliance and/or cause incomplete combustion, damage to the electrical components, or electric leakage. Install according to regulations and manual • Install the Water Heater in an area that allows for the proper clearances to combustible and non-combustible construction. Consult the rating plate on the appliance for proper clearances. • The Water Heater must be installed according to manual. • Before installing, make sure that the exhaust flue termination will have the proper clearances according to the National Fuel Gas Code (ANSI Z223.1 - latest edition) or the Natural Gas and Propane Installation Code (CSA B149.1). CAUTION Choosing an Installation Location

stoves, fans, and range hoods • Avoid installation above gas ranges or stoves. • Avoid installation between the kitchen fan and stove. If oily fumes or a large amount of steam are present in the installation location, take measures to prevent the fumes and steam from entering in the appliance. • Install in a location where the exhaust gas flow will not be affected by fans or range hoods. CAUTION NOT CORRECT CORRECT NOT CORRECT • Place the appliance for easy access for maintenance and repair. • Do not install the Water Heater in a location where the appliance will be exposed to excessive winds. • Locate the appliance in an area where leakage from the appliance or connections will not result in damage to the area adjacent to the appliance or to the lower floors of the structure. When such installation locations cannot be avoided, a suitable drain pan, adequately drained, must be installed under the appliance. The pan must not restrict combustion air flow. • As with any water heating appliance, the potential for leakage at some time in the life of the product does exist. The manufacturer will not be responsible for any water damage that may occur. • Water quality: If this Water Heater will be installed in a location where the hardness of the supply water is high, scale Build-up may cause damage to the Heat Exchanger. Perform suggested treatment and maintenance measures in reference to “8.3 Water Treatment”. Damage to the Water Heater as a result of the below is not covered by the Pavilion Limited Warranty. - ‌Water in excess of 12 gpg (200 mg/L) of hardness - ‌Poor water quality (see the following table) NOTICE Contaminant Maximum Allowable Level Total Hardness* 200 mg/L (12 gpg) or less Aluminum 0.05 to 0.2 mg/L or less Chloride 250 mg/L or less Copper 1.0 mg/L or less Iron 0.3 mg/L or less Manganese 0.05 mg/L or less pH 6.5-8.5 Total Dissolved Solids 500 mg/L or less Zinc 5 mg/L or less Sulfate 250 mg/L or less Residual chlorine* 4 mg/L or less Source: EPA National Secondary Drinking Water Regulations (40 CFR Part 143.3) * Maximum limit suggested/approved by the manufacturer. NOTE Consult with the customer concerning the location of installation. Choosing an Installation Location

braced, anchored or strapped to avoid moving during an earthquake. Contact local utilities for code requirements in your area or call 1-855-443-8468 and request instructions. The Commonwealth of Massachusetts: 1) ‌This Water Heater can only be used in outdoor applications if the usage is restricted to summertime usage exclusively. 2) ‌The Water Heater can be used for hot water only and not in a combination of domestic and space heating. For Venting Manufacturers Requirements, see the Pavilion website (https://www.peerlessboilers.com/). 4 Installation Clearances 4.1 Indoor Installation Before installing, check for the following: Install in accordance with relevant building and mechanical codes, as well as any local, state or national regulations, or in the absence of local and state codes, refer to National Fuel Gas Code ANSI Z223.1 / NFPA 54 - latest edition. In Canada, see the Natural Gas and Propane Installation Code CSA B149.1 - latest edition for detailed requirements. WARNING Required Clearances From the Water Heater Maintain the clearances from both combustible and non-combustible materials. 12 in. (300 mm) or more 3 in. (76 mm) or more 4 in. (100 mm) or more Securing of space for inspection/repair In order to facilitate inspection and repair, the minimum clearances should be met. * 3 in. (76 mm) or more ** 8 in. (203 mm) or more 24 in. (610 mm) or more * * ** ** Exhaust Choosing an Installation Location / Installation Clearances

Heater will be installed in the vicinity of a permanent kitchen range or stove that has the possibility of generating steam that contains fats or oils, use a dividing plate or other measure to ensure that the Water Heater is not exposed to air containing such impurities. Exhaust hood Range The dividing plate should be of non-combustible material of a width greater than the Water Heater. 4.2 Outdoor Installation Required Clearances From the Water Heater Maintain the clearances from both combustible and non-combustible materials. 24 in. (610 mm) or more 36 in. (910 mm) or more Outdoor Vent Cap 3 in. (76 mm) or more 4.3 For Quick Connect Multi-System Surrounding the area of installation [When installing the Water Heater in a common side corridor] 47 in. (1,194 mm) or more 84 in. (2,134 mm) or more the bottom edge of the exhaust port Common side corridor Handrail The Quick Connect Cord is 6 ft (1.8 m) long. Install the Water Heaters 3-18 in. (76-457 mm) apart from each other to ensure the cord will be able to reach between the Water Heaters. 3-18 in. (76-457 mm) Installation Clearances

5.1 Mounting the Water Heater to the wall • Protect your hands with gloves and take caution to not inflict injury. • Be careful not to hit electrical wiring, gas, or water piping while drilling holes. CAUTION • The weight of the appliance will be applied to the wall. If the strength of the wall is not sufficient, reinforcement must be done to prevent the transfer of vibration. • Install the appliance on a vertical wall and ensure that it is level. NOTICE Do not drop or apply unnecessary force to the appliance when installing. Internal parts may be damaged and may become highly dangerous. WARNING 1. Ensure that the Wall Mounting Bracket is leveled. Drill holes for the Wall Mounting Bracket and affix the Wall Mounting Bracket securely to the wall by 5 screws. Finally, make sure the bracket can support the weight of the Water Heater. 2. Hang the Water Heater on the Wall Mounting Bracket. After hanging the Water Heater, you have the ability to move either left or right to position the Water Heater in the appropriate spot. Once positioned, a screw (see below) can be fastened to ensure no horizontal movement will occur. (Not supplied from the manufacturer.) Mounng Bracket (Upper) Hang 3. Affix the Mounting Bracket (Lower) to the wall by 2 screws. Anchoring Screw Mounting Bracket (Lower) IN OUT The bracket has marking to assist with ensuring properly aligned connections. Align the intake and exhaust vent center line with the corresponding mark on the bracket. Anchoring Screw Intake Vent Intake Vent Wall Mounting Bracket Exhaust Vent Exhaust Vent Installation of the Water Heater

with water 5.2 Elevation Adjustment Above 2,000 ft Prior to initial start up, make sure that you fill the condensate container with water. This is to prevent dangerous exhaust gases from entering the building. Failure to fill the condensate container could result in severe personal injury or death. DANGER Follow the procedure described below to ensure that the condensate container is filled with water. Fill the condensate container by pouring approx. 10 oz. (280 mL) of water into the exhaust flue on the top of the Water Heater as illustrated below. If the vent pipe has already been installed: After installing the condensate drain pipe, make sure that the area around the Water Heater is well ventilated; open a window or a door if necessary. Then, operate the Water Heater and verify that condensate is coming out of the condensate drain pipe. (During normal use of the Water Heater, condensate will begin to discharge from the condensate drain pipe within 15 minutes of use. However, depending on the season and/or installation site conditions, it may take longer.) 10 oz. 280 mL Intake Exhaust • Adjust the DIP switches as illustrated in the table below, if this Water Heater is installed at an altitude of 2,000 ft (610 m) or higher. • Disconnect the electrical power and then adjust the DIP switches. Refer to page 58 for the location of the DIP switch bank and how to change the DIP switches. Failure to perform this step will result a “73” code displayed on the Remote Controller and a cease in operation. If this occurs, disconnect, then reconnect the electrical power to the Water Heater to reset the system. NOTE Do not change any other DIP switches. Here High elevation adjustment DIP switches #5 #6 0-2,000 ft (0-610 m) OFF OFF 2,001-4,000 ft (611-1,219 m) ON OFF 4,001-7,000 ft (1,220-2,134 m) OFF ON 7,001-10,000 ft (2,135-3,048 m) ON ON Installation of the Water Heater

CARBON MONOXIDE POISONING Follow all vent system requirements in accordance with relevant local or state regulation, or, in the absence of local or state code, if in the U.S., refer to the National Fuel Gas Code ANSI Z223.1 / NFPA 54 - latest edition, and if in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1 - latest edition. WARNING 6.2 General Requirements • This is a Category IV appliance. Only vent materials approved for use with Category IV appliances shall be used. • Under normal conditions, this Water Heater will not produce an exhaust flue temperature in excess of 149°F (65°C). 6.2.1 Vent Piping Material For PVC/CPVC/PP material • Schedule 40 PVC pipe may be used as the vent material. If required by local code, use schedule 6.1 Venting Installation Sequence 4. Install termination assembly as described in this manual or in the vent manufacturer’s installation instructions. If necessary, install Bird Screen (not supplied with Water Heater). 5. Install combustion air and exhaust vent piping from Water Heater to termination. 6. Slope the horizontal vent 1/4 in. upwards for every 12 in. (305 mm) toward the termination. 7. Install supports and hanger straps allowing for movement from expansion, or as per vent pipe manufacturer’s instructions or local code requirements. The venting system shall be installed in accordance with the water heater manufacturer’s instructions and, if applicable, the venting system manufacturer’s instructions. 1. Install the Water Heater. 2. Determine the termination method—horizontal or vertical, etc. 3. Determine proper location for wall or roof penetration for each termination. NOTE Do not exceed maximum allowed vent lengths as described in this manual. [Pipe Cement / Primer] Material United States Canada Exhaust Air Intake Exhaust Air Intake Schedule 40 PVC ANSI/ASTM D1785 ULC S636 Certified Materials Only CSA B137.3 PVC-DWV ANSI/ASTM D2665 CSA B181.2 Schedule 40 CPVC ANSI/ASTM F441 CSA B137.3 Polypropylene (PP)* Centrotherm - lnnoFlue® (certified ULC S636), DuraVent PolyPro® (certified ULC S636) System 1738TM PVC Fuel Gas Venting IPEX Management Inc. (certified UL 1738) Material United States Canada PVC ANSI/ASTM D2564 ULC S636 Certified Materials Only CPVC ANSI/ASTM F493 * Only listed manufacture specified vent parts may be used for this Water Heater. Refer to the manufacture’s literature for detailed information. - Approved Vent Manufacture: - Centrotherm - lnnoFlue® PP - DuraVent PolyPro® ** ‌Applicable vent termination are “90° elbow” or “Tee type”. Concentric vent termination of polypropylene are prohibited. Parts # Single Wall Pipe (2 in. / 3 in.) ISVL02xx(UV)/03xx(UV), ISEP02xx/03xx, ISIA0203 Elbow ISELL0287(UV)/0387(UV), ISELL0245/0345 Termination** ISELL0287UV/0387UV, ISTT0220/0320 Bird Screen IASPP02/03 Parts # Single Wall Pipe (2 in. / 3 in.) 2PPS-xxBL/3PPS-xxBL, 2PPS-xxL/3PPS-xxL Elbow 2PPS-E90(B)L/3PPS-E90(B)L, 2PPS-E45(B)L/3PPS-E45(B)L Termination** 2PPS-E90(B)L/3PPS-E90(B)L, 2PPS-T(B)L/3PPS-T(B)L Bird Screen 2PPS-BG/3PPS-BG Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenylsulfone) in non-metallic venting system is prohibited. WARNING 40/80 CPVC or PP. • This Water Heater must be vented with plastic pipe materials as specified in the table below. Vent installations in Canada which utilize plastic vent systems must comply with ULC S636. [Exhaust Vent / Air Intake] Venting the Water Heater

• Follow all general venting guidelines as outlined in this manual. • Clearance described in this document is the minimum recommendation/required distance. Take appropriate clearance according to the situations of the site. • Make sure the vent system is gas tight and will not leak. • Support the vent pipe with hangers at regular intervals as specified by these instructions or the instructions of the vent manufacturer. • All piping must be fully supported. Use pipe hangers at a minimum of 3 ft (0.9 m) intervals. Exhaust Flex Chimney Lining Kit (3 in.): 3PPS-FKL, Flex Length (3 in.): 3PPS-FLEXxx Intake Aluminum Flex Length (3 in.): 3DFA-xx, Coupler (3 in.): 3DFA-FCP Exhaust & Intake* Elbow (3 in.): 3PPS-E45L, 3PPS-E90L, Single-Wall Pipe (3 in.): 3PPS-xxL Appliance Adapter for PVC Coupler (2 in.): 2PPS-ADL, Increaser: 2PPS-X3L - DuraVent® - Flex Through Chimney w/ Air Intake Exhaust Chimney Kit (3 in.): IFCK03xx, Flexible Pipe PP (3 in.): IFVL03xxx Intake Termination**: ISELL0387UV, ISTT0320, Bird Screen: IASPP03 Exhaust & Intake* Single Wall Pipe (3 in.): ISVL03xx(UV), ISEP03xx Elbow (3 in.): ISELL0387UV, ISELL0345UV, ISEL0387, ISEL0345, Increaser: ISIA0203 - Centrotherm - lnnoFlue® PP * Recommended items. ** Applicable vent termination are “87° elbow” or “Tee type”. Concentric vent termination of polypropylene are prohibited. CARBON MONOXIDE POISONING • Failure to properly seal the vent system could cause flue products to enter the living space. • (For flexible pipe for chimney) Handle the flexible vent carefully. Dropping, Crushing and Stacking may cause damage, and may result in fires, property damage or exposure to Carbon Monoxide. WARNING NOTE Covering non-metallic vent pipe and fittings with thermal insulation is prohibited. For 2 in. flexible PP material • Flex Vent 2 in. Conversion Kit must be used when using 2 in. flexible PP pipe for vent pipe installation. Refer to the instructions provided with Flex Vent 2 in. Conversion Kit for additional detail. • During the installation of Flex Vent 2 in. Kit, ambient temperatures must be greater than 40°F (5°C). Afterwards, installation site ambient temperature must be greater than -4°F (-20°C). Flex vent pipe breakage may occur if these temperature requirements are not observed. • Only listed manufacturer specified vent parts may be used for this Water Heater. • Use only solid PVC / CPVC (schedule 40) or PP pipe. • 2 in. or 3 in. schedule 80 pipe may also be used on this Water Heater, however the Btu/h input of the Water Heater will be reduced by up to 9%. • Maintain the same vent pipe diameter from the Water Heater flue to the termination. • In Canada, plastic vent systems must be certified to ULC S636. The components of the certified vent system must not be interchanged with other vent systems or unlisted pipe/fittings. • In Canada, specified primers and glues of the ULC S636 certified vent system must be from a single system manufacturer and not intermixed with other system manufacturer’s vent system parts. NOTE Do not use the Water Heater to support the vent piping. For flexible pipe for chimney • During the installation, ambient temperatures must be greater than 40 °F (5 °C). Afterwards, installation site ambient temperature must be greater than -4 °F (-20 °C). Flexible vent pipe breakage may occur if these temperature [Information regarding certified “Flexible vent pipe and connections”] - Flex Vent 2 in. Kit – 25 ft (1824) • Do not intermingle any other venting material with allowable polypropylene venting mentioned. • The Btu/h input of the Water Heater will be reduced by up to 9% when maximum vent length. Standard(s) ULC-S636-08 Standards for type BH Gas Venting Systems Product 25 ft - Flex Pipe 2 in. - LE, Flex Vent 2 in. Rigid 45 Elbow Set - LE Brand name Living Engineering Co,Ltd. - Flex Vent 2 in. Kit – 35 ft (1824-1) Standard(s) ULC-S636-08 Standards for type BH Gas Venting Systems Product 35 ft - Flex Pipe 2 in. - CES, Flex Vent 2 in. Rigid 45 Elbow Set - CES Brand name Centrotherm - lnnoFlue® requirements are not observed. • Only listed manufacture specified vent parts may be used for this appliance. Refer to the manufacture’s literature for detailed information. Venting the Water Heater

1. Continue to insert the Vent Pipe until it reaches to the base of the Water Heater Exhaust and Intake Flue. • The Vent Pipe will be inserted approximately 2.3 in. (60 mm). 2. Secure the Vent Pipe by tightening the band using a screwdriver. • The tightening torque shall be the following: - For PVC/CPVC pipe: between 16 and 20 in lb - For PP pipe: between 12 and 15 in lb Exhaust and Intake Flue Screwdriver - Flat head - Box wrench (5/16 in.) Vent Pipe For PVC/CPVC/PP material • When preparing and assembling the pipe, follow instructions as provided by the pipe manufacturer. In general, the following practices must be observed: - Squarely cut all pieces of pipe. - ‌Remove all burrs and debris from joints and fittings. - ‌All joints must be properly cleaned, primed, and cemented. Use only cement and primer approved for use with the pipe material as outlined on page 17. • PVC, CPVC or PP pipe has been approved for use on this Water Heater with zero clearance to combustibles. • The pipe shall be installed so that the first 3 ft (0.9 m) of pipe from the Water Heater flue outlet is readily accessible for visual inspection. For 2 in. flexible PP material • Flex Vent 2 in. Kit may be used only in accordance with the installation manual included with the kit. • The 2 in. flex vent application is only suitable for vertical vent configuration. • Flex Vent 2 in. Kit can be installed at zero clearance to combustible materials. • The Water Heater can be started up immediately after Flex Vent 2 in. Kit is installed and inspected. • Flex Vent 2 in. Kit systems expand and contract slightly during heating cycles and must be installed following included instructions. • Flex Vent 2 in. Kit cannot be painted. • When installing N-Flex vent, pitch is required as detailed in Flex Vent 2 in. Kit installation manual. For flexible pipe for chimney • Every venting system must be properly planned and installed for optimum performance and safety. A flexible pipe installation always begins with an inspection of the existing masonry chimney (Chimney must be clean, sized correctly, properly constructed and in good condition, if being installed in a chimney as a liner). Inspect chimney to make certain it is constructed according to the latest revision of the NFPA211. Local codes may differ from this code and should be checked. Where there is a conflict, the local code will prevail. In Canada refer to the National Building Code or CSA-A405 as applicable. • Refer to manufacturer’s instructions for assembly of all flexible components including the chimney cap and adaptor to rigid pipe at base of masonry Chimney. • Ensure none of the vent pipes and chimneys are damaged or blocked. • Do not use an existing chimney as a raceway for a flue pipe if another appliance or fireplace is vented through the chimney, and do not have any connections inside the chimney chase. • When using an inoperative chimney as a means of a chase for the vent system, the surrounding space within the chimney cannot be used to draw combustion air or vent another appliance. • The remaining space surrounding a chimney liner, the flexible pipe within a masonry, metal or factory-built flue shall not be used to supply combustion air to the Water Heater. A separate combustion air intake pipe routed back to the Water Heater can be used in the remaining space if required, the Water Heater venting system is approved for zero clearance, and can be run directly beside the combustion air intake pipe. Bolt or screw joints together to avoid sag. • Flexible pipe vertical offsets must not exceed 45° and are limited to a maximum number of 2. • Connect flue pipe to the chimney with the shortest possible length of flue pipe. • Slope the horizontal vent 1/4 in. upwards for every 12 in. (300 mm) toward the chimney from the Water Heater. • Ensure at least 3 ft (0.9 m) or more distance between the near edge of the air intake pipe or exhaust pipe to the inside corner of a wall. Inside corner 2 ft (0.6 m)* or more 1 ft (0.3 m) or more Vertical Clearance** * The clearance between intake and exhaust terminations must be installed in accordance with page 26 for horizontal vent termination. ** Clearance requirement is in accordance with page 24. This vertical clearance must be considered to prevent exhaust accumulation under the soffit. Venting the Water Heater

NOTE • When adjusting the DIP switches for longer vent runs, the Btu/h input of the Water Heater will be reduced by up to 9%. • Do not change any other DIP switches. Maximum Vent Length Configurations (For PVC/ CPVC/PP material) • The maximum vent length when using 2 in. (50 mm) pipe is 65 ft (20 m). • The maximum vent length when using 3 in. (75 mm) pipe is 150 ft (46 m). Both maximum lengths are reduced by the number of elbows used, as shown in the following table: Vent diameter Maximum equivalent vent length*1 V (Vertical) + H (Horizontal) Maximum # of elbows*2 Equivalent length 2 in. (50 mm) 65 ft (20 m) 6 90° elbow: 5 ft (1.5 m) 3 in. (75 mm) 150 ft (46 m) 15 45° elbow: 3 ft (0.9 m) *1 The maximum vent length includes elbows. *2 Not including the termination. • Check and confirm that there is no tension to the flexible pipe by hanging or suspending of anything. • Check vent piping at least once a season. Verify vent pipe connections to chimney are secure and no obstructions are present. If vent piping shows sign of leaking, replace it immediately. • This Water Heater has been designed to be vented with either 2 in. (50 mm) or 3 in. (75 mm) PVC, CPVC, PP, or 3 in. (75 mm) flexible pipe for chimney. If you use Flex Vent 2 in. Conversion Kit, you must use 2 in. flexible PP. • The minimum total vent length including horizontal and vertical vent runs should not be less than: - PVC/CPVC/PP, 3 in. (75 mm) flexible pipe for chimney: 3 ft (0.9 m) - 2 in. flexible PP: 5 ft (1.5 m) • The Water Heater can be adjusted to accommodate longer vent runs; refer to the table below. Do not exceed the maximum vent length. • Disconnect the electrical power and then adjust the DIP switches according to the vent condition noted in the tables below. Refer to page 58 for the location of the DIP switch bank and how to change the DIP switches. Failure to perform this step will result a “73” code displayed on the Remote Controller and a cease in operation. If this occurs, disconnect, then reconnect the electrical power to the Water Heater to reset the system. • Do not store hazardous or flammable substances near the vent termination and check that the termination is not blocked in any way. • Steam or condensed water may come out from the vent termination. Select the location for the termination as to prevent injury or property damage. • If snow is expected to accumulate, make sure the termination will not be covered with snow or hit by falling lumps of snow. • The vent for this appliance shall not terminate: i) over public walkways; or ii) near soffit vents or crawl space vents or other areas where condensate or vapor could create a nuisance or hazard or cause property damage; or iii) where condensate vaper could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment. • (For PVC/CPVC/PP material) A bird screen must be installed on the vent terminations to prevent debris or animals from entering the piping. These screens are not supplied with the Water Heater and must be purchased separately. 6.2.4 Maximum Vent Length • The following termination can also be used. - Termination Manufacturer: IPEX Management Inc. - Item description NOTE Below are additional models approved for use by the manufacturer and supplied by IPEX. Refer to the IPEX literature or web site for additional details. * Universal Concentric Vent Kit : #397256 - PVC System 1738 #196256 - PVC System 636 #197256 - CPVC System 636 ** Low Profile Termination Kit : #397984 - 2” PVC System 1738 #397985 - 3” PVC System 1738 #196984 - 2” PVC System 636 #196985 - 3” PVC System 636 Item Stock Code Universal Concentric Vent Kit (UCVK)* (PVC ULC S636/UL 1738 - Certified for use in both Canada and USA) 1819 (397007) IPEX Low Profile Termination Kit** (PVC ULC S636/UL 1738 - Certified for use in both Canada and USA) 2 in. 1820 (397100) 3 in. 1820-1 (397101) Vent Material Bird Screen Parts # 2 in. (50 mm) PVC or CPVC Pavilion Stock Code: 1816 3 in. (75 mm) PVC or CPVC Pavilion Stock Code: 1817 Centrotherm - 2 in. (50 mm) PP IASPP02 Centrotherm - 3 in. (75 mm) PP IASPP03 DuraVent - 2 in. (60 mm) PP 2PPS-BG DuraVent - 3 in. (80 mm) PP 3PPS-BG Venting the Water Heater

[Vent length Calculation example] Step 1: Vent Diameter 2 in. Step 2: Straight pipe length (Vertical length + Horizontal length) 17 ft Step 3: Number of elbows 90° elbows: 2 45° elbows: 2 Step 4: Calculate equivalent length 90° elbows: 2 × 5 ft = 10 ft 45° elbows: 2 × 3 ft = 6 ft Step 5: Total vent length (Add Step 2 and Step 4 together) 17 ft + 16 ft = 33 ft Step 6: Check [DIP Switch Adjustment] and select DIP switch settings. ②[33 ft or more using 2 in. (50 mm) pipe] (i.e., turn ON DIP switch #7) Maximum Vent Length Configurations (For flexible pipe for chimney) [DuraVent® - Flex Through Chimney w/ Air Intake (Only 3 in.)] The vent length condition setting depends on the flexible pipe length, the rigid pipe length and number of elbows. Calculate an each ventilation system equivalent length, then adjust the DIP switch. Here • Equivalent vent length calculation example: [Example 1] - Vent Size: 3 in. - V (Vertical length): 20 ft - H (Horizontal length): 6 ft - 90° elbow: 2 1 ft × 20 + 1 ft × 6 + 5 ft × 2 = 36 ft Total equivalent length ≤ 50 ft Select “Short length” Maximum Vent Length Configurations (For Flex Vent 2 in. Conversion Kit) Maximum Vent Length Example: • Actual Vent Length = 13 ft (3.9 m) (with DIP switch set at “Short length” condition) • Actual Vent Length = 25 ft (7.5 m) (with DIP switch set at “Long length” condition) [Example 2] - Vent Size: 3 in. - V (Vertical length): 35 ft - H (Horizontal length): 10 ft - 90° elbow: 3 1 ft × 35 + 1 ft × 10 + 5 ft × 3 = 60 ft 50 ft < Total equivalent length ≤ 75 ft Select “Long length” Vent length condition DIP switches #7 #8 ①Less than 33 ft using 2 in. (50 mm) pipe OFF OFF ②33 ft or more using 2 in. (50 mm) pipe ON OFF ③Less than 75 ft using 3 in. (75 mm) pipe OFF ON ④75 ft or more using 3 in. (75 mm) pipe ON ON Here Vent length DIP switches #7 #8 Short length 5 ft (1.5 m) - 15 ft (4.5 m) OFF OFF Long length 15 ft (4.5 m) - 35 ft (10.5 m) ON OFF Vent length condition DIP switch #7 Maximum equivalent vent length* V (Vertical) + H (Horizontal) Equivalent length Short length OFF < 50 ft (15 m) Flexible pipe: 1 ft (0.3 m) Rigid pipe: 1 ft (0.3 m) 90° elbow: 5 ft (1.5 m) 45° elbow: 3 ft (0.9 m) Long length ON 50 ft (15 m)–75 ft (22.5 m) * The maximum vent length includes elbows. Venting the Water Heater

H V Slope the Vents Upward 2PPS-X3L (DuraVent®) 2PPS-ADL (DuraVent®) 2 in. PVC/CPVC coupler 2 in. PVC/CPVC pipe • Equivalent vent length calculation example: [Example 1] - Vent Size: 3 in. - V (Vertical length): 25 ft - H (Horizontal length): 5 ft - 87° elbow: 2 1 ft × 25 + 1 ft × 5 + 5 ft × 2 = 40 ft Total equivalent length ≤ 50 ft Select “Short length” [Example 2] - Vent Size: 3 in. - V (Vertical length): 30 ft - H (Horizontal length): 10 ft - 87° elbow: 3 1 ft × 30 + 1 ft × 10 + 5 ft × 3 = 55 ft 50 ft < Total equivalent length ≤ 75 ft Select “Long length” [Centrotherm® - Flex Through Chimney w/ Air Intake (Only 3 in.)] The vent length condition setting depends on the flexible pipe length, the rigid pipe length and number of elbows. Calculate an each ventilation system equivalent length, then adjust the DIP switch. Here Vent length condition DIP switch #7 Maximum equivalent vent length* Equivalent length Short length OFF Exhaust vent V (Vertical) + H (Horizontal): < 50 ft (15 m) Air Intake: < 50 ft (15 m) Flexible pipe: 1 ft (0.3 m) Rigid pipe: 1 ft (0.3 m) 90° elbow: 5 ft (1.5 m) 45° elbow: 3 ft (0.9 m) Long length ON Exhaust vent V (Vertical) + H (Horizontal): 50 ft (15 m)–75 ft (22.5 m) Air Intake: 50 ft (15 m)–75 ft (22.5 m) * The maximum vent length includes elbows. Venting the Water Heater

3 in. Elbow ISIS0203 (Centrotherm®) H V Slope the Vents Upward Slope the Vents Upward 6.3 Select a Vent Type Combustion air is supplied from the outdoors. Combustion air and exhaust are seperate vent pipes. Combustion air Exhaust Direct Vent Combustion air is supplied from the surrounding indoor air. Combustion air Exhaust Non-Direct Vent (with SV Conversion Kit) Combustion air is supplied from the surrounding indoor air. Combustion air Exhaust Non-Direct Vent (with Flex Vent 2 in. Conversion Kit) The Water Heater can be installed outside using the Outdoor Vent Cap. Combustion air Exhaust Outdoor (with Outdoor Vent Cap) This Water Heater is suitable for Common Vent System. To make a Common Vent System, refer to the Common Vent installation manual or contact Pavilion Customer Center at https:// www.peerlessboilers.com/ or 1-855-443-8468 for details. Common Vent Combustion air Exhaust Exhaust gasses and combustion air must not be combined into a single PVC pipe using a “Y” fitting. WARNING Combustion air Exhaust Single Pipe Venting the Water Heater

6.4.1 Clearance Requirements from Vent Terminations to Building Openings [When supplying combustion air from the outdoors] Vent Terminal Air Supply Inlet Area Where Terminal is Not Permied Less than 10 3 or more Mechanical air supply inlet [ K for US ] Less than 2 Venlated soffit located [ D ] Ref Description Canadian Direct Vent Installations 1 US Direct Vent Installations 2 A Clearance above grade, veranda, porch, deck, or balcony 12 in. (30 cm) 12 in. (30 cm) B Clearance to window or door that may be opened 6 in. (15 cm) for appliances ≤ 10,000 Btuh (3kW), 12 in. (30 cm) for appliances > 10,000 Btuh (3kW) and ≤ 100,000 Btuh (30 kW), 36 in. (91 cm) for appliances > 100,000 Btuh (30 kW) 6 in. (15 cm) for appliances ≤ 10,000 Btuh (3kW), 9 in. (23 cm) for appliances > 10,000 Btuh (3kW) and ≤ 50,000 Btuh (15 kW), 12 in. (30 cm) for appliances > 50,000 Btuh (15 kW) C Clearance to permanently closed window * * D Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the terminal * * E Clearance to unventilated soffit * * F Clearance to outside corner * * G Clearance to inside corner * * H Clearance to each side of center line extended above meter/regulator assembly * * I Clearance to service regulator vent outlet Above a regulator within 3 ft (91 cm) horizontally of the vertical center line of the regulator vent outlet to a maximum vertical distance of 15 ft (4.5 m) * J Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance 6 in. (15 cm) for appliances ≤ 10,000 Btuh (3kW), 12 in. (30 cm) for appliances > 10,000 Btuh (3kW) and ≤ 100,000 Btuh (30 kW), 36 in. (91 cm) for appliances > 100,000 Btuh (30 kW) 6 in. (15 cm) for appliances ≤ 10,000 Btuh (3kW), 9 in. (23 cm) for appliances > 10,000 Btuh (3kW) and ≤ 50,000 Btuh (15 kW), 12 in. (30 cm) for appliances > 50,000 Btuh (15 kW) K Clearance to a mechanical air supply inlet 6 ft (1.83 m) 3 ft (91 cm) above if within 10 ft (3 m) horizontally L Clearance above paved sidewalk or paved driveway located on public property 7 ft (2.13 m)† * M Clearance under veranda, porch, deck, or balcony 12 in. (30 cm)‡ * 1 In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code 2 In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code † A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings. ‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor. * Clearance in accordance with local installation codes and the requirements of the gas supplier. Clearance to opposite wall is 24 in. (60 cm). • All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code, ANSI Z223.1 and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1. Venting the Water Heater

• Use a condensation drain if necessary. • In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally vented gas fuel equipment. Refer to the page 4 for more detail information. Possible Orientations ≥ 3ft Min. 3 in. (75 mm) pipe and 2 in. × 3 in. Increaser couplings required when using plastic horizontal hood terminations. Increaser couplings must be installed just above the heaters vent flue connections. Slope the horizontal exhaust vent 1/4 in. upwards for every 12 in. (305 mm) toward the termination. 12 in. (305 mm) above grade or over maximum snow level 12 in. (305 mm) above grade or over maximum snow level Ceiling Interior Wall (e.g. Hood Termination installation) (e.g. Hood Termination installation) (e.g. Low Profile Termination installation) Exhaust 3 in. (75 mm) or 2 in. (50 mm) Intake 3 in. (75 mm) or 2 in. (50 mm) Intake* Intake Overhang Exhaust* Exhaust Exterior Wall If 3 ft (0.9 m) distance between Intake and Exhaust cannot be ensured, the installation can be carried out only in the installation method shown in “Alternate Horizontal Vent Termination”. The PVC/CPVC elbow may be used in place of Hood Termination as the horizontal vent termination. Hood Termination 3 in. (75 mm) * When choosing intake and exhaust terminations, you must use the same type of elbow (i.e. both 90° elbows). This will help with proper combustion by putting both terminations in the same pressure zone. Hanger Straps ≥ 12 in. (305 mm) Min. 2 in. or 3 in. Low Profile Termination 6.4.2 Horizontal Vent Termination Venting the Water Heater

(When 3 ft (0.9 m) distance between Intake and Exhaust cannot be ensured.) • Insert the bird screen into the 90° elbow installed vertically downward. • Intake and exhaust should face the same direction. Intake and exhaust should keep the same pressure zone. • If the distance between the air inlet and exhaust vent terminations is too short, the Water Heater will draw in the exhaust gases through the intake. There is a risk of inadequate combustion air for the Water Heater, thus increasing Carbon Monoxide (CO) emissions and noise due to vibration. • Termination elbows must be oriented vertically, pointing directly downward. Attempts to prevent exhaust air from entering the air inlet by angling termination elbows in directions other than directly downward will increase the risk of freezing. • Reversing the air intake and exhaust pipes is not allowed. Carbon Monoxide (CO) emissions and noise due to vibration will increase. WARNING NOTE Do not use Hood termination. Exhaust Intake Interior View Exterior View Interior View Exterior View Interior View Exterior View Exhaust Intake Exhaust Intake NOTE Upper side is exhaust, lower side is intake. The reverse orientation is not allowed. NOTE The side distant from wall is intake, the side near the wall is exhaust. The reverse orientation is not allowed. ≥ 2 ft Min. The distance is measured at inside of pipe to inner dimension. ≥ 1  Min. The distance is measured at inside of pipe to inner dimension. ≥ 1  Min. The distance is measured at the outlets of intake port (terminal) and exhaust port (terminal). ≥ 3 in. Min. (between outside wall and termination) ≥ 3 in. Min. (between outside wall and terminaon) ≥ 3 in. Min. (between outside wall and terminaon) Venting the Water Heater

3 in. pipe 2 in. × 3 in. Increaser coupling When using 3 in. Concentric Termination, 3 in. (75 mm) pipe and 2 in. - 3 in. Increaser couplings are required. Increaser couplings must be installed just above the Water Heaters vent flue connections. * The length of the pipe between the Increaser couplings and the Exhaust and Intake Flue of the Water Heater should be up to 6 in. (152 mm). Insert Bird Screen in End of Termination. Bird Screen is not supplied with water heater. It is included in PVC Concentric Termination. Exhaust 2 in. (50 mm) or 3 in. (75 mm) Intake 2 in. (50 mm) or 3 in. (75 mm) Slope the horizontal vent 1/4 in. upwards for every 12 in. (305 mm) toward the termination. Hanger Straps 1 in. (25 mm) to 2 in. (50 mm) (e.g. 2 in. Concentric Termination installation) 2 in. or 3 in. Concentric Termination Install a securing strap to prevent movement of the termination. For Horizontal PVC Concentric Termination - PVC/CPVC Material Only • The concentric termination may be shortened, but not lengthened from its original factory supplied length. • 2 in. (50 mm) or 3 in. (75 mm) PVC or CPVC pipe may be used with the concentric termination. Maintain the same vent pipe diameter from the Water Heater flue to the termination. • Use a condensation drain if necessary. • In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally vented gas fuel equipment. Refer to the page 4 for more detail information. For Universal Concentric Vent Kit 1 in. (25 mm) to 2 in. (50 mm) Universal Concentric Vent Insert Bird Screen in End of Termination. Bird Screen is not supplied with water heater. 3 in. × 2 in. Reducer bushing Venting the Water Heater

Roof Flashing Storm Collar Roof Flashing Storm Collar ≥ 3 ft Min. ≥ 3 ft Min. 12 in. over maximum snow level 12 in. over maximum snow level Support Hanger Strap 2 in. pipe* 3 in. pipe 2 in. × 3 in. Increaser coupling • A short horizontal section is required to prevent debris from falling into the water heater. • When using a horizontal section, slope the horizontal vent 1/4 in. upwards for every 12 in. (305 mm) toward the termination to drain condensate. When the vent penetrates a floor or ceiling and is not running in a fire rated shaft, a firestop and support is required. *About the termination • When choosing intake and exhaust terminations, you must use the same type of elbow (i.e. both 90° elbows). This will help with proper combustion by putting both terminations in the same pressure zone. • Insert Bird Screen in End of 90° Elbow. Bird Screen is not supplied with water heater, order separately. • To prevent excessive condensation formation, only the vent termination should be located on the exterior of the building. When the vent termination is located not less than 8 ft (2.4 m) from a vertical wall or similar obstruction, terminate above the roof at least 2 ft (0.6 m), but not more than 6 ft (1.87 m), in accordance with the National Fuel Gas Code ANSI Z223.1 / NFPA 54 or Natural Gas and Propane Installation Code CSA B149.1. Provide vertical support every 3 ft (0.9 m) or as required by the vent pipe manufacturer's instructions. Support Firestop 2 in. × 3 in. Increaser couplings are required when using 3 in. (75 mm) pipe. • The combustion air intake of any appliance • Any other building opening Firestop Firestop * * Firestop * The length of the pipe between the Increaser couplings and the Exhaust and Intake Flue of the Water Heater should be up to 6 in. (152 mm). Exhaust 2 in. (50 mm) or 3 in. (75 mm) Intake 2 in. (50 mm) or 3 in. (75 mm) 6.4.3 Vertical Vent Termination Venting the Water Heater

Exhaust 2 in. (50 mm) or 3 in. (75 mm) Intake 2 in. (50 mm) or 3 in. (75 mm) 2 in. or 3 in. Concentric Termination Plastic Rain Cap* Increaser coupling* * Not supplied with water heater, order separately. 12 in. (305 mm) above grade or over maximum snow level. ≥ 3 ft Min. 3 in. (75 mm) pipe and 2 in. × 3 in. Increaser coupling requires when using Plastic Rain Cap. Plastic Rain Cap 3 in. (75 mm) pipe 2 in. (50 mm) pipe 2 in. × 3 in. Increaser coupling • The combustion air intake of any appliance • Any other building opening 2 in. pipe** 3 in. pipe 3 in. pipe 2 in. × 3 in. Increaser coupling When using 3 in. Concentric Termination, 3 in. (75 mm) pipe and 2 in. × 3 in. Increaser couplings are required. Increaser couplings need to be used just prior to 3 in. Concentric Termination. ** The length of the pipe between the Increaser couplings and the Exhaust and Intake Flue of the Water Heater, and the concentric termination vent pipe connections should be up to 6 in. (152 mm). For Vertical PVC Concentric Termination - PVC/CPVC Material Only • The concentric termination may be shortened, but not lengthened from its original factory supplied length. • 2 in. (50 mm) or 3 in. (75 mm) PVC or CPVC pipe may be used with the concentric termination. Maintain the same vent pipe diameter from the Water Heater flue to the termination. • Use a condensation drain if necessary. • In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally vented gas fuel equipment. Refer to the page 4 for more detail information. Venting the Water Heater

[Other than Direct Vent] Vent Terminal Air Supply Inlet Area Where Terminal is Not Permitted Mechanical air supply inlet [ K for US ] Ventilated soffit located [ D ] Less than 2 ft Less than 10 ft 3 ft or more Ref Description Canadian Non-Direct Vent Installations 1 US Non-Direct Vent Installations 2 A Clearance above grade, veranda, porch, deck, or balcony 12 in. (30 cm) 12 in. (30 cm) B Clearance to window or door that may be opened 6 in. (15 cm) for appliances ≤ 10,000 Btuh (3kW), 12 in. (30 cm) for appliances > 10,000 Btuh (3kW) and ≤ 100,000 Btuh (30 kW), 36 in. (91 cm) for appliances > 100,000 Btuh (30 kW) 4 ft (1.2 m) below or to side of opening; 1 ft (300 mm) above opening C Clearance to permanently closed window * * D Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the terminal * * E Clearance to unventilated soffit * * F Clearance to outside corner * * G Clearance to inside corner * * H Clearance to each side of center line extended above meter/regulator assembly * * I Clearance to service regulator vent outlet Above a regulator within 3 ft (91 cm) horizontally of the vertical center line of the regulator vent outlet to a maximum vertical distance of 15 ft (4.5 m) * J Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance 6 in. (15 cm) for appliances ≤ 10,000 Btuh (3kW), 12 in. (30 cm) for appliances > 10,000 Btuh (3kW) and ≤ 100,000 Btuh (30 kW), 36 in. (91 cm) for appliances > 100,000 Btuh (30 kW) 4 ft (1.2 m) below or to side of opening; 1 ft (300 mm) above opening K Clearance to a mechanical air supply inlet 6 ft (1.83 m) 3 ft (91 cm) above if within 10 ft (3 m) horizontally L Clearance above paved sidewalk or paved driveway located on public property 7 ft (2.13 m)† * M Clearance under veranda, porch, deck, or balcony 12 in. (30 cm)‡ * 1 In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code 2 In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code † A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings. ‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor. * Clearance in accordance with local installation codes and the requirements of the gas supplier. Clearance to opposite wall is 24 in. (60 cm). • All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code, ANSI Z223.1 and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1. 6.5 Vent Pipe Installation (Non-Direct Vent) Venting the Water Heater

NOTE Flex Vent 2 in. Conversion Kit must be installed in the proper direction as shown above. • When installing this Water Heater in an area with a large amount of lint such as a commercial Laundromat, direct vent (“DV”) system must be used. The “SV” configuration (using SV Conversion Kit) and Flex Vent 2 in. Conversion Kit are prohibited. • When installing this Water Heater in a mobile home, all combustion must be drawn directly from the outdoors. The “SV” configuration (using SV Conversion Kit) and Flex Vent 2 in. Conversion Kit are prohibited. DANGER • SV Conversion Kit is required for the air intake. • It is recommended a carbon monoxide alarm installed in same room space as Water Heater when supplying combustion air from the indoors. To prevent possible personal injury or death due to asphyxiation, common venting with other manufacturer’s induced draft appliances is not allowed. WARNING Failure to change DIP switch #3 and use SV Conversion Kit could result in a fire or explosion causing property damage, personal injury or death. Refer to the instructions provided with the conversion kit for additional details. WARNING For SV Conversion Kit 1. Secure the “Flex Vent 2 in. Conversion Kit” to top of the Water Heater. (Refer to the instructions provided with “Flex Vent 2 in. Conversion Kit” for additional detail.) 2. Disconnect the electrical power and then turn ON DIP switch #2 and #3. Refer to page 58 for the location of the DIP switch bank and how to change the DIP switches. Failure to perform this step will result a “73” code displayed on the Remote Controller and a cease in operation. If this occurs, disconnect, then reconnect the electrical power to the Water Heater to reset the system. Here • Disconnect the erectrical power and then turn ON DIP switch #3 if combustion air will be supplied from the indoors. Refer to page 58 for the location of the DIP switch bank and how to change the DIP switch. Failure to perform this step will result a “73” code displayed on the Remote Controller and a cease in operation. If this occurs, disconnect, then reconnect the electrical power to the Water Heater to reset the system. Here For Flex Vent 2 in. Conversion Kit Flex Vent 2 in. Conversion Kit Venting the Water Heater

NOTE Provide adequate combustion air so as to not create negative pressure within the building. • Supply combustion air to the Water Heater as per the National Fuel Gas Code, ANSI Z223.1 - latest edition and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1 - latest edition. • A minimum free area of each opening: • If the Water Heater is installed in a mechanical closet, a minimum of permanent clearance of 4 in. or more in front of the Water Heater is required. In order to facilitate maintenance and repair, a minimum clearance (24 in. or more) should be met. • If combustion air will be provided through a duct, size the duct to provide 70 ft3 of fresh air per minute. H H W W Provide two permanent openings to allow circulation of combustion air. (e.g. SV Conversion Kit installation) Indoor make up air is provided 200 in.² example 20 in. (W) × 10 in. (H) Outdoor make up air is provided Direct or Vertical ducts 50 in.² example 10 in. (W) × 5 in. (H) Horizontal ducts 100 in.² example 20 in. (W) × 5 in. (H) Venting the Water Heater

• Use a condensation drain if necessary. • In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally vented gas fuel equipment. Refer to the page 4 for more detail information. 2 in. × 3 in. Increaser coupling is required when using 3 in. (75 mm) pipe. Exhaust 2 in. (50 mm) or 3 in. (75 mm) Intake 2 in. conversion Kit Inlet Screen ≥ 3 in. Min. • Insert Bird Screen in End of Termination. Bird Screen is not supplied with water heater, order separately. • It is not necessary to use Bird Screens with the Hood Termination. Either a tee or the Hood Termination termination may be used for the vent termination. Hanger Straps Slope the horizontal vent 1/4 in. upwards for every 12 in. (305 mm) toward the termination. • Above Grade • Maximum snow level ≥ 12 in. (305 mm) Min. 2 in. pipe* 3 in. pipe 2 in. × 3 in. Increaser coupling * The length of the pipe between the Increaser couplings and the Exhaust and Intake Flue of the Water Heater should be up to 6 in. (152 mm). Venting the Water Heater

Intake Exhaust 2 in. (50 mm) or 3 in. (75 mm) 2 in. conversion Kit Inlet Screen Hanger Strap Firestop When the vent penetrates a floor or ceiling and is not running in a fire rated shaft, a firestop and support is required. ≥ 3 ft Min. Roof Flashing Storm Collar 12 in. over maximum snow level When the vent termination is located not less than 8 ft (2.4 m) from a vertical wall or similar obstruction, terminate above the roof at least 2 ft (0.6 m), but not more than 6 ft (1.87 m), in accordance with the National Fuel Gas Code ANSI Z223.1 / NFPA 54 or Natural Gas and Propane Installation Code CSA B149.1. Provide vertical support every 3 ft (0.9 m) or as required by the vent pipe manufacturer's instructions. • A short horizontal section is required to prevent debris from falling into the water heater. • When using a horizontal section, slope the horizontal vent 1/4 in. upwards for every 12 in. (305 mm) toward the termination to drain condensate. *About the termination • Insert Bird Screen in End of 90° Elbow. Bird Screen is not supplied with water heater, order separately. • To prevent excessive condensation formation, only the vent termination should be located on the exterior of the building. * • The combustion air intake of any appliance • Any other building opening 2 in. × 3 in. Increaser coupling is required when using 3 in. (75 mm) pipe. * The length of the pipe between the Increaser couplings and the Exhaust and Intake Flue of the Water Heater should be up to 6 in. (152 mm). 2 in. pipe* 3 in. pipe 2 in. × 3 in. Increaser coupling For SV Conversion Kit Venting the Water Heater

The 2 in. Flex Vent application is only suitable for vertical vent configuration. WARNING *About the termination To prevent excessive condensation formation, only the vent termination should be located on the exterior of the building. ≥ 3 ft Min. * When the vent termination is located not less than 8 ft (2.4 m) from a vertical wall or similar obstruction, terminate above the roof at least 2 ft (0.6 m), but not more than 6 ft (1.87 m), in accordance with the National Fuel Gas Code ANSI Z223.1/NFPA 54 or Natural Gas and Propane Installation Code CSA B149.1. Roof Flashing Storm Collar When the vent penetrates a floor or ceiling and is not running in a fire rated shaft, a firestop and support is required. Round 3 in. or 4 in. B-Vent used as chase for 2 in. flexible PP pipe Firestop The aluminum flex pipe serves as protection against damage. Exhaust 2 in. Flexible PP pipe Support Intake Flex Vent 2 in. Conversion Kit • The combustion air intake of any appliance • Any other building opening Venting the Water Heater

• When installing this Water Heater outdoors, the “Outdoor Vent Cap” must be used. • Refer to the instructions provided with Outdoor Vent Cap for additional detail. • Disconnect the electrical power and then turn ON DIP switch #2 if outdoor installation. Refer to page 58 for the location of the DIP switch bank and how to change the DIP switch. Failure to perform this step will result a “73” code displayed on the Remote Controller and a cease in operation. If this occurs, disconnect, then reconnect the electrical power to the Water Heater to reset the system. Here 6.6 Outdoor Installation 7 Connecting the Gas Supply Follow the instructions from the gas supplier. The sizing and installation of the gas system for this Water Heater, as with any gas appliance, is the sole responsibility of the installer. The installer must be professionally trained to do such work and must always follow all local and national codes and regulations. WARNING Gas Type The gas type indicated on the Water Heater’s rating plate (NG or LP) must match the type of gas being supplied to the Water Heater. Meter • The gas meter must be sized properly for the Water Heater and other gas appliances to operate properly. • Select a gas meter capable of supplying the entire Btu/h demand of all gas appliances in the building. Gas Conversions • If the supplied gas does not match the gas type on the rating plate, contact your water heater supplier for a replacement Water Heater with the proper gas type. • If a gas conversion is needed, there are conversion kits available for some models. • The conversion kit shall be installed by a qualified service agency in accordance with the manufacturer’s instructions and all applicable codes and requirements of the authority having jurisdiction. The qualified service agency is responsible for the proper installation of this kit. Improper installation of this kit will void the Pavilion Limited Warranty. Conversion kits will only be shipped directly to the Distributor or Agency performing the conversion. Regulators • Ensure that all gas regulators used are operating properly and providing gas pressures within the specified range of the Water Heater being installed. • Excess gas inlet pressure may cause serious accidents. WARNING

Pressure Test The appliance and its gas connections must be leak tested before placing the appliance in operation. • Test at test pressures equal to or less than ½ psi (3.5 kPa). • The appliance must be isolated from the gas supply piping system by closing its individual manual shut off valve during any pressure testing of the gas supply piping system. • If test pressures are in excess of 1/2 psi (3.5 kPa), the appliance and its individual shut off valve must be completely disconnected from the gas supply piping system during the test process. Pressure • Check the gas supply pressure immediately upstream at a location provided by the gas company. • Supplied gas pressure must be within the limits shown in the specifications section with all gas appliances operating. The inlet gas pressure must be within the range specified. This is for the purposes of input adjustment. Low gas pressure may cause a loss of flame or ignition failure at other appliances in the home, which may result in unburned gas in the home. Serious accidents such as fire or explosion may result. WARNING Measuring Gas Pressure In order to check the gas supply pressure to the Water Heater, a tap is provided on the gas inlet. 1. Remove the 9/32 in. hex head /Philips screw from the tap. 2. Connect a manometer using a silicon tube. 3. Open up at least two fixtures with hot water side fully. 4. Hold in the “Maximum Burner Set Button” on the circuit board. Maximum Burner Set Button Circuit Board Pipe Sizing • A gas shut off valve must be installed on the supply line. • Gas piping shall be in accordance with local utility company requirements and/or in the absence of local codes, use the latest edition of National Fuel Gas Code (NFPA54GC), ANSI Z223.1. In Canada, use the latest edition of CSA B149.1, Natural Gas and Propane installation code. • Size the gas line according to total Btu/h demand of the building and length from the meter or regulator so that the following supply pressures are available even at maximum demand. Supply Pressure Natural Gas LP Gas Min 3.5 in. W.C. 8 in. W.C. Max 10.5 in. W.C. 14 in. W.C. Flexible Connectors Flexible gas lines are not recommended unless the minimum inside diameter is ¾ in. or greater and the rated capacity of the connector is equal to or greater than the Btu/h demand of the Water Heater. Reference Tools & Sample Calculations The tables and samples below are for reference only. The professional sizing and installing the gas line should always run the appropriate calculations before all installations. NOTICE [Calculation Example] A partial set of sizing tables are printed on page 39. In cases where these tables are not appropriate, refer to the NFPA. 1. Draw a sketch of a piping system. Enter the system information. (e.g.) Point of delivery Outlet A clothes dryer 35,000 Btu/h Outlet B range/oven unit 75,000 Btu/h Outlet C water heater 199,900 Btu/h Outlet D furnace 100,000 Btu/h Gas pressures below the required minimum pressure may result in ignition failure, personal injury or death. WARNING

2. • Determine the gas type used and supply gas Pressure, and enter it. • Determine the piping material and enter it to the below. • Select the appropriate pipe sizing table from page 39 and enter it to the below. 3. • On the sketch, label the section of pipe from the point of delivery (meter or regulator) to the first tee as Section 1. • Label the section from the first tee to the second tee as Section 2, and label the section from the first tee to the third tee as Section 3. Use similar section numbers for additional sections. Gas type: Natural Pressure drop: 1.0 in. W.C. Table used: 2 Piping material: Sch 40 steel Supply gas pressure: 6 in. W.C. (e.g.) Gas type: Pressure drop: Table used: Piping material: Supply gas pressure: (e.g.) 5 ft Point of delivery 5 ft Section 2 10 ft Section 1 10 ft Section 3 5 ft 10 ft 15 ft 15 ft 5 ft Outlet A clothes dryer 35,000 Btu/h Outlet B range/oven unit 75,000 Btu/h Outlet C water heater 199,900 Btu/h Outlet D furnace 100,000 Btu/h 4. • Enter the demand is the amount of gas flowing through a section of pipe in the table below. - For natural gas, use total Btu/h rating/1000 (ft3/h). - For propane, use total Btu/h. • For each section, determine the longest piping from the point of delivery to the furthest appliance through each section. Enter this length for all pipe sections in the table below. • Round up to the lengths in the appropriate table on page 39. Read across until a capacity equal to or greater than the required demand for the section is found. Read up to find the size. Repeat for each section of piping. Enter this size in the table below. 5. • Enter the input rating for each appliance in the table below. - For natural gas appliances, enter the input rating in Btu/h/1000 (ft3/h). - For propane appliances, enter the input rating in Btu/h. • Enter the outlet length from each appliance to the point of delivery in the table below. • Round up to the lengths in the appropriate table on page 39. Read across until a capacity equal to or greater than the required demand for the section is found. Read up to find the size. Repeat for each appliance. Enter this size in the table below. Final Check 1. Turn on and operate all gas appliances including the Water Heater. 2. Check the inlet pressure at each appliance shall be such that the supply pressure at the appliance is greater than or equal to the minimum pressure required by the appliance. NOTE If all appliances are not receiving the minimum inlet pressure, the gas piping system may need to be changed. Section Demand The longest length Size 1 409.9 45 ft 1 in. 2 299.9 35 ft 1 in. 3 110 45 ft 3/4 in. 4 5 (e.g.) Section Demand The longest length Size 1 2 3 4 5 Appliance Demand Outlet length Size Outlet A 35 45 ft 1/2 in. Outlet B 75 40 ft 1/2 in. Outlet C 199.9 35 ft 3/4 in. Outlet D 100 35 ft 1/2 in. (e.g.) Appliance Demand Outlet length Size Outlet A Outlet B Outlet C Outlet D

[Gas pipe sizing tables] • These tables are for reference only. Consult gas pipe manufacturer for actual pipe capacities. • It is an example of Schedule 40 Metallic Pipe. • (Only Table 1 - 4) Values in Table are in ft3 of Gas per Hour. Contact your gas supplier for Btu/ft3 ratings. For simplification of your calculations, 1 ft3 of Gas is approximately equivalent to 1,000 Btu. 1. Maximum Natural Gas Delivery Capacity (For Less than 6 in. W.C. initial supply pressure) 0.5 in. W.C. Pressure Drop Pipe Size Length (including fittings) 10 ft 20 ft 30 ft 40 ft 50 ft 60 ft 70 ft 80 ft 90 ft 100 ft 125 ft 150 ft 175 ft 200 ft (3 m) (6 m) (9 m) (12 m) (15 m) (18 m) (21 m) (24 m) (27 m) (30 m) (38 m) (45 m) (53 m) (60 m) 1/2 in. 172 118 95 81 72 65 60 56 52 50 44 40 37 34 3/4 in. 360 247 199 170 151 137 126 117 110 104 92 83 77 71 1 in. 678 466 374 320 284 257 237 220 207 195 173 157 144 134 1 1/4 in. 1,390 957 768 657 583 528 486 452 424 400 355 322 296 275 1 1/2 in. 2,090 1,430 1,150 985 873 791 728 677 635 600 532 482 443 412 2 in. 4,020 2,760 2,220 1,900 1,680 1,520 1,400 1,300 1,220 1,160 1,020 928 854 794 2 1/2 in. 6,400 4,400 3,530 3,020 2,680 2,430 2,230 2,080 1,950 1,840 1,630 1,480 1,360 1,270 2. Maximum Natural Gas Delivery Capacity (For 6 - 7 in. W.C. initial supply pressure) 1.0 in. W.C. Pressure Drop Pipe Size Length (including fittings) 10 ft 20 ft 30 ft 40 ft 50 ft 60 ft 70 ft 80 ft 90 ft 100 ft 125 ft 150 ft 175 ft 200 ft (3 m) (6 m) (9 m) (12 m) (15 m) (18 m) (21 m) (24 m) (27 m) (30 m) (38 m) (45 m) (53 m) (60 m) 1/2 in. 250 172 138 118 105 95 87 81 76 72 64 58 53 50 3/4 in. 524 360 289 247 219 199 183 170 160 151 134 121 111 104 1 in. 986 678 544 466 413 374 344 320 300 284 252 228 210 195 1 1/4 in. 2,030 1,390 1,120 957 848 768 707 657 617 583 516 468 430 400 1 1/2 in. 3,030 2,090 1,680 1,430 1,270 1,150 1,060 985 924 873 774 701 645 600 2 in. 5,840 4,020 3,230 2,760 2,450 2,220 2,040 1,900 1,780 1,680 1,490 1,350 1,240 1,160 2 1/2 in. 9,310 6,400 5,140 4,400 3,900 3,530 3,250 3,020 2,840 2,680 2,380 2,150 1,980 1,840 3. Maximum Natural Gas Delivery Capacity (For 7 - 8 in. W.C. initial supply pressure) 2.0 in. W.C. Pressure Drop Pipe Size Length (including fittings) 10 ft 20 ft 30 ft 40 ft 50 ft 60 ft 70 ft 80 ft 90 ft 100 ft 125 ft 150 ft 175 ft 200 ft (3 m) (6 m) (9 m) (12 m) (15 m) (18 m) (21 m) (24 m) (27 m) (30 m) (38 m) (45 m) (53 m) (60 m) 1/2 in. 364 250 201 172 153 138 127 118 111 105 93 84 77 72 3/4 in. 762 524 420 360 319 289 266 247 232 219 194 176 162 151 1 in. 1,440 986 792 678 601 544 501 466 437 413 366 332 305 284 1 1/4 in. 2,950 2,030 1,630 1,390 1,230 1,120 1,030 957 898 848 751 681 626 583 1 1/2 in. 4,420 3,030 2,440 2,090 1,850 1,680 1,540 1,430 1,350 1,270 1,130 1,020 938 873 2 in. 8,500 5,840 4,690 4,020 3,560 3,230 2,970 2,760 2,590 2,450 2,170 1,970 1,810 1,680 2 1/2 in. 13,600 9,310 7,480 6,400 5,670 5,140 4,730 4,400 4,130 3,900 3,460 3,130 2,880 2,680 4. Maximum Natural Gas Delivery Capacity (For 8 - 10.5 in. W.C. initial supply pressure) 3.0 in. W.C. Pressure Drop Pipe Size Length (including fittings) 10 ft 20 ft 30 ft 40 ft 50 ft 60 ft 70 ft 80 ft 90 ft 100 ft 125 ft 150 ft 175 ft 200 ft (3 m) (6 m) (9 m) (12 m) (15 m) (18 m) (21 m) (24 m) (27 m) (30 m) (38 m) (45 m) (53 m) (60 m) 1/2 in. 454 312 250 214 190 172 158 147 138 131 116 105 96 90 3/4 in. 949 652 524 448 397 360 331 308 289 273 242 219 202 188 1 in. 1,790 1,230 986 844 748 678 624 580 544 514 456 413 380 353 1 1/4 in. 3,670 2,520 2,030 1,730 1,540 1,390 1,280 1,190 1,120 1,060 936 848 780 726 1 1/2 in. 5,500 3,780 3,030 2,600 2,300 2,090 1,920 1,790 1,680 1,580 1,400 1,270 1,170 1,090 2 in. 10,600 7,280 5,840 5,000 4,430 4,020 3,700 3,440 3,230 3,050 2,700 2,450 2,250 2,090 2 1/2 in. 16,900 11,600 9,310 7,970 7,070 6,400 5,890 5,480 5,140 4,860 4,300 3,900 3,590 3,340 5. Maximum Undiluted Propane (LP) Delivery Capacity in Thousands of Btu/h 0.5 in. W.C. Pressure Drop Pipe Size Length (including fittings) 10 ft 20 ft 30 ft 40 ft 50 ft 60 ft 80 ft 100 ft 125 ft 150 ft 175 ft 200 ft (3 m) (6 m) (9 m) (12 m) (15 m) (18 m) (24 m) (30 m) (38 m) (45 m) (53 m) (60 m) 1/2 in. 291 200 160 137 122 110 101 94 89 84 74 67 3/4 in. 608 418 336 287 255 231 212 197 185 175 155 140 1 in. 1,150 787 632 541 480 434 400 372 349 330 292 265 1 1/4 in. 2,350 1,620 1,300 1,110 985 892 821 763 716 677 600 543 1 1/2 in. 3,520 2,420 1,940 1,660 1,480 1,340 1,230 1,140 1,070 1,010 899 814 2 in. 6,790 4,660 3,750 3,210 2,840 2,570 2,370 2,200 2,070 1,950 1,730 1,570

8 Connecting the Water Supply • Installation and service must be performed by a qualified plumber. • In the Commonwealth of Massachusetts, this product must be installed by a licensed plumber or gas fitter in accordance with the Massachusetts Plumbing and Fuel Gas Code 248 CMR Sections 2.00 and 5.00. • Observe all applicable codes. • It is recommended to install insulation to the hot water line and the hot water return line for comfort and energy saving. • Components used in domestic piping must meet requirements in NSF/ANSI 61 Drinking Water System Components. • With a Recirculation System, the water from the Water Heater to the fixtures can be warmed up in advance.You can get hot water to your fixtures more quickly with less waste of water. • See the Owner’s Guide for more information about what you can do. • Perform water treatment properly because Scale build-up is more likely to occur in a Recirculation System. • (Only when conforming to California Code of Regulations Title 24 Part 6) Install the plumbing in accordance with the regulation. • Only one recirculation loop shall be installed in the recirculation system. Water Heater 8.1 Overview of the Recirculation System

(*1) Ball Valve for Return Line Hot Water Supply Line Hot Water Return Line Hose Bibb (To assist with purging air in the system) Expansion Tank (Install according to local code if necessary) Water Heater Water Heater (Master) Water Heater Cold Water Supply Check Valve (Back Flow Preventer) Thermo-sensor (For Title 24 if necessary) Fixture Fixture Fixture Remote Controller On Demand Switch (*6) (For on demand usage or Title 24 if necessary) Quick Connect Cord On Demand Switch Remote Controller (*1) Isolation Valve (Service Valve Kit): The manufacturer stocks the Isolation Valve(Service Valve Kit) for easy water line installation. The Isolation Valve (Service Valve Kit) is necessary for flushing the Heat Exchanger. This valve kit includes an integrated shut-off and service valve with unions and a pressure relief valve. (*2) Air Vent and Air Out: In order to prevent air locking in the recirculation pump, air out and air vent shall be installed near the Water Heater on the return line. (*3) Valve: For maintenance of expansion tank. (*4) Expansion Tank: Confirm manufacture’s specification (e.g. Maximum temperature resistance at least 200°F (93°C), Tank volume, Maximum pressure) for the expansion tank. Without this expansion tank, the increased volume of water created by thermal expansion may be relieved from a pressure relief valve. In order to prevent this, the expansion tank shall be installed on the return line. The charged pressure (PSI) of expansion tank shall be set to cold water supply pressure for correct operation. (*5) Pressure Relief Valve: The increased volume of water created by thermal expansion may be relieved from the Pressure Relief Valve in order to prevent damage to the system. It is normal operation for system safety. (*6) An On Demand Switch must be connected to the Master Water Heater which the Remote Controller is connected for Quick Connect Multi System. Air Vent and Air Out (*2) Pressure Relief Valve (*5) Valve (*3) Expansion Tank (*4) [With a dedicated return line] • (Only when conforming to California Code of Regulations Title 24 Part 6) - Change the Recirculation setting. (See page 59) - Install On-demand Switch and Thermo-sensor. (See page 50) NOTE If gurgling noise occurs or the error code 63 appears on the Remote Controller, it may be caused by air remaining in the system (e.g. Cold Water Line, Hot Water Line, Return Line or Water Heater). Purge air from the system completely, following instructions on page 60-64.

Expansion Tank (Install according to local code) Cold Water Supply Hot Water Return (Operating in crossover mode) Cold Water Supply (Normal usage) (*1) Manufacturer stocks the “Isolation Valve” (Service Valve Kit) for easy water line installation. The Isolation Valve (Service Valve Kit) is necessary for flushing the Heat Exchanger. Remote Controller (*1) (*3) Fixture Fixture Fixture (*2) Crossover Valve Hot Water Supply Line To hot water faucet Hot Water OUT Cold Water OUT To cold water faucet Crossover Valve Flex Hose (provided in kit) Flex Hose (existing riser) Flex Hose (existing riser) Flex Hose (provided in kit) Cold Water IN Hot Water IN (*2) Verify installation direction of the Crossover Valve. (*3) The cold water supply line must be branched to the hot water return line for Crossover mode. The Crossover Kit including in this branch pipe will be stocked in the Manufacturer. See the part number on page 5. Crossover Connect the connector marked "Crossover" for Crossover mode. Without connecting this connector, the error code 63 may be displayed on the remote controller. [With the Crossover Valve] • Connect the connector marked “Crossover”. Refer to page 51 for the location of the connector. • The minimum setting temperature is “Fahrenheit mode : 120°F / Celsius mode : 50°C for Crossover Mode. (CAN NOT set the hot water temperature lower than 120°F / 50°C.) • Compatible crossover valves are the manufacturer (Sensor Valve Kit: 1829) or Watts (Sensor Valve Kit: 596816) products only. Model number or specification subject to change at manufacturer’s discretion. Be sure to contact the manufacturer. NOTE • Crossover valve passes cold water, therefore Water Heater will operate and recirculate automatically even without direct hot water usage. • If gurgling noise occurs or the error code 63 appears on the Remote Controller, it may be caused by air remaining in the system (e.g. Cold Water Line, Hot Water Line, Return Line or Water Heater). Purge air from the system completely, following instructions on page 60-64. • For proper recirculation operation, only one crossover valve may be installed. Connecting the Water Supply

supply system, such as one having a backflow preventer on the cold water supply line, means shall be provided to control thermal expansion. Contact the water supplier or a local plumbing inspector on how to control this situation. • If installing the Water Heater on a roof: If the Water Heater is installed on a roof to supply water to the levels below, make sure that the water pressure supplied to the Water Heater does not drop below 29 psi. It may be necessary to install a pump system to ensure that the water pressure is maintained at this level or to decrease the flow rate by adjusting the water fixture. Check the pressure before putting the Water Heater into operation. Failure to supply the proper pressure to the Water Heater may result in noisy operation, shorter lifetime of the Water Heater, and may cause the Water Heater to shut down frequently. 8.2 Installation 8.2.1 Guidelines Potable water • Piping and components connected to the Water Heater shall be suitable for use with potable water. • Toxic chemicals, such as those used for boiler treatment, shall not be introduced into the potable water. • A Water Heater used to supply potable water may not be connected to any heating system or components previously used with a nonpotable water heating appliance. Maximum accept length for recirc. Pipe length of hot water supply line and hot water return line and fittings should be within following table. Pipe Diameter 3/4 in. 1/2 in. Total 500 ft (152 m) 200 ft (61 m) Connnecting water supply • Flush water through the pipe to clean out metal powder, sand and dirt before connecting it. • Use a union coupling or flexible pipe for connecting the pipes to reduce the force applied to the piping. NOTE • Do not use piping with a diameter smaller than the coupling. • Avoid using joints as much as possible to keep the piping simple. • Avoid piping in which an air holdup can occur. Cold water supply • Be sure to check the water pressure. - In order for the client to use the Water Heater comfortably, 15 to 150 psi* (103.4 to 1034 kPa) of pressure is needed from the water supply. * ‌Recommended 50 to 80 psi for maximum performance. - If the water pressure is low, the Water Heater cannot perform to its full capability, and may become a source of trouble for the client. - If the water pressure is low, local boiling will occur inside the Water Heater causing abnormal sounds and decreasing the durability of the Heat Exchanger. - If the water pressure is too high, use a Pressure Reducing Valve and a Water Hammer Arrester. • Recommend installing a pressure meter on the inlet. Pressure Relief Valve • A pressure relief valve must be installed near the hot water outlet that is rated in accordance with and complying with either The Standard for Relief Valves and Automatic Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22, or The ANSI/ ASME Boiler and Pressure Vessel Code, Section IV (Heating Boilers). • A pressure relief valve must be capable of an hourly Btu rated temperature steam discharge capacity of 199,900 Btu/h. Multiple valves may be used. The pressure relief capacity must not exceed 150 psi. • Do not install a shutoff valve between a relief valve and the Water Heater. The relief valve must be installed such that the discharge will be conducted to a suitable place for disposal when relief occurs. • No reducing coupling or other restriction may be installed in the discharge line. The discharge line must be installed to allow complete drainage of both the valve and the line. • If this Water Heater is installed with a separate storage vessel, the separate vessel must have its own temperature and pressure relief valve. • Temperature and pressure relief valve must also comply with The Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22 (in the U.S. only). • A temperature relief valve is not required, but if one is used, do not install the valve with the probe directly in the flow of water. This may cause unwarranted discharge of the valve. • When the system requires water for space heating at temperatures higher than required for other uses, a means such as a mixing valve shall be installed to temper the water for those uses in order to reduce scald hazard potential. Connecting the Water Supply

automatically unless the outside temperature without wind is below -30°F (-35°C). • If this model is installed in an area where the outside temperature can approach freezing conditions of -30°F (-35°C) or below, then additional freeze protection measures must be used. NOTE The room temperature must be greater than 32°F (0°C) to prevent freezing and the room inside must not have negative pressure. Completely insulate the water inlet and outlet fittings. Do not cover the water drain plug with insulation. The water in the pipe can be drained. Insulate the water supply valve completely. Perform the following insulation measures for prevention of freezing. • Take appropriate heat insulation measures (e.g. wrapping with heat insulation materials, using heat tape, electric heaters, solenoids, or pipe covers) according to the climate of the region to prevent the plumbing external to the Water Heater from freezing. The freeze prevention heaters will not prevent this plumbing from freezing. • Make sure that there are no water leaks from the cold and hot water supply lines and the hot water return line, then insulate the pipes completely. • Be sure to also completely insulate the water supply valve and the cold water, hot water and hot water return connections on the Water Heater. • For temporary freeze protection measures, refer to the Owner’s Guide. NOTE In order for the freeze prevention heaters to operate, the Water Heater must connect the electrical power at all times. 8.2.2 Freeze Prevention • Freezing is prevented within the Water Heater automatically unless the outside temperature without wind is below -4°F (-20°C). • If this model is installed in an area where the outside temperature can approach freezing conditions of -4°F (-20°C) or below, then additional freeze protection measures must be used. CAUTION Hot water supply • Try to make the piping as short as possible. The longer the piping, the greater the heat loss. • Use mixing valves with low water flow resistance. • Use shower heads with low pressure loss. • If the Maximum flow of water cannot be obtained with the supplied water pressure and/or the water supply pressure is below the recommended pressure, use a pump to increase the pressure and water flow. • It is recommended that the installation of a wye pattern strainer downstream on the hot water supply to prevent loose scale from accumulating and clogging fixtures. NOTE Do not use lead, PVC, iron or any piping which has been treated with chromates, boiler seal or other chemicals. • Mount a check valve (near the inlet) when required by local code. • Mount a shut off valve (near the inlet). NOTE Do not use PVC, iron, or any piping which has been treated with chromates, boiler seal or other chemicals. Connecting the Water Supply

8.3 Water Treatment Water Treatment System City Water Supply Pressure Relief Valve Hot Water to Fixtures Hot Water from Fixtures Shutoff Valve Drain Cold to Water Heater Optional Sediment Filter Water Treatment Device Shutoff Valve Water Heater If this Water Heater will be installed in a location where the hardness of the supply water is high, scale Build-up may cause damage to the Heat Exchanger. Perform suggested treatment and maintenance measures to be taken based on the water hardness level according to the below table. Type of Water Hardness Level Treatment Device*1 Flush Frequency*2 Soft 0-1 gpg (0-17 mg/L) None None Slightly Hard 1-3 gpg (17-51 mg/L) Moderately Hard 3-7 gpg (51-120 mg/L) Scale Inhibitor*3 or Water Softener Once a Year*4 Hard 7-10 gpg (120-171 mg/L) Very Hard 10-12 gpg (171-200 mg/L) Extremely Hard > 12 gpg (> 200 mg/L) Treatment Guidelines *1 When selecting a treatment device, you must consult with the device’s spec sheet and installation manual for guidelines and limitations. Not all water supplies are compatible. A water test may be required. *2 Install Service Valve Kit with Pressure Relief Valve to allow for flushing. *3 See the page 6 for more detail information about Scale Inhibitor. *4 Flushing is required if a water treatment device is not installed. NOTE Damage to the Water Heater as a result of the items below is not covered by the Pavilion Limited Warranty. • Water in excess of 12 gpg (200 mg/L) of hardness • Poor water quality (See the Water Quality List on page 12.) • The Remote Controller has displayed a “C1# (Service Reminder)” indicating Scale Build-up, but the Heat Exchanger has not been flushed. Water treatment device • The Water must be treated with a Scale Inhibitor* or a Water Softener. (* Scale Inhibitor: See the page 6 for more detail information.) • Water softeners may be regulated by the local water jurisdiction, consult with the manufacturer for code, sizing, and installation guidelines. The below diagram is for reference only. For more information about Scale Shield, contact Pavilion Customer Center at https://www.peerlessboilers.com/ or 1-855-443-8468. Connecting the Water Supply

• The Heat Exchanger regularly needs to be flushed to prevent damage from Scale Build-up. Refer to the “Procedure for flushing the Heat Exchanger” on page 69 or contact Pavilion Customer Center for more information. (https:// www.peerlessboilers.com/ or 1-855-443-8468) About the Service Reminder • This Water Heater is equipped with an automatic service reminder to announce for flushing the Heat Exchanger. • If the service reminder is selected to ON, the code “C1#*” will displayed on the Remote Controller after the set time period has been reached. When the code is displayed, the Heat Exchanger needs to be flushed to prevent damage from Scale Build-up. * It is recommended to flush the Heat Exchanger when the code “C1#” appears. # = 1, 2, 3, 4 ... 9 • The factory default of this service reminder is disable. If desired, the customer or installer needs to enable the service reminder (connect the red connector marked “SERVICE REMINDER”). [When the code “C1#” appears:] Flush the Heat Exchanger. Refer to the “Procedure for flushing the Heat Exchanger” on page 69. After completing the flushing, the code will be reset. To deactivate the code “C1#”, disconnect the red connector marked “SERVICE REMINDER”. The service reminder will be disabled. NOTE Need to be flushed the Heat Exchanger in this case. [Procedure when turning the service reminder ON] 1. Remove the front cover (4 screws). 2. Connect the red connector marked “SERVICE REMINDER” near the Circuit Board. 3. Reattach the front cover (4 screws). Circuit Board SERVICE REMINDER Connect SERVICE REMINDER The service reminder is enabled when connecting the connector. Connecting the Water Supply

Condensing Water Heater • In order to ensure proper operation of this Water Heater, need to install the condensate drain pipe to drain acidic condensate which produces during operation. • The pH level of the condensate is approximately 2-3. An external neutralizer must be installed on the condensate drain piping prior to disposal when required by local code or when the condensate could cause damage. NOTE Damage caused by improperly handled condensate is not covered by the Pavilion Limited Warranty. Floor drain The end of the condensate drain pipe must have an air gap. MAINTAIN CLEARANCE 1/2 in. PVC pipe DO NOT ADD ANY VALVES Slope the condensate drain piping toward the inside floor drain. [Condensate drain piping to floor drain] [Condensate drain piping with pump] The end of the condensate drain pipe must have an air gap. 3/8 in. ID tubing* * Install tubing according to pump manufacturer’s instructions. Condensate pump DO NOT ADD ANY VALVES 1/2 in. PVC pipe 1/2 in. PVC elbow Slope the condensate drain piping toward the inside condensate pump. [If an external neutralizer is installed] Periodic replacement of the neutralizing agent will be required. Refer to the instructions supplied with the neutralizer for suggested replacement intervals. Floor drain Sizing of the condensate drain piping In order to drain the condensate, a 1/2 in. threaded fitting is provided at the base of the Water Heater. NOTE Do not reduce the size of the fitting or the condensate drain piping to less than 1/2 in. Location of the condensate drain piping In climates where temperature routinely reaches below freezing, do not drain the condensate to the outdoors. If the condensate drain pipe freezes during cold weather, the pipe will not drain condensate and the Water Heater will stop operating. Long runs or applications where the nearest drain is above the Water Heater Require the use of a condensate pump. Size the pump to allow for a maximum condensate discharge of 2 GPH from the Water Heater. Material of the condensate drain piping Use plastic pipe, such as PVC, for the drain line. NOTE Do not use steel, black iron, or any other material which can corrode when placed into contact with acidic condensate. Condensate drain piping Make the condensate drain piping run as short as possible. Condensate drain pipe NOTE Do not make a trap. Connecting the Condensate Drain

• Make sure that there are no obstructions blocking the condensate drain line from discharging condensate. • Be sure to check that condensate is freely flowing from the condensate drain piping. Condensate will begin flowing out of the Water Heater within 15 minutes after operation has started. Freeze prevention Take measures to prevent the condensate drain lines from freezing (insulation, heat tape, electric heaters, etc.). Condensate drain pipe Drain connecting supply Heat insulation material Water heater Connecting the Condensate Drain

This appliance must be electrically grounded in accordance with local codes, or in the absence of local codes, with the National Electrical Code, ANSI/ NFPA 70. In Canada, the latest CSA C22.1 Electrical Code. Consult a qualified electrician for the electrical work. 10.1 Water Heater • Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. • Electrostatic discharge can affect electronic components. Take precautions to prevent electrostatic discharges from personnel or hand tools during the water heater installation and servicing to protect product’s electronic control. CAUTION Electrical Shock Hazard Do not connect the electrical power to the appliance until all electrical wiring has been completed. Failure to do so may result in death or serious injury from electrical shock. WARNING Breaker Installation Mount a device which shuts off the electrical path automatically (leakage breaker) to detect electrical leakage. Power Supply • The electrical supply required by the Water Heater is 120 VAC at 60 Hz. The power consumption may be up to 332 W or higher if using optional accessories. Use an appropriate circuit. • Tie the redundant power cord outside the Water Heater. Putting the redundant length of cord inside the Water Heater may cause electrical interference and faulty operation. NOTE • Do not let the power cord contact the gas piping. • Do not disconnect the electrical power when not in use. When the power is off, the freeze prevention in the Water Heater will not activate, resulting in possible freezing damage. Ground To prevent electrical shock, provide a ground with resistance less than 100 Ω. An electrician should do this work. NOTE • Do not connect the ground to the city water or gas piping. • Do not tie the ground to a telephone line. 10.2 Remote Controller • Install the remote controller according to the instructions on page 52-57. • Only one the Remote Controller can be connected to the Water Heater. A malfunction may occur if two or more Remote Controllers are connected. • Install according to the National Electrical Code and all applicable local codes. • For extensions, a 26 ft (7.9 m) cord can be purchased separately. • The Remote Controller Cord can be extened up to 300 ft (91 m) by splicing the cord and using 18 AWG wire to extend the cord to the appropriate length. • Use a Y-shaped terminal with a resin sleeve. Without the sleeve, the copper wire may corrode and cause problems. NOTE • Do not connect the electrical power to the Water Heater until the Remote Controller installation is complete. • Be sure to hand tighten when screwing to the terminal block. Power tools may cause damage to the terminal block. Connecting the Remote Controller Cord 1. Check to make sure that the Remote Controller Cord has plenty of slack in order to reach the external connection terminal block. 2. Make sure the electrical power is disconnected from the Water Heater. Connecting Electricity

1. Leave enough slack so that the on-demand switch wires will stay connected if the Water Heater is removed from the wall. 2. Check the electrical power is disconnected from the Water Heater. 3. Remove the front cover (4 screws). 4. Connect the on-demand switch wires to On- demand SW terminal in the Water Heater. 2.7 mA @ 15 VDC will be applied to the on- demand switch. 5. When installing wireless on-demand switch or motion sensor, use a relay and connect to make contact (Normally Open Contact). 6. Reattach the front cover (4 screws). 10.3.1 On-demand Switch • Install the on-demand switch if necessary or when conforming to California Code of Regulations Title 24 Part 6. • This Water Heater is compatible with on-demand switch, wireless switch and motion sensor. • Prepare a relay when installing wireless on- demand switch or motion sensor. Do not apply any voltage to the On-demand SW terminal. This terminal is only for No-voltage contact. Contact Rating: more than 2.7 mA @ 15 VDC. • (For Quick Connect Multi-System) Connect the on-demand switch to the Water Heater connected with Remote Controller. 1. Leave enough slack so that the thermostat wires will stay connected if the Water Heater is removed from the wall. 2. Check the electrical power is disconnected from the Water Heater. 3. Remove the front cover (4 screws). 10.3.2 Thermo-sensor (Thermostat) • Install the thermostat and adjust the setting in accordance with Title 24. • (For Quick Connect Multi-System) Connect the thermostat both of the Water Heaters. 120 VAC 2 4 0 1 Connect to on-demand switch wires in Water Heater Relay (e.g. Omron G7L2ABUBJCBAC120) On-demand SW Receiver of wireless on-demand switch or motion sensor output Use a relay when connecting wireless switch or motion sensor 1. Refer to the step 1 - 3 of “Connecting the on- demand switch”. 2. Choose a suitable installation location for the relay where it will be protected from moisture. 3. Connect the on-demand switch wires from the heater to the signal output on the relay. 4. Cut one of the electrical supply leads and connect to the signal input on the relay. 5. Secure all connections and reattach the front cover. On-demand SW Wire Tag Crimping Terminal To the on-demand switch (Use a relay for wireless on-demand switch or motion sensor) Wiring Throughway Circuit Board 3. Open the external remote terminal block. 4. Pass the Remote Controller Cord through the wiring throughway. Connect the Y-shaped terminals at the end of the Remote Controller Cord to the terminal block. 5. Reattach the terminal block cover. NOTE Tie the redundant cord outside the Water Heater. Do not put the extra length inside the Water Heater. 1) Pinch 2) Pull downward Wiring Throughway Remote Controller Cord Connecting Electricity

NOTE For Quick Connect Multi-System installation only use the Quick Connect Cord (sold separately). NOTE Do not connect the Remote Controller to both Water Heaters. If the Remote Controller is connected to both Water Heaters, disconnect unnecessary Remote Controller prior to installing the Quick Connect Cord. • The Remote Controller can be connected to either Water Heater A or B only. 1.Red 2.Black 3.White 4.Green 5.Blue 6.Blue 1.Red 2.Black 3.White 4.Green 5.Blue 6.Blue 1.Red 2.Black 3.White 4.Green 5.Blue 6.Blue 1.White 2.Green 3.Red 4.Black 5.Blue 6.Blue A B Quick Connect Cord “Quick Connect Cord-2” tag • The wire coloring on the Quick Connect Cord will not be the same as the wire coloring of the connection plug inside the Water Heater. Connecting the Quick Connect Cord to the two Water Heaters 1. Check the electrical power is disconnected from the Water Heater. 2. Remove the front cover (4 screws). 3. Pass the Quick Connect Cord through the wiring throughway and into the Water Heater. 4. Plug the connector on the Quick Connect Cord to the connector inside the Water Heater. 5. Connect the ground wire (gray color wire) to the screw at the base of the Water Heater. 6. Secure the Quick Connect Cord with a clamp. 7. Reattach the front cover (4 screws). NOTE If the ground wire is not attached, electrical noise may cause problems. 4. Cut the Thermo-sensor wire (Looped White) in the Water Heater. Cut Thermo-sensor Wire Tag 5. Connect to break contact (Normally closed Contact) on the thermostat. 6. Reattach the front cover (4 screws). Thermo-sensor Wire Tag Crimping Terminal To the thermostat Wiring Throughway Circuit Board 10.3.3 Crossover Valve • Connect the connector marked “Crossover” when installing the Crossover Valve. • (For Quick Connect Multi-System) Connect the connector both of the Water Heaters. Circuit Board Connect Crossover Crossover Wiring Throughway “Quick Connect Cord-2” tag Clamp Connector Quick Connect Cord Ground Wire Circuit Board Connecting Electricity

• (RC-7651M-A NB) The Remote Controller is water resistant but not water proof. Keep it as dry as possible. (RC-9018M NB) The Remote Controller is not water resistant. Keep it dry. • Unplug the electrical power from the Water Heater and do not connect the electrical power to the Water Heater until the Remote Controller installation is complete. • Do not disassemble the Remote Controller. • (RC-9018M NB) Keep the Remote Controller in a safe location prior to mounting it on the wall to prevent metal shavings from entering the Remote Controller. This Remote Controller has a built-in speaker which can be damaged by metal shavings resulting in sound cracking. Screw tightening • Be sure to fasten the mounting screws tightly by hand screwdriver so that the Remote Controller will be secure. • Never fasten or loosen unnecessary screws for the Remote Controller installation. NOTE Do not use electric drivers, impact drivers and so forth. Tightening with excessive force may cause the Mounting Bracket and the Remote Controller to be damaged and lead to failures. Notes on the Installation Location • The Remote Controller should be installed in an easily accessible location. • Install the Remote Controller on an even wall surface. Installing it on an uneven wall surface may cause the Mounting Bracket and the Remote Controller to be damaged and lead to failures. • Be sure to check the positions of wall studs or other obstructions when determining the installation location for the Remote Controller. NOTE • Avoid installing in a place where water or steam can come into contact with the controller. • Avoid locations where special chemical agents (e.g. benzene, fatty and oily detergents) are used. • Avoid outdoor installation, or installation in an indoor location where it will be exposed to direct sunlight. Installation of Remote Controller Cord • Secure the Remote Controller Cord with appropriate anchors, ties, etc. • Wire the Remote Controller Cord in an area where it will not be directly affected by heat. • To embed the Remote Controller Cord in concrete, brick, etc., enclose it in conduit in order to prevent the Remote Controller Cord from becoming damaged. • (RC-9018M NB) When penetrating a wall containing metal lath, prevent the lath from coming into contact with any metallic conduit used in order to prevent electrical interference. 11.1 General Requirements 11.2 RC-7651M-A NB Included Accessories Remote Controller (× 1) Dry Wall Anchor (× 2) Anchoring Screw (× 2) Mounting Packing (× 1) Installation of the Remote Controller

the Remote Controller. 2. Connect the Remote Controller wires to the cord supplied with the Water Heater. 3. Remove the cover of the Remote Controller, mark the location of the screw holes, and drill holes for the Dry Wall Anchors. 4. Insert the Dry Wall Anchors, screw the Remote Controller to the wall and reattach the cover. Remote controller wires Rear Side of the Remote Controller Remote Controller Cord Mounting Packing (take off the paper) Dry Wall Anchor Anchoring Screw Post-installation Checks 1. Check if the Remote Controller is installed securely. 2. Check the Remote Controller operation. (See Owner's Guide) • Press the button approximately 5 seconds after connecting the electrical power to the Water Heater. • Check that the display appears on the Remote Controller. Adjusting the Temperature / Water Quantity Display Stopping the Recirculation Operation 1. Turn the Water Heater off by pressing the button on the Remote Controller. 2. Press the button and hold it in for 2 seconds or more. 3. Press the button several times until the item number “4” is displayed. 4. Select “[on] ↔ [oF]” using the / buttons. • on (recirculation on): default setting • oF (recirculation off) 5. To confirm the setting, turn the Water Heater on by pressing the button on the Remote Controller. 3. Press the button and hold it in for 2 seconds or more. 4. Press the button several times until the item number “12” is displayed. 5. Select “[°F/gal] ↔ [°C/L]” using the / buttons. • °F/gal (Fahrenheit/Gallon): default setting • °C/L (Celsius/Liter) 6. To confirm the setting, turn the Water Heater on by pressing the button on the Remote Controller. 1. Turn the Water Heater off by pressing the button on the Remote Controller. 2. Disconnect, then reconnect the electrical power to the Water Heater. NOTE The setting must be done within the first 10 minutes of connecting the electrical power to the Water Heater. Installation of the Remote Controller

Mounting Bracket (× 1) Flat Head Tapping Screw (× 2) Dry Wall Anchor (× 2) Flat Head Machine Screw (× 2) (For junction box installation) Round Head Machine Screw (× 2) 11.3 RC-9018M NB Limiting the Maximum Output Temperature The maximum output temperature can be limited to prevent discharging hot water at too high of a temperature. Default setting of maximum output temperature is 120°F (50°C). 1. Turn the Water Heater off by pressing the button on the Remote Controller. 2. Press and hold the button until a sound is heard (approximately 2 seconds). [120°F/50°C] appears on the display. 3. Set the upper limit of the hot water temperature using the / buttons. • For Fahrenheit (°F): 125- 140°F (In 5°F intervals) • For Celsius (°C): 55°C, 60°C 4. Set the button to ON when continuing to use the unit as is. Otherwise, let the unit sit for approximately 30 seconds. • When changing the temperature, make sure to confirm with the customer that the temperature of the Hot Water will be very high and that there is a risk of scalding. • Hot water temperatures over 125°F (52°C) can cause severe burns instantly or death from scalding. DANGER Installation of the Remote Controller

Mounting Bracket (included part) Junction box Flat Head Machine Screw (included part) Confirm the orientation of the Mounting Bracket is correct. Top Bottom [When attaching to a junction box] Use the Flat Head Machine Screws to attach the Mounting Bracket to the junction box. (The Dry Wall Anchor and Flat Head Tapping Screws are not used.) Mounting Bracket (included part) Flat Head Tapping Screw (included part) Confirm the orientation of the Mounting Bracket is correct. Top Bottom [When attaching to a wood surface] Use the Flat Head Tapping Screws to attach the Mounting Bracket. (The Dry Wall Anchor and Flat Head Machine Screws are not used.) NOTE Never use electric drivers, impact drivers, etc. Tightening with excessive force may result in deformation of the Mounting Bracket and/or failures. Mounting Bracket (included part) Dry Wall Anchor (included part) Flat Head Tapping Screw (included part) Confirm the orientation of the Mounting Bracket is correct. Top Bottom [When attaching to a concrete wall surface] Drill a φ1/4 in. (φ6 mm) hole, approximately 1 in. (25 mm) in depth, and hammer in the Dry Wall Anchor. Attach the Mounting Bracket using the Flat Head Tapping Screws. (Flat Head Machine Screws are not used.) NOTE Too large hole for Dry Wall Anchor may result in failure to properly secure the Remote Controller. Installation of the Remote Controller

them around the notches. Pass the remote controller wires through the notch. Winding around the notches [For exposed wiring] [For wiring inside the wall] Mounting Bracket Remote controller wires 6. Attach the Remote Controller to the Mounting Bracket. Main remote controller Mounting Bracket ①Insert the bottom of the Main remote controller into the groove at the bottom of the Mounting Bracket. Groove • Do not install on the Mounting Bracket by force, the hooks may break. • Check for proper alignment in the groove or for loose wires obstructing the Remote Controller. ②Push in the 2 hooks on top of the Main remote controller completely. Hooks 7. Secure the Main remote controller using the Round Head Machine Screws. Round Head Machine Screw (included part) 8. Reattach the cover previously removed on step 2. Push the 4 corners of the cover until there is a click. Click Click Click Click NOTE Incomplete installation may result in failures such as switch operation failure. 4. Check the terminal is covered with Section A ( ) of the insulating cover (clear, see the figure above). NOTE If the Y-shaped terminal is not covered, the exposed section may come into contact with the Mounting Bracket resulting in improper operation or failure. 3. Connect the Remote Controller wires to the cord supplied with the Water Heater. Do not remove the remote controller wires from the terminal block, connect these wires to the Remote Controller Cord. For routing the remote controller wires, carefully cut the wire routing tab of the thinned portion of the cover before mounting it to the wall. THIS SIDE UP Section A Insulating cover (clear) Do not remove. Remote Controller Cord Remote controller wires Wires routing tab Cover 2. Remove the cover from the Remote Controller. (The cover is set in the Remote Controller.) To remove the cover, press the clear tabs on the bottom of the Remote Controller while pulling the cover forward. Cover Main remote controller Installation of the Remote Controller

securely. 2. Check the Remote Controller operation. (See Owner's Guide) • Press the “Power” button approximately 5 seconds after connecting the electrical power to the Water Heater. • Check that the display appears on the Remote Controller. Adjusting the Temperature / Water Quantity Display 3. Press the “MENU” button inside the cover, select “Initial settings” using the / buttons. 4. Press the “ENTER” button, the “Initial settings” screen appears on the display. 5. Select “[°F/gal] ↔ [°C/L]” using the / buttons. • °F/gal (Fahrenheit/Gallon): default setting • °C/L (Celsius/Liter) 6. Press the “ENTER” button and select either [°F/ gal] or [°C/L] using the / buttons. 7. Press the “ENTER” button, “Set complete Please wait...” appears on the display for 5 seconds and then the “Initial settings” screen appears on the display. 8. To confirm the setting, turn the Water Heater on by pressing the “Power” button on the Remote Controller. 1. Turn the Water Heater off by pressing the “Power” button on the Remote Controller. 2. Disconnect, then reconnect the electrical power to the Water Heater. NOTE The setting must be done within the first 10 minutes of connecting the electrical power to the Water Heater. Limiting the Maximum Output Temperature The maximum output temperature can be limited to prevent discharging hot water at too high of a temperature. Default setting of maximum output temperature is 120°F (50°C). 1. Turn the Water Heater off by pressing the “Power” button on the Remote Controller. 2. Press the “MENU” button inside the cover, select “Misc settings” using the / buttons. 3. Press the “ENTER” button, the “Misc settings” screen appears on the display. 4. Select “Max set Temp” using the / buttons. 5. Press the “ENTER” button, [120°F/50°C] appears on the display. 6. Set the upper limit of the hot water temperature using the / buttons. • For Fahrenheit (°F): 125- 140°F (In 5°F intervals) • For Celsius (°C): 55°C, 60°C 7. Press the “ENTER” button, “Set complete” appears on the display and then and then returns to the “Misc settings” screen. 8. To put the Water Heater back into operation, press the “Power” button. To keep the Water Heater off, either press the “MENU” button or let the Water Heater sit for 20 seconds to return to the original display. • When changing the temperature, make sure to confirm with the customer that the temperature of the Hot Water will be very high and that there is a risk of scalding. • Hot water heater temperatures over 125°F (52°C) can cause severe burns instantly or death from scalding. DANGER [To remove the cover after installation of the Remote Controller] If it does not come off, insert a flat head driver into the notch at the bottom of the cover and slightly twist it to remove. NOTE Due caution is required not to scratch the Remote Controller, the cover or the wall in doing so. Put fingers into this gap. Pull the entire cover forward while pressing the sections indicated (where the fingers are). Installation of the Remote Controller

How to change the DIP switches 1. Disconnect the electrical power to the Water Heater before changing the DIP switches.* 2. Open the front cover of the Water Heater (4 screws). 3. Adjust the DIP switches. 4. Close the front cover of the Water Heater (4 screws). 5. Reconnect the electrical power to the Water Heater. * Failure to perform this step will result a “73” code displayed on the Remote Controller and a cease in operation. If this occurs, disconnect, then reconnect the electrical power to the Water Heater to reset the system. • When using 2 in. flexible PP material Change DIP switch #7 by following the table below. Circuit Board 1 2 3 4 5 6 7 8 OFF ON The location of DIP switch bank The DIP switch bank is placed on the circuit board. DIP Switch Listing [For outdoor installation] Turn ON DIP switch #2. [For using SV Conversion Kit] Turn ON DIP switch #3. [For installing at an altitude of 2,000 ft (610 m) or higher] Change DIP switch #5 and #6 by following the table below. [For adjusting to accommodate longer vent runs] • When using PVC/CPVC/PP material Change DIP switch #7 and #8 by following the table below. Refer to page 20 for more details on ① to ④ . High elevation adjustment DIP switches #5 #6 0-2,000 ft (0-610 m) OFF OFF 2,001-4,000 ft (611-1,219 m) ON OFF 4,001-7,000 ft (1,220-2,134 m) OFF ON 7,001-10,000 ft (2,135-3,048 m) ON ON Vent length condition DIP switches #7 #8 ①Less than 33 ft using 2 in. (50 mm) pipe OFF OFF ②33 ft or more using 2 in. (50 mm) pipe ON OFF ③Less than 75 ft using 3 in. (75 mm) pipe OFF ON ④75 ft or more using 3 in. (75 mm) pipe ON ON Vent length DIP switches #7 #8 Short length 5 ft (1.5 m) - 15 ft (4.5 m) OFF OFF Long length 15 ft (4.5 m) - 35 ft (10.5 m) ON OFF • When using flexible pipe for chimney Change DIP switch #7 by following the table below. (DuraVent® - Flex Through Chimney w/ Air Intake (Only 3 in.)) * The maximum vent length includes elbows. Vent length condition DIP switch #7 Maximum equivalent vent length* V (Vertical) + H (Horizontal) Equivalent length Short length OFF < 50 ft (15 m) Flexible pipe: 1 ft (0.3 m) Rigid pipe: 1 ft (0.3 m) 90° elbow: 5 ft (1.5 m) 45° elbow: 3 ft (0.9 m) Long length ON 50 ft (15 m)–75 ft (22.5 m) (Centrotherm® - Flex Through Chimney w/ Air Intake (Only 3 in.)) * The maximum vent length includes elbows. Vent length condition DIP switch #7 Maximum equivalent vent length* Equivalent length Short length OFF Exhaust vent V (Vertical) + H (Horizontal): < 50 ft (15 m) Air Intake: < 50 ft (15 m) Flexible pipe: 1 ft (0.3 m) Rigid pipe: 1 ft (0.3 m) 90° elbow: 5 ft (1.5 m) 45° elbow: 3 ft (0.9 m) Long length ON Exhaust vent V (Vertical) + H (Horizontal): 50 ft (15 m)–75 ft (22.5 m) Air Intake: 50 ft (15 m)–75 ft (22.5 m) Setting the DIP Switches

Auto recirculation (Learning mode) start automatically when the Remote Controller is turned on. When changing other recirculation mode (e.g. conforming to Title 24), change the setting as follows. For RC-7651M-A 1. Turn the Water Heater off by pressing the button on the Remote Controller. 2. Disconnect, then reconnect the electrical power to the Water Heater. For RC-9018M 1. Turn the Water Heater off by pressing the “Power” button on the Remote Controller. 2. Disconnect, then reconnect the electrical power to the Water Heater. NOTE The setting must be done within the first 10 minutes of connecting the electrical power to the Water Heater. NOTE The setting must be done within the first 10 minutes of connecting the electrical power to the Water Heater. NOTE • The setting changes can be cancelled by pressing the button before confirming the settings, or if the Water Heater is left alone for 10 minutes without confirming the settings. • If the default setting needs to be changed again, disconnect the electrical power to the Water Heater, reconnect it and repeat this procedure. 3. Press the button and hold it until the Remote Controller displays item number “99”. • This will put the Water Heater into Maintenance Writer mode. • If pressing the button does not put the Water Heater into Maintenance Writer mode, make sure the remote controller display is blank, unplug the Water Heater for 60 seconds, and try again. 4. Change the Maintenance Writer item number display using the / buttons, and then press the button for 0.5 seconds. • The item number setting change from “OFF” to “ON”. • If the PRIORITY indicator turns on when an item number is displayed, this indicates an “ON” setting for that item number, and if the PRIORITY indicator is off, the item number is “OFF”. 5. After setting these item number, press and hold both the / buttons for five seconds to confirm the new settings. • The Remote Controller will emit a beeping tone and the display will go blank when the settings are confirmed. • If this is not done, the Water Heater will not put the setting changes into effect. 3. Press the / buttons and hold them until the Remote Controller displays item number “99”. • This will put the Water Heater into Maintenance Writer mode. • If pressing the / buttons does not put the unit into Maintenance Writer mode, make sure the remote controller display is blank, unplug the Water Heater for 60 seconds, and try again. 4. Change the item number on the column of the item using the / buttons, and then press the “ENTER” button. • “Item number” stops blinking and “Date state (OFF or ON)” will start blink. 5. Change from “OFF” to “ON” using the / buttons, and then press the “ENTER” button. • “Data state (ON)” stops blinking and “Item number” will start blink. 6. After setting these item number, press and hold both the / buttons until the Remote Controller will emit a beeping tone. • If this is not done, the Water Heater will not put the setting changes into effect. 7. Disconnect the electrical power to the Water Heater. Wait 10 seconds or more, and reconnect the electrical power. Item # 3B 24 23 22 Auto Recirc (Default) OFF OFF OFF OFF On-Demand (Title 24) Mode ON OFF ON ON Manual Timer Recirc* OFF ON OFF ON Always Recirc ON OFF OFF ON OFF Always Recirc OFF OFF OFF ON ON Item # 3B 24 23 22 Auto Recirc (Default) OFF OFF OFF OFF On-Demand (Title 24) Mode ON OFF ON ON Always Recirc ON OFF OFF ON OFF Always Recirc OFF OFF OFF ON ON * If the water heater will not be used for a long period of time at the “Manual Timer Recirculation”, turn off the recirculation program for energy saving. The procedure to turn off is shown in the User’s Manual (RC-9018M) on page 17. Setting for Recirculation

Trial Operation 2. Open the gas supply valve. 3. Turn on the button or the “Power” button on the Remote Controller (the Power indicator will turn on). • Recirculation pump turns on automatically and starts Auto recirculation mode. (If using On-Demand (Title 24) mode, press the on-demand switch to start pump operation.) NOTE • White smoke may be noticed from the exhaust vent during cold weather. This is not a malfunction of the Water Heater. • If the Water Heater does not operate normally, refer to “Troubleshooting” in the Owner’s Guide. There is a scald potential if the setting temperature is too high. DANGER Should overheating occur, or the gas supply fail to shut off, turn off the manual control valve to the appliance. [If installed a single water heater] 4. After two minutes since turning on the button or the “Power” button, open a hot water fixture and confirm that the Flame symbol comes on, and that hot water is being produced. NOTE If an error code “11” appears on the Remote Controller, air may be trapped in the gas line. 1) Close a hot water fixture. 2) Turn the Water Heater off and then back on. 3) Reopen a hot water fixture. 4) If necessary, repeat until the air is completely purged from the gas line. 5. Check that the hot water temperature changes by pressing the / buttons. Proceed to Steps 6 and 7 Pump Drain Plug Return Drain Plugs The installer should test operate the Water Heater, explain to the customer how to use the Water Heater, and give the owner this manual before leaving the installation. Before filling the Water Heater, pipe the recirculation system in accordance with the plumbing diagram on page 41 and 42. Never turn on and fire up the Water Heater unless the system is completely filled with water. 1. Purge the air in the Water Heater and all the water line in accordance with following procedure. 1) Close the gas supply valve. 2) (Only with dedicated return line) Close the “Ball Valve for Return Line”. See the detail plumbing information for location of “Ball Valve for Return Line” on page 42. 3) Open all fixtures on hot water supply, and make sure that supplied water is discharging from each fixture without air. Then close all the fixtures. 4) (Only with dedicated return line) Open the “Hose Bibb” to assist with purging all air from the whole plumbing system. See the detail plumbing information for location of “Hose Bibb” on page 42. 5) (Only with dedicated return line) Open the “Ball Valve for Return Line”. 6) Open the three drain plugs to purge air from the return line and recirculation pump (internal pump). Make sure that supplied water is flushing out through the three drain plugs without air. Then close the three drain plugs. NOTE Drain water into a bucket to prevent water damage. NOTE If gurgling noise occurs or the error code 63 appears on the Remote Controller, it may be caused by air remaining in the system (e.g. Cold Water Line, Hot Water Line, Return Line or Water Heater). Purge air from the system completely according to the Step 1-3. Without purging air, the Water Heater can not operate properly. NOTE [If installed with a Quick Connect Multi-System] 4. Two minutes after turning on the button or the “Power” button, slowly open a hot water fixture and check that a Water Heater ignites independently. If an error code “11” or “F11” appears on the Remote Controller, air may be trapped in the gas line. 1) Close a hot water fixture. 2) Turn the Water Heater off and then Trial Operation

Heaters, press and hold the Minimum burner set button on the circuit board. After two minutes since changing ignition priority, repeat step 4. Press and hold the Minimum burner set button on Water Heater B Water Heater A Ignites Water Heater B Doesn’t Ignite Water Heater A Doesn’t Ignite Water Heater B Ignites If error code “11”, “12”, “63” or “90” appears, make sure the following contents. [“11” : Ignition failure, “12” : Flame loss] • Check that the gas supply line is appropriately sized. • Check that the gas supply pressure is within the ranges required in this manual. • Check that the gas supply matches the type indicated on the Water Heater’s rating plate. • Air may be left in the gas piping. Cycle the power ON/OFF. • Check that the settings of all DIP switches are appropriate. [“63” : Recirculation abnormality] (With the Crossover Valve : Crossover Mode) • Check the installation direction of the Crossover Valve. • Check that the internal filter of Crossover Valve is not clogged. 5) Open the hot water valve, the water supply valve, and the hot water return valve. Check that water does not leak from the water drain valves. 6) Purge the air again referring to step 1-3 on page 60. NOTE Approximately 0.85 gallon (3.2 L) of water will drain out. 2) With a bucket ready, remove the water drain valves. 3) Clean each water filter with a brush under running water. 4) Reattach the water drain valves (with water filter). NOTE Do not lose the O-Ring. O-Ring Water drain valve with water filter Hot water return valve Filter in the hot water return Filter in the cold water inlet Hot water valve Water supply valve back on. 3) Reopen a hot water fixture. 4) If necessary, repeat until the air is completely purged from the gas line. NOTE • If gurgling noise occurs or the error code 63 appears on the Remote Controller, it may be caused by air remaining in the system (e.g. Cold Water Line, Hot Water Line, Return Line or Water Heater). Purge air from the system completely according to the Step 1-3 on page 60. Without purging air, the Water Heater can not operate properly. • If step 4 and step 5 cannot be done, the Quick Connect Cord may not be properly connected. Check that the cord is properly connected. Proceed to Steps 6 and 7 [Procedure to follow after step 5 for both installation of a single Water Heater and installation with a Quick Connect Multi-System] 6. • Make sure that there are no obstructions blocking the condensate drain line from discharging condensate. • Be sure to check that condensate is freely flowing from the condensate drain piping. Condensate will begin flowing out of the Water Heater within 15 minutes after operation has started. 7. After the trial operation, clean the filters in the cold water inlet and the hot water return according to the procedure as follows. 1) Close the hot water valve, the water supply valve, and the hot water return valve. Trial Operation

• Recirculation operates continuously for the first 24 hours after turn on the button. When stopping the recirculation, turn off the button, or change the setting referring to “Stopping the Recirculation Operation” on page 53. • Explain the “Important Safety Information”, “Operation Procedures” and “Follow-up Service” according to the Owner's Guide supplied with the Water Heater. • If the Water Heater will not be used immediately, close off all gas and water shut off valves, drain all of the water out of the Water Heater and the plumbing system to prevent the Water Heater and system from freezing, and bleed the gas out of the gas line. Refer to the procedure for preventing damage from freezing in the Owner’s Guide. Freezing is not covered by the Pavilion Limited Warranty. NOTICE Shutdown Instructions 1. Stop any water demand. 2. Turn off the electrical power. 3. Turn the gas control manual valve clockwise to the off position. This Water Heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner. A fire or explosion may result if these instructions are not followed, which may cause lose of life, personal injury or property damage. WARNING Lighting Instructions • Check that the return line (branch pipe) is connected (See page 41). • Check that the “Crossover Connector (Red Connector)” is connected (See page 41 and 51). • Purge all air from all water lines (plumbing) and Water Heater completely (See page 60). (With a dedicated return line : Dedicated Recirculation Mode) • Check that the return line is connected (See page 40). • Purge all air from all water lines (plumbing) and Water Heater completely (See page 60). [“90” : Combustion abnormality] • Check that the air supply / exhaust vent for blockage. • Check that the gas supply pressure is within the ranges required in this manual. • Check that the condensate piping is not frozen or clogged. • Check that the condensate piping is in a downward slope. • Check that the settings of all DIP switches are appropriate. Do not try to light the burner by hand. 1. Read the safety information in the installation manual or on the front of the Water Heater. 2. Turn off all electrical power to the Water Heater. 3. Do not attempt to light the burner by hand. 4. Turn the gas control manual valve (external to the Water Heater) clockwise to the off position. 5. Wait five minutes to clear out any gas. If the smell of gas remains, stop, and follow the instructions on page 3 of Owner's Guide. 6. Turn the gas control manual valve counterclockwise to the on position. 7. Turn on the electrical power to the Water Heater. 8. The Water Heater will now operate whenever hot water is called for. If the Water Heater will not operate, follow the shutdown instructions and call a service technician. Trial Operation

Choosing an Installation Location (See page 11 - 13) Yes No Make sure that the Water Heater is not installed in the following places. • Places where gasoline, benzene and adhesives are handled • Places in which corrosive gases (ammonia, chlorine, sulfur, ethylene compounds, acids) are present in the air • Places dust or debris will accumulate Installation Clearances (See page 13 - 14) Yes No Make sure that the Water Heater meets the required clearances. Installation of the Water Heater (See page 15 - 16) Yes No Make sure that the condensate container is filled with water. Venting the Water Heater (See page 17 - 36) Yes No Make sure that required combustion air is supplied to the Water Heater. Make sure using vent materials approved for use with category IV appliances. Make sure that there is no leakage or loose connection in the venting system. Make sure that the vent length is within the requirement. Make sure that bird screen(s) is installed on the vent termination. Make sure that the termination meets the clearance requirements. When using a horizontal section, make sure that the horizontal vent slope is 1/4 in. upwards for every 12 in. (300 mm) toward the termination. Make sure that the intake pipe and exhaust pipe are properly installed. Make sure that the vent system comforms with local codes, state codes, or national codes as ANSI/NFPA and CSA. Connecting the Gas Supply (See page 37 - 40) Yes No Make sure that the gas type is compatible with the type indicated on the Water Heater’s rating plate. Clean out any debris from the gas piping before connecting the Water Heater. Make sure that the gas piping size is appropriate. Make sure that the inlet gas pressure is within the specified range. Make sure that there are no leaks from the Water Heater and its gas connection. Connecting the Water Supply (See page 41 - 46) Yes No Clean out metal powder, sand and dirt from the water piping before connecting the Water Heater. Make sure to check and test the water quality to see if water treatment is necessary. Make sure that the water supply pressure is 15 to 150 psi (103.4 to 1034 kPa). Make sure that there is no water leakage from the cold water supply pipe and the hot water supply pipe. Make sure that the pressure relief valve is installed. After installing the Water Heater, review the following checklist. You should be able to answer “Yes” to all of the items in the checklist. If you answer NO to any item, installation is not complete. Review the appropriate sections to complete the installation. If you have additional questions or need assistance with installation, contact Pavilion Customer Center at 1-855- 443-8468 Checklist After Installation

the Water Heater. Make sure that appropriate heat insulation measures are taken according to regional climate. (e.g. wrapping with heat insulation materials, using electric heaters) (Only for crossover mode) Make sure the crossover valve is installed at the furthest fixture from the Water Heater on the hot water line. Connecting the Condensate Drain (See page 47 - 48) Yes No Make sure that the condensate drain piping is connected. Make sure that corrosion resistant material is used for the condensate drain piping. Make sure that the size of the condensate drain piping is 1/2 in or larger. Make sure that the condensate drain piping slopes towards the inside floor drain or condensate pump. Make sure that the end of the condensate drain pipe is open to the atmosphere. Make sure that the condensate has been treated before disposal as necessary. (when required by local code or when the condensate could cause damage) Make sure that measures are taken to prevent the condensate drain lines from freezing. (e.g. insulation material, heat tape or electric heater) Connecting Electricity (See page 49 - 51) Yes No Make sure that the electrical supply is 120VAC at 60 Hz. Make sure the grounding resistance is less than 100 Ω. Make sure the Remote Controller Cord is correctly installed. (Only for crossover mode) Make sure the connector marked “Crossover” is connected. Installation of the Remote Controller (See page 52 - 57) Yes No Make sure that the location of the Remote Controller is appropriate. Check the Remote Controller operation accordance with the Owner’s Guide. Make sure that the display appears on the Remote Controller. Setting the DIP Switches (See page 58) Yes No Make sure that all DIP switches are set correctly. Setting for Recirculation (See page 59) Yes No (When conforming to Title 24) Make sure that recirculation settings are set appropriately. Trial Operation (See page 60 - 62) Yes No Open a hot water fixture, make sure the BURNER ON indicator or the Flame indicator is displayed on the Remote Controller and hot water is present at the fixture. Clean the filter in the cold water inlet after the trial operation. If the Water Heater will not be used immediately, do the following. • Close all gas and water shutoff valves. • Drain all the water in the Water Heater and the plumbing system. • Disconnect the electrical power to the Water Heater. Make sure there is no error code indication “63” on the Remote Controller after trial operation. Make sure there is no gurgling sound occurs when the pump operating. Explain the “Important Safety Information”, “Operation Procedures” and “Follow-up Service” according to the Owner's Guide to the customer. Quick Connect Multi-System Installation (See page 66 - 67) Yes No Make sure that only one Remote Controller is installed. Checklist After Installation

Gas Supply Backflow Preventer (optional) Cold Water Supply Hot Water Hot Water Return Line Fixtures Air Handler Flow Switch Set the flow switch to deactivate the Air Handler when the domestic hot water flow reaches 3 GPM (11.3 L/min). Adjust as necessary to prevent cycle. Service Valve Kit with Pressure Relief Valve It is recommended the use of Service Valve Kit with Pressure Relief Valve with the installation. This kit includes an integrated shut-off and service valve with unions and a pressure relief valve. Mixing Valve If the system requires water for space heating at temperatures higher than required for other uses, a means such as a mixing valve shall be installed to temper the water for those uses in order to reduce scald hazard potential. Drain Valve Valve Air Vent and Air Out Check Valve Check Valve required if it is not included with the pump. Optional Expansion Tank Expansion tank required if a backflow preventer is installed. Air Vent Air Out Pump Size the pump to provide a maximum of 3 GPM (11.3 L/min) with a head pressure equal to the loss through the water heater and Air Handler. Combination Potable Water and Space Heating System • The Water Heater cannot be used for space heating applications only. • Only POTABLE water may be plumbed through the Water Heater. • Change the recirculation setting to “Always Recirc ON” mode referring to page 59. • Crossover valve is not available for the Space Heating system. Plumbing Applications

Multi-System The Quick Connect Multi-System allows the installation of two Water Heaters together utilizing only the Quick Connect Cord, sold separately. System Diagram • Connect a single Remote Controller to only one of the Water Heaters. • Water Heaters must be same model. Remote Controller Cord Gas Supply Cold Water Supply Hot Water Remote Controller External Remote Terminal Block Quick Connect Cord Cord Connector Cord Connector Air Vent Air Out Hot Water Return Pressure Relief Valve Expansion Tank [With the return line] Remote Controller Cord Gas Supply Cold Water Supply and Hot Water Return Hot Water Remote Controller External Remote Terminal Block Quick Connect Cord Cord Connector Cord Connector [With the Crossover Valve] Installation of the Quick Connect Multi-System

prevent freezing during cold weather and to prevent heat loss through the piping. Leave enough clearance around the plumbing to apply insulation. It will be necessary to add bends to the piping to ensure that this clearance is available. Make this distance ( ) as short as possible. The hot water temperature will become unstable as the pipe length increases. 3-18 in. (76-457 mm) 6 ft (1.8 m) Distance on sides Quick Connect Cord Size the piping to allow for the maximum flow rates of the Water Heaters. The backflow preventer should be placed upstream of the cold water branch. Cold Water Supply Hot Water Return Hot Water Air Vent, Air Out Pressure Relief Valve Expansion Tank Service Valve Kit with Pressure Relief Valve is necessary for flushing the Heat Exchanger. This allows for easy flushing of the system. Service Valve Kit with Pressure Relief Valve [With the return line] [With the Crossover Valve] Make this distance ( ) as short as possible. The hot water temperature will become unstable as the pipe length increases. 3-18 in. (76-457 mm) 6 ft (1.8 m) Distance on sides Quick Connect Cord Size the piping to allow for the maximum flow rates of the Water Heaters. The backflow preventer should be placed upstream of the cold water branch. Cold Water Supply and Hot Water Return Hot Water Service Valve Kit with Pressure Relief Valve is necessary for flushing the Heat Exchanger. This allows for easy flushing of the system. Service Valve Kit with Pressure Relief Valve Installation of the Quick Connect Multi-System

the Water Heater periodically. • Also check the items of maintenance described in the Owner’s Guide. 18.1 Periodic Check Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water. NOTICE [Venting System] • The venting system must be examined periodically by a qualified service technician to check for any leaks or corrosion. • Do not obstruct the flow of combustion and ventilation air. [Burner] • Check the burner flame periodically for a proper blue color and consistency. The burner flame must be blue, clear and stable. The image of normal or abnormal flame is as shown figure below. • If the flame does not appear normal, the burner may need to be cleaned by qualified service technician. [Pressure relief valve] • Operate the pressure relief valve once a year to ensure that it is functioning properly and there is no obstruction. Turn the power off to the Water Heater before opening the pressure relief valve, and make sure that water draining out of the valve will not cause any damage. • If the pressure relief valve discharges periodically, it may be due to thermal expansion in a closed water system. Contact the water supplier or a local plumbing inspector on how to correct this situation. Do not plug the pressure relief valve. [Water filter] • Check and clean the filter inside of cold inlet connection. e.g.) Normal Burner Flame e.g.) Abnormal Burner Flame Burner Blue Flame Yellow Flame or Liing Flame Maintenance

If the alarm code “C1#*” is flashing on the Remote Controller, it means there is Scale Build-up in the Heat Exchanger. To prevent damage to the Heat Exchanger from Scale Build-up, the Heat Exchanger needs to be flushed** to remove the Scale Build-up. Damage to the Water Heater due to Scale Build-up is not covered by the Water Heater’s warranty. To clear the alarm code “C1#*”, the Heat Exchanger must be flushed. If the alarm code “C1#*” is displayed and flashing on the Remote Controller, contact Pavilion Customer Center (1-855-443-8468). * Warning indication, # = 1-9 ** Connect the blue connector marked “FLUSH” for flushing near the Circuit Board when flushing the Heat Exchanger. After connecting it, the Water Heater is set to “Flushing Mode”. NOTE This procedure is only intended for use by a qualified service professional or authorized Service Representative. Any unauthorized use of this procedure may result in voiding the Pavilion Limited Warranty. Contact Pavilion Customer Center (1-855-443-8468) for additional support. NOTE The Water Heater must remain connected to the electrical power when flushing the Heat Exchanger. The preparation of the flushing system 1. Close the gas supply valve. 2. Close the water inlet valve (V1), the water outlet valve (V2) and the water return valve (V3). 3. Connect the one drain hose (H1) to the drain valve (V4), and then the other to the circulation pump. 4. Connect the drain hose (H2) to the circulation pump. 5. Connect the drain hose (H3) to the drain valve (V5). 6. Pour 1 gallon of “Calcium, Lime and Rust Removal Product” and 1 gallon water into the bucket. It is recommended “Calcium, Lime and Rust Removal Product” for flushing. 7. Place the both drain hoses (H2 and H3) into the bucket filled with the flushing solution. 8. Open the both drain valves (V4 and V5). Water Outlet Water Return Water Inlet Gas Supply V1 V4 V5 H3 H1 Water Heater Bucket Flushing Solution Circulation Pump H2 Gas Supply Valve Continue to connect V2 * Service Valve Kit with Pressure Relief Valve may be purchased as an accessory from an authorized wholesaler. This allows for full diagnostic testing and easy flushing of the system. Contact Pavilion Customer Center (1-855-443-8468) for more information. If a submersible pump is used, then only 2 hoses will be needed (H1 and H3). Water Inlet V1 V4 V2 V5 Water Outlet Service Valve Kit with Pressure Relief Valve* is necessary for flushing the Heat Exchanger. V3 Maintenance

[Procedure 1. Flushing the Heat Exchanger] 1. Open the front cover. 2. Connect the blue connector marked “FLUSH” for flushing near the Circuit Board. [Procedure 2. Cleaning the Heat Exchanger] The flushing solution needs to be rinsed and cleaned out of the Water Heater. Below is the way to rinse and clean the flushing solution. 1. Remove both drain hoses (H2 and H3) from the bucket. And then place the drain hose (H3) into the sink or outside to drain. 2. Close the drain valve (V3) and then open the water inlet valve (V1). Do not open the fresh water outlet valve (V2). 3. Clean the Water Heater with fresh water for 3 minutes or more. (Needs to have enough time to clean the Water Heater.) NOTE Check whether the reverse connection of the hose (H1) and (H3) if the display number will not change. In that case, the flow rate of the flushing solution may be under 1.5 GPM. 3. Then the code is displayed on the Remote Controller. 4. Turn on the circulation pump to circulate the flushing solution through the Water Heater for 1 hour at a rate of 1.5 GPM or more. 5. CCC 6. Turn off the circulation pump. NOTE The Water Heater has four “Water Drain Valves” on the bottom of the Water Heater. Place a bucket under the Water Heater to drain water from the “Water Drain Valves”. Carefully unscrew the “Water Drain Valves” to rinse flushing solution out of the Water Heater for about 10 seconds, then close the “Water Drain Valves”. 7. Close the front cover. 8. Open the gas supply valve and water outlet valve (V2). 9. Check for correct operation of the Water Heater. 4. Close the drain valve (V4) and then remove the drain hose (H3) from the drain valve (V4). 5. Remove the drain hose (H1) from the drain valve (V3). 6. Disconnect the blue connector marked “FLUSH” for flushing. The code “C00” goes out on the Remote Controller. Disconnect FLUSH Do not disconnect the blue connector marked “FLUSH” for flushing. C60 C59 C00 CCC The code “C60” is displayed on the Remote Controller when the Water Heater detects the flow of the flushing solution. When 1 minute passes, the code “C60” will change to “C59” on the Remote Controller. When 1 hour passes, the code “C00” is flashing on the Remote Controller. Circuit Board FLUSH FLUSH Connect Water Drain Valve Maintenance

connection of the hose (H1) and (H3) if the display number will not change. In that case, the flow rate of the flushing solution may be under 1.5 GPM. 6. Turn off the circulation pump. 7. Rinse and clean the flushing solution out of the Water Heaters in accordance with “For Single Water Heater [Procedure 2]”. (See the “Procedure 2.1-2.5”.) 8. Disconnect the blue connector marked “FLUSH” for flushing. The Code “C00” goes out on the Remote Controller. 9. Close the front covers. 10. Open the gas supply valves and water outlet valves. 11. Check for correct operation of the Water Heaters. 3. Then the code or is displayed on the Remote Controller. •“CCC” is displayed when the Blue Connector of the Main Water Heater is connected. •“FCC” is displayed when the Blue Connector of the Sub Water Heater is connected. 4. Turn on the circulation pump to circulate the flushing solution through the Water Heaters for 1 hour at a rate of 1.5 GPM or more. 5. CCC FCC For Quick Connect Multi-System 1. Open the front covers. 2. Connect the blue connector marked “FLUSH” for Water Heater needing to be flushed. (The Water Heater is isolated from Quick Connect Multi-system when the blue connector marked “FLUSH” for flushing is connected. Do not need to disconnect the Quick Connect Cord.) (e.g. The display when the both Water Heaters are flushed at the same time) Do not disconnect the blue connector marked “FLUSH” for flushing. C60 C59 C00 CCC FCC The code “C60” is displayed on the Remote Controller when the water heater detects the flow of the flushing solution. When 1 minute passes, the code “C60” will change to “C59” on the Remote Controller. When 1 hour passes, the code “C00” is flashing on the Remote Controller. or C50 C00 CCC Connect the Blue Connector of the Main Water Heater Detects the flow (10 minutes pass) FCC Connect the Blue Connector of the Sub Water Heater The remaining time of flushing gives indication priority to the connector which is connected later. Detects the flow Flashing (1 hour passes) C60 Sub Water Heater Main Water Heater Quick Connect Cord Do not need to disconnect. Remote Controller Circuit Board FLUSH FLUSH Connect Maintenance