Carrier 50XZ024 Manuals

50XZ 024–060 Single-Packaged Heat Pump Units with Puron® (R-410A) Refrigerant Installation, Start-Up, and Service Instructions NOTE: Read the entire instruction manual before starting the installation. This symbol → indicates a change since the last issue. TABLE OF CONTENTS SAFETY CONSIDERATIONS.....................................................2 Introduction ....................................................................................2 Receiving and Installation..............................................................2 Check Equipment......................................................................2 IDENTIFY UNIT ................................................................2 INSPECT SHIPMENT........................................................2 Provide Unit Support................................................................2 ROOF CURB.......................................................................2 SLAB MOUNT ...................................................................2 GROUND MOUNT ............................................................2 Provide Clearances....................................................................2 Rig and Place Unit....................................................................3 INSPECTION ......................................................................3 INSTALLATION ................................................................4 Select and Install Ductwork .....................................................5 CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE UNITS.........7 Provide for Condensate Disposal.............................................7 Install Electrical Connections...................................................8 HIGH-VOLTAGE CONNECTIONS..................................8 ROUTING POWER LEADS INTO UNIT ........................9 CONNECTING GROUND LEAD TO GROUND LUG ..9 ROUTING CONTROL POWER WIRES (24-V)..............9 Easy Select™—50XZ .........................................................9 50XZ Sequence Of Operation...........................................17 SPECIAL PROCEDURES FOR 208-V OPERATION ...17 PRE-START-UP ..........................................................................18 START-UP...................................................................................18 50XZ: Start-Up .......................................................................18 Check for Refrigerant Leaks ..................................................19 Start-Up Adjustments..............................................................19 CHECKING COOLING AND HEATING CONTROL OP- ERATION..........................................................................19 CHECKING AND ADJUSTING REFRIGERANT CHARGE...........................................................................19 REFRIGERANT CHARGE ..............................................20 NO CHARGE....................................................................20 LOW CHARGE COOLING .............................................20 TO USE COOLING CHARGING CHARTS ..................20 INDOOR AIRFLOW AND AIRFLOW ADJUST- MENTS..............................................................................20 Defrost Control .......................................................................20 Quiet Shift..........................................................................20 Defrost................................................................................20 MAINTENANCE.........................................................................22 Air Filter..................................................................................23 Indoor Blower and Motor.......................................................23 Outdoor Coil, Indoor Coil, and Condensate Drain Pan ........23 Outdoor Fan ............................................................................24 Electrical Controls and Wiring...............................................24 Refrigerant Circuit ..................................................................24 Indoor Airflow ........................................................................24 Metering Devices–TXV & Accurater Piston.........................24 Pressure Switches....................................................................25 Loss of Charge Switch ...........................................................25 High-Pressure Switch..............................................................25 Copeland Scroll Compressor (Puron Refrigerant).................26 Refrigerant System..................................................................26 Refrigerant .........................................................................26 Compressor Oil..................................................................26 Servicing Systems on Roofs with Synthetic Materials....26 Liquid Line Filter Drier ....................................................26 Puron (R-410A) Refrigerant Charging .............................26 System Information.................................................................26 Loss of Charge Switch......................................................26 Check Defrost Thermostat ................................................26 TROUBLESHOOTING ...............................................................27 Start-Up Checklist........................................................................27 NOTE TO INSTALLER — READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY before installing this unit. Also, make sure the Owner’s Manual and Service Instructions are left with the unit after installation. Fig. 1—Unit 50XZ C99064 Visit www.carrier.com Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 Tab 5a 5a PC 101 Catalog No. 535–00114 Printed in U.S.A. Form 50XZ-2SI Pg 1 8–03 Replaces: 50XZ-1SI

HFATUNG & COOLING SingMe-Packaged EMectric Heat Pump Unit with Puron® (R-410A) Refrigerant %isitx__ _.carrier.com A Guide to Operating and Maintaining Your Single-Packaged Electric Heat Pump Unit NOTE: Read the entire instruction manual be%re starting the installation. SAFETY CONSIDERATIONS Installation and servicing of air:conditioning equipment can be hazardous &/e to system pressure and electrical components Only trained and qualified personnel should install, repair, or service air-conditioning equipment Untrained personnel can perfom_ basic maintenance fonctions of cleaning coils and filters. All other operations should be perfbrmed by tlained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags, and labels attached to the unit, and other safety precautions that may apply. Follow all safe V codes. Wear safety" glasses and work gloves. Use quenching cloth fbr unbrazing operations. Have fire extinguisher available for all brazing operations. Recognize safety information. This is the saf?ty=alert symbolfi._. When you see this symbol on the product or in instructions or manuals, be alert to the potential for personal injury. Understand the signal words DANGER, WARNfNG, CAU= TION, and NOTE. Danger identifies the most serious hazards, which will result in severe personal injury- or death. Warning indicates a condition d'mt could cause serious personal it{jury," or death. Caution is used to identify unsafe practices, which would result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation. Note to Installer:This manual should be left with the equipment user, Do not store or use gasoline or other flamnmble vapors and liquids in the vicinity' of this or any other appliance. Failure to follow this warning could result in fire, serious injury, or death Do not use this unit if any part has been under water. Imntediately call a qualified service technician to inspect the unit and to replace any part of the cormol system which has been under water Failure to follow this warning could result in electrical shock, fire, serious ir_jury, or death. Before performing recommended maintenance, be sure the main power s_itch to unit is turned off. Electric shock could cause serious i11iury or death. C99064 Fig. 1--Unit 50XZ b, Select temperature and set SYSTEM switch or MODE control to desired mode 2 To shut unit off: NOTE: If the unit is being shut down because of" a malfunction, call your dealer as soon as possible. a. Set system SWITCH or MODE control to OFF. b. Turn off the electrical power supply to unit. OPERATING YOUR HEAT PUMP ]"he operation of yore heat pump system is controlled by the indoor them_ostat. Yott simply adjust the them_ostat and it maintains the indoor temperature at the level you selecL Most thermostats of heat pump systems have 3 controls: a temperature conhol selector, a FAN control, and a SYSTEM or MODE control. Refer to your thermostat owner's manual for more infbmmtion To better protect your investment and to eliminate unnecessao,- service calls, familiarize yourself with the _k_llowing facts: 1. During heating, increasing the thermostat setting more than 2°F may cause the supplemental heaters to be turned on for a short period of time to satisfy the themmstat. Needless use of the supplementary heat reduces potential energy savings. STARTING OR SHUTTING UNiT OFF 1, To start the trait: a. Turn on the electrical po_er supply to unit. Nanufacturer reserves the r}ght to discontinue, or change at any time, specifications or designs wRhout notice and without incurring oNigations. PC 101 Catalog No 535-00069 Printed in US.A. Form OM50-33 Pg 1 4-03 Replaces: New