Carrier 50ZH024-060 Installation, Start-up And Service Instructions Manual

Also see for 50ZH024: Product data Installation instructions

Contents

50ZH024-060Packaged Heat Pump UnitsInstallation, Start-Up and Service InstructionsNOTE: Read the entire instruction manual before starting theinstallation.TABLE OF CONTENTSSAFETY CONSIDERATIONS .....................................................1INTRODUCTION ..........................................................................2RECEIVING AND INSTALLATION ..........................................2Check Equipment......................................................................2IDENTIFY UNIT ................................................................2INSPECT SHIPMENT ........................................................2Provide Unit Support ................................................................2SLAB MOUNT ...................................................................2GROUND MOUNT ............................................................2Provide Clearances....................................................................2Place Unit..................................................................................2Select and Install Ductwork .....................................................2INSTALL FLANGES FOR DUCTWORK CONNEC-TIONS (50ZH060 ONLY) ..................................................6CONVERTING HORIZONTAL DISCHARGE UNITS TODOWNFLOW (VERTICAL) DISCHARGE......................6Provide for Condensate Disposal .............................................6Install Electrical Connections...................................................7HIGH-VOLTAGE CONNECTIONS..................................7ROUTING POWER LEADS INTO UNIT ........................8CONNECTING GROUND LEAD TO UNITGROUND ............................................................................8ROUTING CONTROL POWER WIRES ..........................8ACCESSORY ELECTRIC HEAT WIRING .....................8SPECIAL PROCEDURES FOR 208-V OPERATION .....8PRE-START-UP ............................................................................9START-UP .....................................................................................9Check for Refrigerant Leaks ..................................................10LOCATE AND REPAIR REFRIGERANT LEAKS ANDCHARGE THE UNIT AS FOLLOWS: ...........................10Start-Up Cooling Section and Make Adjustments ................10CHECKING COOLING CONTROL OPERATION .......10COMPRESSOR ROTATION ...........................................10Refrigerant Charge..................................................................10NO CHARGE ....................................................................10LOW CHARGE COOLING .............................................10TO USE THE COOLING CHARGING CHART............10HEATING MODE CHARGE...........................................11Indoor Airflow and Airflow Adjustments..............................11FOR 208/230-V .................................................................12FOR 460-V MOTORS ......................................................12Unit Controls...........................................................................12HIGH-PRESSURE RELIEF VALVE...............................12LOSS OF CHARGE SWITCH.........................................12COMPRESSOR OVERLOAD..........................................12Sequence of Operation............................................................12FAN OPERATION............................................................12COOLING..........................................................................14HEAT PUMP HEATING..................................................14DEFROST..........................................................................15ELECTRIC RESISTANCE HEATING............................15MAINTENANCE.........................................................................15Air Filter..................................................................................16Unit Top Removal (Outdoor-Coil Side) ................................16Indoor Blower and Motor.......................................................16Outdoor Coil, Indoor Coil, and Condensate Drain Pan ........16Outdoor Fan ............................................................................17Electrical Controls and Wiring...............................................18Refrigerant Circuit ..................................................................18Indoor Airflow ........................................................................18Metering Devices ....................................................................18Lubrication ..............................................................................18Liquid Line Strainer................................................................18High Flow Valves...................................................................19TROUBLESHOOTING ...............................................................22START-UP CHECKLIST............................................................23NOTE TO INSTALLER—Before installation, READ THESEINSTRUCTIONS CAREFULLY AND COMPLETELY. Also,make sure the User’s Manual and Replacement Guide are left withthe unit after installation.SAFETY CONSIDERATIONSInstallation and servicing of air-conditioning equipment can behazardous due to system pressure and electrical components. Onlytrained and qualified workers should install, repair, or serviceair-conditioning equipment.Untrained workers can perform basic maintenance functions ofcleaning coils and filters. All other operations should be performedby trained service people. When working on air-conditioningFig. 1—Unit 50ZHC00155Visit www.carrier.comManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 1 4Tab 6 8 PC 101 Catalog No. 535-00080 Printed in U.S.A. Form 50ZH-5SI Pg 1 7-03 Replaces: 50ZH-4SI