Carrier 38AUQ Installation, Start-up And Service Instructions Manual

Also see for 38AUQ: Installation, Start-Up and Service Instructions Installation and service instructions

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Installation, Start-Upand Service InstructionsCONTENTSSAFETY CONSIDERATIONS .................... 2INSTALLATION GUIDELINES .................. 3INSTALLATION ........................... 7- 16Step 1 - Plan for Unit Location .................. 7Step 2 - Complete Pre-Installation Checks ......... 8Step 3 - Prepare Unit Mounting Support ........... 8Step 4 - Rig and Mount the Unit ................. 8Step 5 - Complete Refrigerant Piping Connections... 8Step 6 - Install Accessories .................... 12Step 7 - Complete Electrical Connections ......... 12PRE-START-UP ............................... 17System Checks .............................. 17Turn On Crankcase Heaters .................... 17Preliminary Charge ........................... 17START-UP .............................. 17 - 2038AUQ Units ............................... 17OPERATING SEQUENCE ...................... 21Indoor (Supply) Fan .......................... 21Cooling Unit Without Economizer ............... 21Cooling Unit With Economizer ................. 21Defrost Cycle ............................... 21Supplemental Heating/Emergency Heating ........ 22Cooling and Heating Shutdown ................. 22ROUTINE SYSTEM MAINTENANCE ............ 22Quarterly Inspection(and 30 days after initial start) .................. 22SERVICE ................................ 23 - 35Refrigeration System ......................... 23Compressor Oil .............................. 23Servicing Systems on Roofswith Synthetic Materials ....................... 23Liquid Line Filter Driers ....................... 23Filed Refrigerant Access Ports .................. 23Outdoor Coil Metering Devices ................. 23Refrigerant System Pressure Access Ports ......... 24Compressor Protection ........................ 24Crankcase Heater ............................ 24Commercial Defrost Board ..................... 24Comfort Alert Diagnostic Module ............... 31Lubrication ................................. 33Outdoor Coil Maintenance andCleaning Recommendations .................... 33Service Parts ................................ 35Fastener Torque Values ........................ 35TROUBLESHOOTING ......................... 36APPENDIX AAir Conditioner and Heat Pump with Puron _n_-Quick Reference Guide ........................ 37APPENDIX BWiring Diagram List .......................... 37APPENDIX CLow Ambient Option -- Factory Installed ......... 38START-UP CHECKLIST ................... 43 - 44