506 01 2303 01 10/2019
Specifications are subject to change without notice.
INSTALLATION INSTRUCTIONS
R--410A Split System Heat Pump
CHS072 -- 121
NOTE: Read the entire instruction manual before starting
the installation
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 2....................
INSTALLATION GUIDELINES 3..................
Rated Indoor Airfl ow (cfm) 3.....................
INSTALLATION 7 -- 14...........................
Jobsite Survey 7................................
Step 1 -- Plan for Unit Location 7..................
Step 2 -- Complete Pre--Installation Checks 8.........
Step3–PrepareUnitMounting Support 8...........
Step 4 -- Rig and Mount the Unit 8.................
Step 5 -- Complete Refrigerant Piping Connections 8...
Step 6 -- Install Accessories 12....................
Step 7 -- Complete Electrical Connections 12.........
Step 8 -- Wind Baffles for Low Ambient Control 14...
PRE-START-UP 16...............................
System Checks 16..............................
Turn On Crankcase Heaters 16....................
Preliminary Charge 16...........................
START--UP 16 -- 25..............................
CHS Units 16..................................
OPERATING SEQUENCE 26......................
Indoor (Supply) Fan 26..........................
Cooling Unit Without E conomizer 26...............
Cooling Unit With Economizer 27.................
Heating 27....................................
Defrost Cycle 27...............................
Supplemental Heating/Emergency Heating 28........
Cooling and Heating Shutdown 28.................
ROUTINE SYSTEM MAINTENANCE 28............
Quarterly Inspection
(and 30 days after initial start) 28..................
SERVICE 29 - 42................................
Refrigeration System 29.........................
Compressor Oil 29..............................
Servicing Systems on Roofs
with Synthetic Materials 29.......................
Liquid Line Filter Driers 29.......................
Filed Refrigerant Access Ports 29..................
Outdoor Coil Mete ring Devices 29.................
Refrigerant System Pressure Access Ports 30.........
Compressor Protection 30........................
Crankcase Heater 30............................
Commercial Defrost Board 30.....................
Comfort Alert Diagnostic Module 38...............
Lubrication 40.................................
Outdoor Coil Maint enance and
Clea ning Recommendations 40....................
Fastener Torque Values 42........................
TROUBLESHOOTING 43.........................
APPENDIX A
Air Conditioner and Heat Pump with R--410A –
Quick Reference Guide 44........................
APPENDIX B
Wiring Diagram List 45..........................
APPENDIX C
Low
Ambient Option — Factory Installed 46.........
START--UP CHECKLIST 51 -- 52...................
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