38AUQ
Heat Pump Condensing Units 60 Hz
with Puron® (R-410A) Refrigerant Sizes 07, 08, and 12
Installation, Start-Up and
Service Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 1 INSTALLATION GUIDELINES. . . . . . . . . . . . . . . . . . . . . . . 2 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Systems on Roofs with
Synthetic Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Liquid Line Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . 21 Filed Refrigerant Access Ports . . . . . . . . . . . . . . . . . 21 Outdoor Coil Metering Devices. . . . . . . . . . . . . . . . . 21 Refrigerant System Pressure Access Ports . . . . . . . . 21 Heat Pump Controls. . . . . . . . . . . . . . . . . . . . . . . . . . 22 Commercial Defrost Board . . . . . . . . . . . . . . . . . . . . . . 22 Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Compressor Protection. . . . . . . . . . . . . . . . . . . . . . . . . . 22
Comfort Alert Diagnostic Module . . . . . . . . . . . . . . 28 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Outdoor Coil Maintenance and Cleaning Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Fastener Torque Values . . . . . . . . . . . . . . . . . . . . . . . 31 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
APPENDIX A
Air Conditioner and Heat Pump with Puron® –
Quick Reference Guide . . . . . . . . . . . . . . . . . . . . . . . 33
APPENDIX B
Wiring Diagram List. . . . . . . . . . . . . . . . . . . . . . . . . 33
APPENDIX C
Motormaster Sensor Locations. . . . . . . . . . . . . . . . . 34
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use
Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloths for brazing operations and have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes and appropriate national electrical codes (in USA, ANSI/NFPA70, National Electrical Code (NEC); in Canada, CSA C22.1) for special requirements.
It is important to recognize safety information. This is the
Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety- alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices, which may 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.