Low-Pressure Switches; Air Conditioner And Heat Pump With Puron Quick Reference Guide; Wiring Diagram List - Carrier 38AUQ Installation, Start-Up And Service Instructions Manual

APPENDIX A
AIR CONDITIONER AND HEAT PUMP WITH
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PURON QUICK REFERENCE GUIDE
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• Puron (R-410A) refrigerant operates at 50 percent to
70 percent higher pressures than R-22. Be sure that
servicing equipment and replacement components are
designed to operate with Puron
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• Puron refrigerant cylinders are rose colored.
• Recovery cylinder service pressure rating must be 400
psig, DOT 4BA400 or DOT BW400.
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• Puron systems should be charged with liquid
refrigerant. Use a commercial type metering device in
the manifold hose when charging into suction line with
compressor operating.
• Manifold sets should be 700 psig high side and 180 psig
low side with 550 psig low-side retard.
• Use hoses with 700 psig service pressure rating.
• Leak detectors should be designed to detect HFC
refirgerant.
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• Puron , as with other HFCs, is only compatible with
POE oils.
• Vacuum pumps will not remove moisture from oil.
• Use only factory specified liquid-line filter driers with
rated working pressures greater than 600 psig.
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APPENDIX B

WIRING DIAGRAM LIST

38AUQ
Size Electrical Characteristics
*07 208/230-3-60
460-3-60
575-3-60
*08 208/230-3-60
460-3-60
575-3-60
*12 208/230-3-60
460-3-60
575-3-60
• Do not install a suction-line filter drier in liquid-line.
• POE oils absorb moisture rapidly. Do not expose oil to
atmosphere.
• POE oils may cause damage to certain plastics and
roofing materials.
• Wrap all filter driers and service valves with wet cloth
when brazing.
• A factory approved, liquid-line filter drier is required on
every unit.
• Do not use an R-22 TXV.
• If indoor unit is equipped with a TXV, it must be
changed to a Puron
• Never open system to atmosphere while it is under a
vacuum.
• When system must be opened for service, recover
refrigerant, break vacuum with dry nitrogen before
opening system.
• Always replace filter drier after opening system for
service.
• Do not vent Puron
• Do not use capillary tube coils.
• Observe all warnings, cautions, and bold text.
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• All Puron heat pumps must have indoor TXV.
• Do not leave Puron
more than 72 hours.
Diagram Number
38AU500363
38AU500362
38AU500435
38AU500363
38AU500362
38AU500435
38AU500363
38AU500362
38AU500435
33
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TXV.
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into the atmosphere.
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suction line driers in place for