Carrier 38AUZ*07 Series Installation, Start-up And Service Instructions Manual

Contents

36APPENDIX AAIR CONDITIONER AND HEAT PUMP WITHPURON® — QUICK REFERENCE GUIDE• Puron ® (R-410A) refrigerant operates at 50 percent to70 percent higher pressures than R-22. Be sure thatservicing equipment and replacement components aredesigned to operate with Puron®.• Puron ® refrigerant cylinders are rose colored.• Recovery cylinder service pressure rating must be 400psig, DOT 4BA400 or DOT BW400.• Puron ® systems should be charged with liquidrefrigerant. Use a commercial type metering device inthe manifold hose when charging into suction line withcompressor operating.• Manifold sets should be 700 psig high side and 180 psiglow side with 550 psig low-side retard.• Use hoses with 700 psig service pressure rating.• Leak detectors should be designed to detect HFCrefirgerant.• Puron ®, as with other HFCs, is only compatible withPOE oils.• Vacuum pumps will not remove moisture from oil.• Use only factory specified liquid-line filter driers withrated working pressures greater than 600 psig.• Do not install a suction-line filter drier in liquid-line.• POE oils absorb moisture rapidly. Do not expose oil toatmosphere.• POE oils may cause damage to certain plastics androofing materials.• Wrap all filter driers and service valves with wet clothwhen brazing.• A factory approved, liquid-line filter drier is required onevery unit.• Do not use an R-22 TXV.• If indoor unit is equipped with a TXV, it must bechanged to a Puron ® TXV.• Never open system to atmosphere while it is under avacuum.• When system must be opened for service, recoverrefrigerant, break vacuum with dry nitrogen beforeopening system.• Always replace filter drier after opening system forservice.• Do not vent Puron ® into the atmosphere.• Do not use capillary tube coils.• Observe all warnings, cautions, and bold text.• All Puron ® heat pumps must have indoor TXV.• Do not leave Puron ® suction line driers in place formore than 72 hours.APPENDIX BWIRING DIAGRAM LIST38AUSize Electrical Characteristics Diagram NumberZ*07 208/230-3-60 38AU500432Z*08 208/230-3-60 38AU500432D*12 208/230-3-60 38AU500563D*14 208/230-3-60 38AU500563