Carrier 38AUD - Appendix A; Appendix B; Air Conditioner & Heat Pump with Puron R; Quick Reference Guide

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APPENDIX A
Air Conditioner & Heat Pump with P URON

— Quick Reference Guide
S Puron

(R-410A) refrigerant operates at 50 percent to
70 percent higher pre ssures than R-22. Be sure t hat
servicing equipment and replacement c omponents are
designed to operate with Puron.
S Puron refrigera nt cylinders are rose colored.
S Recovery cylinder service pressure rating must be
2758 kPa (400 psig), DOT 4BA400 or DOT BW400.
S Puron systems should be charged with liquid
refrigerant. Use a comm ercial t ype metering device in
the manifold hose when charging into suction line with
compressor operating.
S Manifol d sets should be 4826 kPa (700 psig) high side
and 1241 kPa (180 psig) low side with 3290 kPa (550
psig) low-side retard.
S Use hoses with 4826 kPa (700 psig) service pressure
rating.
S Leak detectors should be designed to det ect HFC
refrigerant.
S Puron, as with other HFCs, is only compatible with
POE oils.
S Vacuum pumps will not remove moisture from oil.
S Use only factory specified liquid- line filter dr iers with
rated working pressures greater than 4137kPa (600 psig).
S Do not install a suction-line filter drier in liquid-line.
S POE oils absorb moisture rapidly. Do not expose oil to
atmosphere.
S POE oils may cause damage to certain plastics and
roofing materials.
S Wrap all filter driers and service valves with wet cloth
when brazing.
S A factory approved, liquid-line filter drier is required on
every unit.
S Do not use an R-22 TXV.
S If i ndoor unit is equipped with a TXV, it must be
changedtoaPuron

TXV.
S Never open system to at mosphere while i t is under a
vacuum .
S When system must be opened for service, recover
refrigerant, break vacuum with dry nitrogen before
opening system.
S Always replace filter drier after opening system for
service.
S Do not vent Puron

into the atmosphere.
S Do not use capillary tube coils.
S Observe all warnings, cautions,andbold text.
S All Puron

heat pumps must have indoor TXV.
S Do not leave Puron

suction line driers in place for
more than 72 hours.
APPENDIX B
Wiring Diagram List
38AU Size Electrical Characteristics Diagram Number
Z*07 400 ---3--- 50 38AU500495
Z*08 400 ---3--- 50 38AU500495
D*12 400---3 ---50 38AU500496
D*14 400---3 ---50 38AU500496
38AU