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APPENDIX A — AIR CONDITIONER AND HEAT PUMP WITH PURON – QUICK REFERENCE GUIDE
•
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 refrigerant.
•
Puron refrigerant cylinders are rose colored.
•
Recovery cylinder service pressure rating must be
400 psig, DOT 4BA400 or DOT BW400.
•
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 refrigerant.
•
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 rat-
ed working pressures greater than 600 psig.
•
Do not install a suction-line filter drier in liquid-line.
UNIT
38AUZD/E07
38AUZD/E08
38AUZ*12
38AUZ*14
38AUD*12
38AUD*14
APPENDIX B — WIRING DIAGRAMS
ELECTRICAL
CHARACTERISTICS
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
208/230-3-60
460-3-60
575-3-60
34
•
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 TXV.
•
Never open system to atmosphere while it is under a vacuum.
•
When system must be opened for service, recover refriger-
ant, break vacuum with dry nitrogen before opening
system.
•
Always replace filter drier after opening system for service.
•
Do not vent Puron refrigerant 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 for more
than 72 hours.
DIAGRAM NUMBER
38AU000441
38AU000441
38AU000442
38AU000759
38AU000760
38AU000758
38AU501323
38AU501322
38AU501324
38AU501326
38AU501325
38AU501327
38AU501320
38AU501319
38AU501321
38AU501320
38AU501319
38AU501321
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