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APPENDIX A — AIR CONDITIONER AND HEAT PUMP WITH R-410A –
•
R-410A refrigerant operates at 50 percent to 70 per-
cent higher pressures than R-22. Be sure that servic-
ing equipment and replacement components are de-
signed to operate with R-410A refrigerant.
•
R-410A refrigerant cylinders are rose colored.
•
Recovery cylinder service pressure rating must be
400 psig, DOT 4BA400 or DOT BW400.
•
R-410A systems should be charged with liquid refrig-
erant. 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.
•
R-410A, 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.
•
Do not install a suction-line filter drier in liquid-line.
•
POE oils absorb moisture rapidly. Do not expose oil
to atmosphere.
UNIT
CAS072
CAS091
CAS121
CAS151
CAS123
CAS153
CAS-072-153-01SI Rev. A
QUICK REFERENCE GUIDE
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
Specifications subject to change without notice.
•
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 an R-410A TXV.
•
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 R-410A refrigerant into the atmosphere.
•
Do not use capillary tube coils.
•
Observe all warnings, cautions, and bold text.
•
All R-410A heat pumps must have indoor TXV.
•
Do not leave R-410A 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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