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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 servic-
ing 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 refrig-
erant.
• 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.
• 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 roof-
ing 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 vac-
uum.
• When system must be opened for service, recover refrig-
erant, break vacuum with dry nitrogen before opening
system.
• Always replace filter drier after opening system for ser-
vice.
• 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.
Summary of Contents for Gemini 38AU07 Series
Page 5: ...5 Fig 3 38AUD Z 07 14 Base Unit Dimensions ...
Page 19: ...19 Fig 17 Typical Single Circuit Single Stage 38AUZ Wiring Diagrams ...
Page 20: ...20 Fig 18 Typical Single Circuit Two Stage 38AUZ Wiring Diagram ...
Page 21: ...21 Fig 19 Typical Dual Circuit Two Stage 38AUD Wiring Diagram ...
Page 30: ...30 Fig 30 38AUZD E08 Charging Chart RTPF 7 5 Ton Dual Stage Charging Chart R 410A Refrigerant ...
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