AIR CONDITIONER WITH PURON® (R-410A)—QUICK REFERENCE GUIDE
Puron refrigerant operates at 50%-70% higher pressures than R-22. Be sure that servicing equipment and replacement components are designed
to operate with Puron.
Puron refrigerant cylinders are rose colored.
•
Puron refrigerant cylinders manufactured prior to March 1, 1999, have a dip tube that allows liquid to flow out of cylinder in upright
position. Cylinders manufactured March 1, 1999 and later DO NOT have a dip tube and MUST be positioned upside down to allow liquid
to flow.
•
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.
•
Manifold sets should be 750 psig high-side and 200 psig low-side with 520 psig low-side retard.
•
Use hoses with 750 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.
•
Only use factory specified liquid-line filter driers with rated working pressures no less 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 roofing materials.
•
Wrap all filter driers and service valves with wet cloth when brazing.
•
A Puron liquid-line filter drier is required on every unit.
•
Do not use an R-22 TXV.
•
Never open system to atmosphere while it is under a vacuum.
•
When system must be opened for service, break vacuum with dry nitrogen and replace filter driers.
•
Always replace filter drier after opening system for service.
•
Do not vent Puron into the atmosphere.
•
Observe all
warnings
,
cautions
, and
bold text
.
•
Do not leave Puron suction line driers in place for more than 72 hrs.
20
