![background image](http://html1.mh-extra.com/html/carrier/infinity-15-seer-50xt-a/infinity-15-seer-50xt-a_installation-instructions-manual_2563550027.webp)
27
HEAT PUMP WITH PURON
REFRIGERATION SECTION QUICK--REFERENCE GUIDE
Puron refrigerant operates at 50--70 percent 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.
S
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.
S
Recovery cylinder service pressure rating must be 400 psig. DOT 4BA400 or DOT BW400.
S
Puron systems should be charged with liquid refrigerant. Use a commercial--type metering device in the manifold hose.
S
Manifold sets should be minimum700 psig high side and 180 psig low side with 550 psig low side retard.
S
Use hoses with minimum 700 psig service pressure rating.
S
Leak detectors should be designed to detect HFC refrigerant.
S
Puron, as with other HFCs, is only compatible with POE oils.
S
Vacuum pumps will not remove moisture from oil.
S
Only use factory--specified liquid--line filter driers with rated working pressures no less than 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 Puron liquid--line filter drier is required on every unit.
S
Do not use an R--22 TXV.
S
Never
open system to atmosphere while it is under a vacuum.
S
When system must be opened for service, break vacuum with dry nitrogen and replace filter driers.
S
Do not vent Puron into the atmosphere.
S
Observe all
warnings, cautions,
and
bold
text.
S
Do not leave Puron suction line driers in place for more than 72 hrs.
50X
T
--
A