Installation guide

HEAT PUMP WITH PURON---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.
• Puron refrigerant cylthders manufactured pdor 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 sewice 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 manifoJd 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 holy compafibre with POE oils.
• Vacuum pumps wilt 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-ILne 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 valvec with wet cloth when brazing.
• A Puron liquid-line filter dner is requi_ed 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.
• Do not vent Puron into the atmosphere.
• Observe a_ warnings, cautions, and bo/d text.
• Do not leave Puron suction line driers in place for more than 72 hrs.
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