Carrier 25HCA - Puron Refrigerant Quick Reference Guide

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ENCE GUIDE
S 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 refrigerant
S Puron refrigerant cylinders are rose colored.
S Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
S Puron refrigerant systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold h
o
when charging into suction line with compressor operating
S Manifold sets should be 700 psig high side and 180 psig low side with 550 psig low---side retard.
S Use hoses with 700 psig service pressure rating.
S Leak detectors should be designed to detect HFC refrigerant.
S Puron refrigerant, as with other HFCs, is only compatible with POE oils.
S Vacuum pumps will not remove moisture from oil.
S Do not use liquid---line filter driers with rated working pressures less than 600 psig.
S Do not leave Puron refrigerant suction line filter driers in line longer than 72 hours.
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 factory approved liquid---line filter drier is required on every unit.
S Do NOT use an R ---22 TXV.
S If indoor unit is equipped with an R ---22 TXV or piston metering device, it must be changed to a hard shutoff Puron TXV.
S Never open system to atmosphere while it is under a vac uum.
S When system must be opened for service, recover refrigerant, evacuate then break vacuum with dry nitrogen and replace filter
driers. Evacuate to 500 microns prior to recharging.
S Do not vent Puron refrigerant into the atmosphere.
S Do not use capillary tube coils.
S Observe all warnings, cautions,andbold text.
S All indoor coils mus t be installed with a hard shut off Puron TXV met er ing device.
Copyright 2006 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Catalog No: 25HCA-- 3SI
Replaces: 25HCA--2SI
Printed in U.S.A. Edition Date: 11/06
25HCA