R--410A Quick Reference Guide - International comfort products FEM4X Installation Instructions Manual

INSTALLATION INSTRUCTIONS
R- -410A QUICK REFERENCE GUIDE
 R--410A refrigerant operates at 50% -- 70% higher pressures than R--22. Be sure that servicing equipment and
replacement components are designed to operate with R--410A.
 R--410A refrigerant cylinders are rose colored.
 Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
 R--410A 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.
 R--410A, as with other HFC refrigerants, is only compatible with POE oils.
 POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
 POE oils may cause damage to certain plastics and roofing materials.
 Vacuum pumps will not remove moisture from oil.
 A liquid line filter--drier is required on every unit.
 Do not use liquid line filter--driers with rated working pressures less than 600 psig.
 Do not install a suction line filter--drier in liquid line.
 Wrap all filter--driers and service valves with wet cloth when brazing.
 Do not use capillary tube indoor coils.
 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 all filter--driers.
 Do not vent R--410A into the atmosphere.
 Observe all WARNINGS, CAUTIONS, NOTES, and bold text.
 Do NOT use R--22 TXV.
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Copyright 2016 International Comfort Products
Lewisburg, TN 37091 USA
Specifications are subject to change without notice.
Fan Coils: FEM4X, FEM4P, REM4X, REM4P
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