INSTALLATION INSTRUCTIONS Fan Coils: FEM4X, FEM4P, REM4X
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Specifications are subject to change without notice.
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.
Copyright 2017 International Comfort Products
Lewisburg, TN 37091 USA
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