R- 410A Quick Reference Guide - International comfort products FXM4X 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 2018 International Comfort Products
Lewisburg, TN 37091 USA
Specifications are subject to change without notice.
Fan Coils: FEM4X, FEM4P, REM4X, FXM4X
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