Installation Manual

INST ALLATION INSTRUCTIONS Fan Coils: FCM4X

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R- 410A REFRIGERANT QUICK REFERENCE GUIDE

S R - 410A refrigerant operates at 50- 70 percent higher pressures than R- 22. Be sure that servicing equipment and

replacement components are designed to operate with R - 410A refrigerant

S R - 410A refrigerant cylinders are rose colored.

S Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.

S R - 410A refrigerant systems should be charged with liquid refrigerant. Use a commercial type metering device in the

manifold hose 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 R - 410A 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 R- 410A 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 R- 410A

refrigerant TXV.

S Never open system to atmosphere while it is under a vacuum.

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 R- 410A refrigerant into the atmosphere.

S Do not use capillary tube coils.

S Obse rve all warnings, cautions, and bold text.

S All indoor coils must be installed with a hard shutoff R - 410A refrigerant TXV metering device.

Lewisburg, TN 37091 USA