Installation Manual

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Specifications subject to change without notice.

R- 410A QUICK REFERENCE GUIDE

 Observe all WARNINGS, CAUTIONS, NOTES, and bold text.

 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.

 Vacuum pumps will not remove moisture from oil.

 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.

 POE oils absorb moisture rapidly. Do not expose oil to atmosphere.

 POE oils may cause damage to certain plastics and roofing materials.

 Wrap all filter- driers and service valves with wet cloth when brazing.

 A liquid line filter- drier is required on every unit.

 DonotusewithanR-22TXV.

 If indoor unit is equipped with an R- 22 TXV, it must be changed to an R- 410A TXV.

 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.

 Do not use capillary tube indoor coils.

Use of the AHRI Certified

TM Mark indicates a

manufacturer’s

participation in the

program For verification

of certification for individual

products, go to

www.ahridirectory.org.

Lewisburg, TN 37091 USA