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I Split System Condensers R410-A Installation Instructions I
R410-A QUICK REFERENCE GUIDE
R-410A refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servic-
ing equipment and replacement components are designed to operate with R-410A.
R410-A refrigerant cylinders are rose colored.
R410-A refrigerant cylinders have a dip tube which allows liquid to flow out of cylinder in upright
position. Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT
BW400.
Enviromax systems should be charged with liquid refrigerant. Use a commercial type metering
device in the manifold hose. Manifold sets should be 800 psig high side and 250 psig low side with
550 psig low-side retard.
Use hoses with 800 psig service pressure rating.
Leak detectors should be designed to detect HFC refrigerant. R410-A, as with other HFCs, 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. Wrap all filter driers and
service valves with wet cloth when brazing. A liquid-line filter drier is required on every unit.
DO NOT use an R-22 TXV.
If indoor unit is equipped with an R-22 TXV, it must be changed to a R410-A TXV. Never open
system to atmosphere while it is under a vacuum.
When system must be opened for service, evacuate then break vacuum with dry nitrogen and
replace filter driers. DO NOT vent R410-A into the atmosphere.
DO NOT use capillary tube coils.
Observe all warnings, cautions, and bold text.
Personal Injuury Hazard
Relieve pressure and recover all refrigerant be-
fore system repair or final unit disposal to avoid
personal injury or death. Use all service ports and
open all flow-control devices, including solenoid
valves.