Carrier FB4CNP Installation Instructions Manual page 12

R−410A 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 a 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 Observe all warnings, cautions, and bold text.
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Copyright 2019 CAC / BDP D 7310 W. Morris St. D Indianapolis, IN 46231
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
TRAINING
Edition Date: 6/19
12
Catalog No: IM-FB4C-FX4D-02
Replaces: IM-FB4C-FX4D-01