Carrier FB4C Installation Instructions Manual page 12

R- -410A QUICK REFERENCE GUIDE
R- -410A refrigerant operates at 50- -70 percent higher pressures than R- -22. Be sure that servicing equipment and replacement
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components are designed to operate with R- -410A refrigerant.
R- -410A refrigerant cylinders are rose colored.
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Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.
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R- -410A refrigerant systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold
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hose when charging into suction line with compressor operating
Manifold sets should be 700 psig high side and 180 psig low side with 550 psig low- -side retard.
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Use hoses with 700 psig service pressure rating.
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Leak detectors should be designed to detect HFC refrigerant.
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R- -410A refrigerant, as with other HFCs, is only compatible with POE oils.
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Vacuum pumps will not remove moisture from oil.
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Do not use liquid- -line filter driers with rated working pressures less than 600 psig.
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Do not leave R- -410A refrigerant suction line filter driers in line longer than 72 hours.
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Do not install a suction- -line filter drier in liquid line.
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POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
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POE oils may cause damage to certain plastics and roofing materials.
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Wrap all filter driers and service valves with wet cloth when brazing.
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A factory approved liquid- -line filter drier is required on every unit.
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Do NOT use an R- -22 TXV.
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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
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TXV.
Never open system to atmosphere while it is under a vacuum.
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When system must be opened for service, recover refrigerant, evacuate then break vacuum with dry nitrogen and replace filter
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driers. Evacuate to 500 microns prior to recharging.
Do not vent R- -410A refrigerant into the atmosphere.
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Do not use capillary tube coils.
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Observe all warnings, cautions, and bold text.
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Copyright 2016 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.
Edition Date: 04/16
12
Catalog No: IM---FB4CNF---06
Replaces: IM--- FB4CNF--- 05