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NOTE:
All inoperative compressors returned to Friedrich
must have all lines properly plugged with the
plugs from the replacement compressor.
REFRIGERANT CHARGE
1. The refrigerant charge is extremely critical. Measure
the charge carefully and as exactly as possible to
the nameplate charge.
2. The correct method for charging the rotary is to
introduce liquid refrigerant into the high side of the
system with the unit off. Then start the compressor
and enter the balance of the charge, gas only, into
the low side.
The introduction of liquid into the low side, without
the use of a capillary tube, will cause damage to
the discharge valve of the rotary compressor.
ROTARY COMPRESSOR SPECIAL
TROUBLESHOOTING AND SERVICE
Basically, troubleshooting and servicing rotary com-
pressors is the same as on the reciprocating compres-
sor with only a few exceptions.
1. Because of the spinning motion of the rotary, the
mounts are critical. If vibration is present, check
the mounts carefully.
2. The electrical terminals on the rotary are in a
different order than the reciprocating compressors.
The terminal markings are on the cover gasket.
Use your wiring diagram to insure the correct
connections.