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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
compressors is the same as on the
reciprocating compressor 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.