Refrigerant-12 Disposable Can Method; Schematic - Charging Refrigeration System - Pontiac Grand Prix Service Manual

CUSTOM AIR CONDITIONING 1A-5
fig.
1A-3
Schematic - Charging Refrigeration System
hbbles are observed, open low pressure gauge valve
REFRIGERANT-12 DISPOSABLE CAN METHOD
and valve on refrigerant drum to allow more refriger-
ant to enter system. Close valve when receiver-dehydra-
tor clears up.
After having depressurized, repaired (if necessary),
and evacuated the refrigerant system, the system may
NOTE: Ifair inlet temperature is below 71PF. when this
be charged as follows when using Refrigerant-12
check is made, bubbles may appear even though the
disposable cans:
proper amount of refrigerant is in the system. Air inlet
temperature must be 71PF. or above to make an accurate 1. Obtain four (for Firebird) or five (for Pontiac or
check.
Tempest) "one" pound cans of Refrigerant-12.
8. When refrigerant has been installed, continue to 2. Mount three cans in J 6272 No. 3 Multi-opener or
operate system and test for proper operation as attach J 6271 Fitz-All valve (single can opener valve)
outlined under OPERATION TEST.
on one can.
9. When satisfied that air conditioning system is
operating properly, stop engine, remove gauge set and
replace protective caps on P.O.A. valve and compres-
sor fittings.
NOTE: A considerable amount of refrigerant will colkct
in the high pressure line, since some of this rejhgerant
will have condensed into liquid repigerant. Wrap the
high pressure gauge firing at the compressor with a shop
cloth ,before disconnecting the Schrader valve f?om the
gauge fitting, to prevent injury to personnel.
10. Using leak detector J 6085, check complete system
for leaks, as explained under LEAK DETECTORS.
CA UTION: Make sure outlet valve on opener is closed
(clockwise) before installing opener.
a.
If the J 6272 No. 3 Multi-opener is used, raise
locking lever, position three cans of refrigerant and
force locking lever down to secure cans and at same
time puncture top of can to make it ready for charging.
b. If the J 6271 Fitz-All valve is used, back off the
valve from the can top retainer, slip the valve onto the
can and turn the valve into retainer until tight. DO
NOT open outlet valve during this operation as
turning the valve into the retainer punctures top of can
to make it ready for charging.