Service Station Method; Filling Charging Cylinder; Charging The System Using J 8393 - Pontiac Grand Prix Service Manual

1A-6 1969 PONTIAC SERVICE MANUAL
3. Connect center flexible line of gauge set to fitting on
a can opener valve.
NOTE: If line at center gauge jtting has not been
purged of air, loosen line at center Jitting on gauge set
and "crack" valve at can opener (for a second or two) to
force air from the line. Retighten line at centerjtting.
4. Open valve on No. 3 Multi-opener (or on single can)
and also low pressure and high pressure valves on
manifold gauge set. Leave can valve open until all
refrigerant has entered the refrigeration system. Close
valve on can.
a. If the system is charged using single cans and the J
6271 valve, disconnect valve from can, leaving valve
closed to flexible line to the center fitting of the
manifold gauge set. Install valve on a new and full
disposable can of Refrigerant-12, and repeat until four
and-one-third one pound cans of refrigerant have been
used to charge system.
Actual net weight of refrigerant is 15 02s. per can,
therefore it will be necessary to use four and one-third
cans for Pontiac or Tempest, four cans for Firebird.
b. If system is charged using the 3 can Multi-opener, J
6272, close the valve of opener after all cans are
empty. Release the locking lever and discard the three
empty cans. If this tool will be used to complete the
charge with additional cans to bring the required
refrigerant charge, then leave two of the cans emptied
in position, locate the one full can and lock the lever
into place. (These empty cans balance the assembly
and prevent the loss of refrigerant out the open
"series" passage.)
NOTE: Align the pierced hole in the empty can with the
punch in the cover of the tool. If the J 6271 Fitz-All
valve for single cans is available, complete charging as
explained in 4a above.
5. Close valves on manifold gauge set.
6. Operate engine at 2000 rpm with temperature
control knob at full cold position and blower control
for high speed in A/C mode.
NOTE: If air inlet temperature at the condenser is below
71PF. when this check is made, bubbles may appear even
though the proper amount of refrigerant is in the system.
Air inlet temperature must be 7 W . or above to make an
accurate check.
7. When refrigerant, has been installed, continue to
operate system and test for proper operation as
outlined under OPERATIONAL TEST.
8. When satisfied that air conditioning system is
operating properly, stop engine, remove gauge set and
replace protective caps on suction and discharge
fittings.
NOTE: A considerable amount of refrigerant will collect
in the high pressure line, since some of this refrigerant
will have condensed into liquid refrigerant. Wrap the
high pressure Jitting at the compressor with a shop cioth
before disconnecting the Schrader valve from the gauge
jitting to prevent damage or injury to personnel.
9. Using leak detector J 6084, check complete system
for leaks as explained under LEAK DETECTORS.
SERVICE STATION METHOD
INSTALLING J 8393
1. Be certain compressor hand shut-off valves are
closed to gauge fittings (counterclockwise).
2. Be certain all valves on charging station are closed.
3. Connect high pressure gauge line (with J 6163
'
attached) to compressor high pressure gauge fitting.
4. Turn high pressure hand shut-off valve one turn
clockwise, and high pressure control (2) one turn
counterclockwise (open). Crack open low pressure
control (1) and allow refrigerant gas to hiss from low
pressure gauge line for three second{ then connect low
pressure gauge line to low pressure gauge fitting on
P.O.A. valve. (Place J 6163 adapter on hose, then
attach adapter to gauge fitting.)
FILLING CHARGING CYLINDER
1. Open control valve on refrigerant container.
2. Open valve on bottom of charging cylinder
allowing refrigerant to enter cylinder.
3. Bleed charging cylinder to valve (behind control
panel) only as required to allow refrigerant to enter
cylinder. When refrigerant reaches desired charge
level (4 118 or 3 3/4), close valve at bottom of
charging cylinder and be certain cylinder bleed valve
is closed securely.
NOTE: While filling the cylinder, it will be necessary to
close the bleed valve periodically to allow boiling to
subside so that refrigerant level in the charging cylinder
can be accurately read.
CHARGING THE SYSTEM USING J 8393
1. With charging station installed as previously
described, remove low pressure gauge line at P.O.A.
valve.
2. Crack open high (No. 2) and low (No. 1) pressure
control valves on station, and allow refrigerant gas to
purge from system. Purge slowly enough so that oil
does not escape from system along with refrigerant.
3. When refrigerant flow nearly stops, connect low
pressure gauge line to P.O.A. valve.