Ford Corsar Repair Manual page 784

DISCHARGING, EVACUATING,
CHARGING AND CHECKING
T o low-pressure T o htgh-pressure
servtce valve
serv~ce valve
S l o w l open
SHA240B
T o low-pressure T o htgh-pressure
service
valve servtce valve
Vacuum p u m p
S H A 2 4 1 B
Elevation Vacuum of system*
m ( f t ) kPa (mbar, mmHg, inHg)
* : Values show reading o f the low-pressure gauge.
Slowly open the valves to discharge only refrigerant. If they are
opened quickly, compressor oil will also be discharged.
C
Evacuating the S y s t e m - 1 - 1
1. Start pump, then open both valves and run pump for about
5 minutes.
2. When low gauge has reached approx. 101.3 kPa (1,013 mbar,
760 mmHg, 29.92 inHg), completely close both valves of
gauge and stop vacuum pump. Let it stand for 5 to 10
minutes in this state and confirm that the reading does not
rise.
a. The low-pressure gauge reads lower by 3.3 kPa (33 mbar,
25 mmHg, 0.98 inHg) per 300 m (1,000 ft) elevation.
Perform evacuation according to the following table.
b. The rate of ascension of the low-pressure gauge should
be less than 3.3 kPa (33 mbar, 25 mmHg, 0.98 inHg) in 5
minutes.
1. Evacuate refrigerant system.
Refer to
" - 1 " .
2. Close manifold gauge valves securely and disconnect
charging hose from vacuum pump.
3. Purge air from center charging hose.
1) Connect center charging hose to refrigerant can through
charge valve.
2) Break seal of refrigerant can and purge alr.
4. Charge refrigerant into system.
WARNING:
Ensure that engine is off.
1) Open high-pressure valve of manifold gauge and charge
refrigerant into system.