Subaru 1600 Service Manual page 568

HEATING, VENTILATING AND AIR-CONDITIONING SYSTEM
Charging r.efrigerant
1) Install manifold gauge to system.
Refer to "Handling Manifold Gauge".
NOTE:
a. Be sure to purge air from the high-
and low-pressure charging hoses.
b. If air is mixed with refrigerant gas
in system, evacuation of system
should be performed. Refer to
"Evacuating System".
2) Attach center charging hose of
manifold gauge to refrigerant can
through can tap. Break seal of refriger-
ant can to allow refrigerant to enter
manifold gauge. Loosen charging hose
at the center fitting of manifold gauge
and purge air from inside charging
hose. Refer to "Handling Can Tap".
3)
Open high- and low-pressure valves
of manifold gauge and charge refriger-
ant into system.
NOTE:
a. When refrigerant charging speed is
slow, immerse refrigerant can in
water heated to a temperature of
about 40°C (104°F). However,
note that this is dangerous when
water is hot See Figure 13-58.
Immerse in water
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heated to about
, 40°C (104° F).
Fig. 13-58
CAUTION:
Note that hot
water is
dangerous.
A26'()36
a. Under any circumstances the refrig-
erant can must not
be
warmed in
water heated to a temperature of
over 52"C (126°F).
b. A blow torch or stove must never
be used to warm up the can.
c. When charging liquefied refrigerant
into the system .with the can turned
upside down to reduce charging
t
Fig. 13-57
time, charge it only through high
pressure valve, but not through
low-pressure valve.
Fig. 13-59
4) If refrigerant charging speed slows
down, charge it while running the
compressor for ease of charging. After
having taken the steps up to
(3)
above,
proceed with charging in the following
order.
13-23
t
A26-035
After completion of charging, the
compressor should always be turn-
ed several times manually.
t
A26'()37
(I)
Shut off high pressure valve of
manifold gauge.
CAUnON:
Never charge refrigerant through high
pressure side of system since this will
force refrigerant back into refrigerant
can and can may explode.