Subaru 1600 Service Manual page 569

HEATING, VENTILATING AND AIR·CONDITIONING SYSTEM
(2)
Run the engine at idling speed.
(3) Set temperature control dial and
fan switch at maximum cool and maxi-
mum speed respectively.
t
Fig. 13-60
5) When refrigerant can is empty,
fully close both valves of manifold
gauge and replace refrigerant can with
a new one.
Before opening manifold gauge valve
to charge refrigerant from new can,
be sure to purge air from inside charg-
ing hose.
6) Charge the specified amount of
refrigerant into system by weighing
charged refrigerant with scale. Over-
charging will cause discharge pressure
to rise.
NOTE:
Measure the amount of charged refrig·
erant with a scale.
Make a note of the amount charged
from can.
(4) Charge refrigerant while control-
ling low-pressure gauge reading at
275 kPa (2.8 kg/cm
2
,
40 psi) or less
by turning in or out low-pressure valve
of manifold gauge.
A26-038
A26-039
Fig. 13-61
Refrigerant capacity
Unit: kg (lb)
Refrigerant
Minimum Maximum
R-12 0.74 (1.63) 0.79 (1.74)
13-24
NOTE:
The presence of bubbles in sight glass
of receiver drier is an unsuitable
method of checking the amount of
refrigerant charged in system. The
state of the bu bbles in sight glass
should only be used for checking
whether the amount of charged refrig-
erant is small or not. The amount of
charged refrigerant can be correcdy
judged by means of discharge pressure.
Refer to "Refrigerant Level Check".
7) After the specified amount of
refrigerant has been charged into sys-
tem, close manifold gauge valves. Then
detach charging hoses from service
valves of system. Be sure to install
valve cap to service valve.
8) Confirm that there are no leaks in
system by checking with a leak detec-
tor.
Refer to "Checking for Leaks".
NOTE:
Conducting a performance test prior
to removing manifold gauge is a good
service operation. Refer to "Perform-
ance Test".
Oil separator
The Oil Separator Kit is used to
effiCiently withdraw the oil in the re-
frigeration system (that is, to separate
oil and refrigerant). If an excessive
quantity of oil is charged in the sys-
tem, or if the quantity of oil in the
system is unknown, adjust the quanti-
ty of oil in the system to specification,
proceeding as follows:
I) Discharge air conditioning system.
(Refer to "Discharging System".)
2) Using two special flexible hoses
and double union in Oil Separator Kit
connect oil separator between com-
pressor discharge side and condenser,
as shown.
3) Evacuate and charge system(Refer
to "Evacuating and Charging Sys-
tem.")
4) Fully open all windows or all
doors of car.
5) Operate compressor at engine
idling with air conditioner set for max-
imum cooling and high fan speed.
NOTE:
Never allow engine speed to exceed
idling speed.
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