Subaru 1600 Service Manual page 566

HEATING, VENTILATING AND AIR·CONDITIONINGSYSTEM
4) Since packing of charging hose
will be lost during long use, always
check packing prior to installing charg-
ing hose.
Close
1 Cap
2 Se rvi ce val ve
3 Charging hose
4 Packing
5 Check valve
Fig. 13-51
Handling can tap
Open
.---(.~)
-(fl
A26-029
A wide variety of can taps are avail-
able. The following procedures apply
to conventional can taps:
For the correct usage, refer to the
manufacturer's instructions.
CAUTION:
Use can tap of good quality.
I) Connect charging hose to the
center fitting of manifold gauge. At
this time, confirm that both stems are
fully turned in (front-seated).
2) Turn can tap handle fully counter-
clockwise so that the needle is pulled
up.
3) Attach can tap to refrigerant can
firmly.
4) Turn can tap handle fully clock-
wise to make a hole in refrigerant can.
5) Turn the handle fully counter-
clockwise to raise the needle. Refriger-
ant gas will flow up to the center
fitting of manifold gauge.
6) Loosen the connection at the
center fitting of manifold gauge for a
few seconds to purge air inside charg-
ing hose.
(Clockwise)
~~~Sr----(l;
(2)
1CSq:!:z:~
--{4)
(Counterclockwise)
1 Can tap handle
2 Charging hose
3 Needle
4 Refrigerant can
Fig. 13-52
Fig. 13-54
A26-030
•
13-21
. . . . . . . .
J ~
Purging
~ir
A26-031
Fig. 13-53
Discharging system
The pressurized refrigerant gas inside
system must be discharged to a pres-
sure approaching atmospheric pressure
prior to evacuating refrigerant inside
system. This operation should be made
to permit safe removal when replacing
system components.
I) Close high- and low-pressure valves
of manifold gauge fully.
2) Connect two charging hoses of
manifold gauge to their respective
service valves.
3) Open both manifold gauge valves
slightly and slowly discharge refriger-
ant from system.
NOTE:
00 not allow refrigerant to rush out.
Otherwise, compressor oil will be dis-
charged along with refrigerant
A26-032
. .-J