Subaru SVX 1992 Manual page 990

4-7 [WO081 AUTOMATIC AIR CONDITIONING SYSTEM
Low-pressure gauge
(Compound pressure gauge) High-pressure gauge
OFF
,tix' :r
:sl's . .,
OFF
rj , ~_
Close
_ ._
_
Slowly
G
open
84-695
Fig. 36
S . CHECK THE GAUGE READINGS
When both the high- and low-pressure gauge readings are
about equal, or the R134a source is empty, or the system
has been filled to specifications, close the high- pressure
manifold valve.
134-696
Fig. 37
6 . ADD ADDITIONAL CANS
If the R134a source is exhausted, first close the high- pres-
sure manifold valve, second, close the can tap valve, then
slowly purge the refrigerant from the service hose by loos-
ening the fitting at the can tap.
7. COMPLETE CHARGING THROUGH THE LOW
SIDE
1) Verify that the high-pressure manifold valve is closed
(should have already been closed) .
2) Verify that the low-pressure manifold valve is closed
(should have already been closed) .
Low-pressure gauge
(Compound pressure gauge)
High-pressure gauge
Close `J
- -
Close
IL~11
IIl~~1I
IL~~I 134-697
Fig. 38
3) With the OFF switch on and the windows rolled down,
start the engine and run at engine speed.
4) Set the temperature controls on max cold and set the
blower speed on the highest setting.
5) Alternately press the AUTO and ECON switches several
times at intervals of more than 10 seconds to prevent initial
compressor damage due to "load shock." Finish this oper-
ation with the AUTO switch in the ON position .
6) Raise engine speed to approximately 1,500 rpm.
8. CHARGE THE SYSTEM
1) With the refrigerant source connected and the service
hose purged, slowly open the low-pressure manifold valve,
while checking the low-pressure gauge reading.
The refrigerant source must be positioned for vapor
(valve up).
2) Keep the low side pressure below 276 kPa (2.81 kg/cm2,
40 psi) by using the low-pressure manifold valve to regulate
the flow of refrigerant into the system .
°/r
134-6991
Fig. 39
18