Subaru Legacy 2004 Service Manual page 3385

17) After confirming that there are no leaks with the
leak test, charge the required amount of refrigerant.
CAUTION:
Never run the engine during charging from the
high-pressure side.
18) Close the high-pressure valve when;
• the readings of low- / high-pressure gauges be-
come almost equal, after the charging speed is re-
duced,
• the HFC-134a source becomes empty, or the
system is filled with the gas.
19) If the HFC-134a source is empty, close the
high-pressure valve, close the valve on the can tap,
and replace the HFC-134a source with a new one
to restart the operation.
(A)
(C)
(A) Low-pressure gauge (Compound pressure
gauge)
(B) High-pressure gauge
(C) Close
20) Confirm that both the low-/high-pressure
valves can be closed. Start the engine with the A/C
switch OFF.
21) Quickly repeat ON-OFF cycles a few times to
prevent initial compressor damage.
22) Set up the vehicle to the following status:
• A/C switch ON
• Engine running at 1,500 rpm
• Blower speed setting to "HI"
• Temperature setting to "MAX COOL"
• Air inlet setting to "RECIRC"
• Window open
Refrigerant Charging Procedure
AC-00032
(B)
(C)
AC-00033
AC-23
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
23) While reading the low-pressure gauge, careful-
ly open the low-pressure valve with the refrigerant
source connected and the service hose purged.
CAUTION:
Never open the high-pressure valve with the en-
gine running. The high-pressure gas will back-
flow resulting in an explosion of the can.
24) Adjust the refrigerant flow to maintain the pres-
sure on the low-pressure side at 276 kPa (2.81 kg/
2
cm , 40 psi) max.
25) After the system is fully charged, close the low-
pressure valve.
26) Close the valve on the refrigerant source.
Refrigerant amount
Refrigerant
HFC-134a 370 g (0.82 lb)
27) Disconnect the hose from the service port, and
install the service port cap.
AC-00034
Minimum Maximum
430 g (0.95 lb)