Subaru 2002 IMPREZA Service Manual page 2502

HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
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.
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"
• Windows open
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.
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
LHD
HFC-134a
RHD
REFRIGERANT CHARGING PROCEDURE
G4M0606
G4M0608
Minimum Maximum
0.6 kg (1.3 lb) 0.7 kg (1.5 lb)
0.4 kg (0.9 lb) 0.5 kg (1.1 lb)
27) Disconnect the hose from the service port, and
install the service port cap.
AC-24