Subaru Impreza 2002 Service Manual page 3182

8) Leave it at least 5 minutes, and then check the
low-pressure gauge reading for any changes.
When a gauge indicator shows near to zero point,
this is a sign of leakage. Check pipe connector
points, repair them, make sure there is no leakage
by air bleeding.
9) Following the can tap operation manual instruc-
tions, install it to the refrigerant can.
10) Disconnect the center manifold hose from the
vacuum pump, and connect the hose to the tap
valve.
11) When a 13.6 kg (30 lb) refrigerant container is
used, measure the refrigerant amount in use using
a weighting scale.
12) Confirm that all the 3 hoses are tightly connect-
ed to the manifold gauge set.
13) Open the valve on the HFC-134a source.
14) Loosen the center hose connection on the
manifold gauge set (if applicable, press a purge
valve on the manifold gauge set) only for a couple
of seconds to allow the air in the center hose to es-
cape by the refrigerant.
REFRIGERANT CHARGING PROCEDURE
G4M0980
G4M0981
G4M0603
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
15) Carefully open the high-pressure valve with the
engine stopping.
CAUTION:
Do not open the low-pressure valve.
CAUTION:
Never run the engine during charging from the
high-pressure side.
16) Close the high-pressure valve when the low-
pressure gauge reaches 98 kPa (1 kg/cm
Using a leak tester, check the system for leaks.
If any leakage is found after the refrigerant recov-
ery is completed, repair the applicable area.
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.
AC-23
G4M0604
2
, 14 psi).
G4M0605