Subaru Legacy 2004 Service Manual page 3384

HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
7) Note the low-pressure gauge reading.
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, it
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.
(A)
(B)
(A) Tap valve
(B) Center manifold hose
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 weight scale.
(A) Refrigerant container (HFC-134a)
(B) Weight scale
Refrigerant Charging Procedure
AC-00027
AC-00028
(A)
(B)
AC-00029
AC-22
12) Confirm that all the 3 hoses are tightly connect-
ed to the manifold gauge set.
(A)
(C)
(A) Low-pressure gauge (Compound pressure
gauge)
(B) High-pressure gauge
(C) Close
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.
15) Carefully open the high-pressure valve with the
engine stopping.
CAUTION:
Do not open the low-pressure valve.
(A)
(C)
(A) Low-pressure gauge (Compound pressure
gauge)
(B) High-pressure gauge
(C) Close
(D) Ignition switch OFF
(E) Slowly open
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.
(B)
(C)
AC-00030
(B)
(D)
(E)
AC-00031
2
, 14 psi).