Subaru B9 TRIBECA WX 2007 Manual page 503

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HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
17) After confirming that there are no leaks with the
leak test, charge the required amount of refrigerant.
CAUTION:
Never run the engine while 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 full 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 part
to restart the operation.
(A)
(C)
(A) Low-pressure gauge
(Compound pressure gauge)
(B) High-pressure gauge
(C) Close
NOTE:
When replacing HFC-134a source with a new part,
loosen the center hose connection on the manifold
gauge set (if applicable, press a purge valve on the
manifold gauge set) for a few seconds to discharge
the air in the center hose by the refrigerant pres-
sure.
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.
Refrigerant Charging Procedure
22) Set up the vehicle as follows:
• A/C switch ON
• Engine running at 1,500 rpm
• Blower setting speed "HI" (For models with rear
coolers, also turn the rear cooler fan switch to "HI")
• Temperature setting to "MAX COOL"
• Air inlet setting to "RECIRC"
• Window 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. The high-pressure gas will back-
flow resulting in an explosion of the can.
AC-00032
24) Adjust the refrigerant flow to maintain the pres-
sure on the low-pressure side at 276 kPa (2.81 kg/
cm
(B)
25) After the system is fully charged, close the low-
pressure valve.
26) Close the valve on the refrigerant source.
(C)
AC-00033
Single A/C model
Dual A/C model
27) Disconnect the hose from the service port, and
install the service port cap.
AC-24
2
, 40 psi) max.
Refrigerant amount
Refrigerant
Minimum
(HFC-134a)
20 OZ
(0.57 kg, 1.26 lb)
30 OZ
(0.84 kg, 1.85 lb)
AC-00034
Maximum
22 OZ
(0.63 kg, 1.39 lb)
32 OZ
(0.90 kg, 1.98 lb)