Subaru IMPREZA GD 2007 Series Manual page 3918

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2) Install the low pressure hose and high pressure
hoses to the corresponding service ports on the ve-
hicle.
(1)
(1) Low-pressure side service port
(2) High-pressure side service port
(3) Close
CAUTION:
Confirm that they are securely connected.
3) Connect the center manifold hose of the mani-
fold gauge to the vacuum pump.
4) Operate the vacuum pump and open the low
pressure side and high pressure side valves. Next,
open the center manifold hose valve, and start the
vacuum pull.
(1) Vacuum pump
(2) Open
CAUTION:
Always use a vacuum pump when performing
the vacuum pull.
Refrigerant Charging Procedure
(2)
(3)
AC-00147
(2)
(1)
AC-00148
AC-21
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
5) Perform the vacuum pull for 5 minutes or more,
and when the low pressure gauge needle reaches
100.0 kPa (750 mmHg, 29.5 inHg) or above, close
the center manifold hose valve, and stop the vacu-
um pump.
6) Leave it for 5 to 10 minutes after closing the low
and high pressure valves, and inspect that there is
no change in the low pressure gauge needle. If
there is a change, this indicates a leak. Inspect and
repair the pipe and hose connections. After repair-
ing the problem, repeat again from step 1).
7) If there is no leak, continue vacuum pull for an
additional 20 to 30 minutes.
8) Close all valves and stop the vacuum pump.
9) Follow the can tap operation manual, attach to
the refrigerant can.
(1)
(2)
(1) Tap valve
(2) Center manifold hose
10) Disconnect the center manifold hose from the
vacuum pump, and connect the hose to the tap
valve.
11) When using a refrigerant collection container,
measure the amount of refrigerant with the mea-
surement unit and connect with the center manifold
hose.
(1) Refrigerant collection container
(2) Weight scale
12) Open the valve on the HFC-134a source.
AC-00214
(1)
(2)
AC-00215