Saab 900 Service Manual page 55

Heating and ventilatiQn system, air conditioning system 854-43
Connections for charging the system
Connections for charging
The connectors must only be screwed on finger
tight. Disconnect the negative (-) lead from the
battery.
Connect the red hose to the high-pressure side
of the compressor, marked Dis.
Connect the blue hose to the low-pressure side
of the compressor, marked Sue.
Open the valves on the compressor.
Start the vacuum pump and open the ballast
valve.
Check that the valves of the filling station are
closed.
Open valves, C, D and A, B.
Close the ballast valve after the pump has been
running for about one minute.
Let the pump continue running for a further ten
minutes.
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Saab 900