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87
929
Evacuating
the air-conditioning
sys-
tem
1. Syphon off any existing pressure,
2. Switch on the vacuum pump (turn the main
switch to the left).
3. Open the shut-off valves for low pressure
(4) high pressure (5). torrmeter (6) and
vacuum pump (7).
4. Leave the vacuum pump switched on for at
least 15 min.
5. Close shut-off valves 6 and 7 at a pressure
of approx. 0.1 bar (absolute)
6. Switch off the vacuum pump.
Note
If the vacuum cannot be reached or can be
reached only after a very long time or if the
pressure increases to over 0.2 bar (absolute)
approx. 10 minutes after switching off the
pump, the circuit possesses a leak and must
be sealed.
Flushing
the air-conditioning
system
Note
Flushing the air-conditioning
system serves
the purpose of drying the circuit.
1. Evacuate
2. Open the shut-off valves for high pressure
(5) and the refrigerant outlet (11).
3. Allow refrigerant to flow in until a pressure of
approx. 2 bar (absolute) is indicated.
4. Close shut-off valves 5 and 11.
5. Shut-off refrigerant again
6. Evacuate
87- 16d
Installation
work on the air-conditioning
system
Printed in Germanv - XXN, 1989
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