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Opel Frontera UE. Manual - part 1240
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A–81
7. Evacuate and recharge with the proper amount of
refrigerant.
8. Perform the oil return operation.
9. Remove the compressor and recheck the amount of
oil.
10. Adjust the compressor oil, if necessary.
Checking and Adjusting for
Compressor Replacement
150 cc (5.0 fl.oz.) of oil is charged in compressor
(service parts). So it is necessary to drain the proper
amount of oil from the new compressor.
1. Perform oil return operation.
2. Discharge and recover the refrigerant and remove
the compressor.
3. Drain the compressor oil and measure the extracted
oil.
4. Check the compressor oil for contamination.
5. Adjust the oil level as required.
6. Evacuate, charge and perform the oil return
operation.
7. Check the system operation.
Contamination of Compressor Oil
Unlike engine oil, no cleaning agent is added to the
compressor oil. Even if the compressor runs for a long
period of time (approximately one season), the oil never
becomes contaminated as long as there is nothing
wrong with the compressor or its method of use.
Inspect the extracted oil for any of the following
conditions:
• The capacity of the oil has increased.
• The oil has changed to red.
• Foreign substances, metal powder, etc., are present
in the oil.
If any of these conditions exists, the compressor oil
is contaminated. Whenever contaminated
compressor oil is discovered, the receiver/drier
must be replaced.
Oil Return Operation
There is close affinity between the oil and the
refrigerant. During normal operation, part of the oil
recirculates with the refrigerant in the system. When
checking the amount of oil in the system, or replacing
any component of the system, the compressor must be
run in advance for oil return operation. The procedure is
as follows:
1. Open all the doors and the engine hood.
2. Start the engine and air conditioning switch to “ON"
and set the fan control knob at its highest position.
3. Run the compressor for more than 20 minutes
between 800 and 1,000 rpm in order to operate the
system.
4. Stop the engine.
Replacement of Component Parts
When replacing the system component parts, supply
the following amount of oil to the component parts to be
installed.
(Collected Amount)
(Charging Amount)
more than 90 cc (3.0 fl.oz) same as collected
amount
less than 90 cc (3.0 fl.oz)
90 cc (3.0 fl.oz)
(Amount of oil drained
from used compressor)
(Draining amount of oil
from new compressor)
less than 90 cc (3.0 fl.oz)
Same as drained amount
more than 90 cc (3.0 fl.oz) 90 cc (3.0 fl.oz)
(Component parts to be
installed)
(Amount of Oil)
Evaporator
50 cc (1.7 fl. oz.)
Condenser
30 cc (1.0 fl. oz.)
Receiver/dryer
30 cc (1.0 fl. oz.)
Refrigerant line (one
piece)
10 cc (0.3 fl. oz.)