Evacuation and recharging (Air conditioning)

Evacuation and recharging

1. Renew the receiver/drier.
2. Connect a Refrigerant Station to the high and low pressure servicing connections.

CAUTION: Whenever the refrigerant system is opened, the receiver/drier must be renewed immediately before evacuating and recharging the system.

3. Operate the refrigerant evacuation system according to the manufactures instructions.

Note: If the vacuum reading is below 700mmHg after 15 minutes, suspect a leak in the system. Partially recharge the system and check for leaks using an electronic leak tester.

CAUTION: The system must be Evacuated immediately before recharging commences. Delay between Evacuation and Recharging is not permitted.

4. Operate the refrigerant recharging system according to the manufactures instructions.

Refrigerant to charge system is 0.71kg

5. If the full charge has not been accepted by the system, start the engine and run it at 1500 rev/min.
   Switch on the air conditioning system, open the car windows, set the temperature control to cold and switch the blower to maximum speed.
6. Consult Refrigerant Station Manual for correct procedure to complete the charge.
7. Carry out the air conditioning system performance test.

Air Conditioning System – Performance Test

WARNING: R134a is hazardous, refer to the GENERAL PRECAUTIONS given at the beginning of this section.

Carry out this test with bonnet and doors or windows open, air conditioning switched on, temperature control set to cold and blower at maximum speed. Set the air supply control to supply fresh air.

1. Close low pressure valve on refrigerant station.
2. Close high pressure valve on refrigerant station.
3. Connect a Refrigerant Station to the high and low pressure servicing connections.
4. Insert dry bulb thermometer into cold air outlet and position dry and wet bulb thermometer close to outside air inlet. Do not spill water from the wet thermometer (psychrometer).
5. Start engine and run it at 1500 rev/min for 10 minutes with air conditioning switched on.
6. Check that sight glass is free of bubbles.
7. Read both pressure gauges and thermometers.
   Check readings against table below with humidity between 60% and 80%. If readings are incorrect, refer to COMPLAINTS DURING TEST in Mechanical Fault Finding Manual.
8. Switch off air conditioning, stop engine, disconnect test equipment.

Performance range