Refrigerant Circuit, Charging Using Service Station

Refrigerant Circuit, Charging Using Service Station

- The work procedure is always to be performed as described in the operating instructions for the A/C service station.
- Before pouring in refrigerant, correct the quantity of refrigerant oil.
- The entire refrigerant charge can be added to either the high or low pressure side.

Charging refrigerant circuit
- Switch ignition off.
- Evacuate refrigerant circuit using service station => Refrigerant circuit, evacuating using service station.
- Screw out handwheel at quick-release coupling adapter (to close it).
- Allow refrigerant to flow into charging hose.
- Screw in handwheel at quick-release coupling adapter (do not strain valve) and charge with the specified quantity of refrigerant.
- Switch off service station.

NOTE: If the compressor has been removed, rotate it about 10 times by hand at ribbed belt pulley/freewheel prior to initial start-up to prevent damage caused by liquid impact when first switched on (any oil in compressor cylinder is forced out on rotation).

- Start engine with compressor switched off (version with A/C clutch).
- Set compressor to minimum output, i.e. "Econ" or A/C off mode (version with no A/C clutch with regulating valve).
- Wait until idle speed has stabilized.
- Switch on compressor and operate system for at least 2 minutes at idling speed.
- If necessary, check pressures in refrigerant circuit using service station.
- Turn engine off.
- Screw out handwheel on quick-release coupling adapter.
- Disconnect charging hoses from refrigerant circuit.
- Screw protective caps back on.