64 50 009 Drawing off, evacuating and filling A/C system (R-134a)

WARNING: Avoid contact with refrigerant and refrigerant oil.

Follow safety instructions for handling refrigerant R-134a.

Follow safety instructions for handling refrigerant oil.

IMPORTANT: Risk of damage! Restart engine only when A/C system has been correctly filled.

NOTE: Draw off, evacuate and fill the A/C system in accordance with the operating instructions of the relevant service station.

E60 only:

If necessary, to connect service station, use manufacturer's adapter for high-pressure connection (red).

Instructions For Drawing Off A/C System:

To help separation of refrigerant and refrigerant oil, run engine at low speed (800-1200 RPM) and with A/C system turned on for a few minutes.

The limits the entrainment of refrigerant oil while it is drawn off.

Drawn-off refrigerant oil must be changed and reintroduced via the service station.

If at the end of the drawing-off procedure the service station moisture indicator shows that the drawn-off refrigerant is excessively moist, clean the refrigerant in accordance with the service station operating instructions.

Recycling:

Dispose of drawn-off refrigerant oil as hazardous waste.

Observe country-specific waste-disposal regulations.

Instructions For Evacuating Off A/C System:

The evacuation procedure removes all traces of ambient air, water vapor and any other gases present from the A/C system. This enables subsequent system filling with refrigerant.

A decrease in the vacuum level indicates a leak in the refrigerant circuit.

Instructions For Filling A/C System:

Before filling with refrigerant, top up the refrigerant oil entrained during drawing off.

Depending on the type of component replaced on the A/C system, it may be necessary to top up the refrigerant oil, even if no measurable losses have occurred during drawing off. Read and comply with the A/C system manufacturer's notes in this regard and the operating instructions of the relevant service station.

Information on the required refrigerant fill quantity for the entire A/C system is contained on the rating plate (1) in the engine compartment.

If necessary, refer to HEATING AND AIR CONDITIONING - TECHNICAL DATA for fill quantities.

Fig 1: A/C System Filling Instructions

Installation:

Reseal refrigerant filler necks on vehicle with sealing caps.