64 50 010Drawing off, evacuating and filling heating and air conditioning system (R134a)

Warning!

Only persons in possession of a professional certificate of competence for the maintenance and repair of heating and air conditioning systems are authorised to carry out repair work on the refrigerant circuit. It must be available no later than 04 July 2010 (applies only to EU countries; follow country-specific regulations in non-EU countries).

Refrigerant circuit is under high pressure!

  • If the protective caps on the filling valves are difficult to open, there is a danger of injury from leaking valve inserts.

Repair work may only be carried out on a depressurised refrigerant circuit!

  • Before conducting repairs, check the actual pressure drop on the pressure gauge of the A/C service station

Avoid contact with refrigerant and refrigerant oil.


Attention!

Risk of damage!

Only BMW-approved R134a refrigerant may be used. ( refer to sourcing reference: Operating Fluids)

Restart engine only when air conditioning has been correctly filled.


Vehicle-specific notes:

Only I01:

To access the connections for the refrigerant lines, remove front luggage compartment well.

Only I12:

Attention!

Risk of damage!

Risk of paint damage and scratches!

Open engine compartment lid to access the connections of the refrigerant lines!

Open and close the engine compartment lid as specified in the instructions without exception!


I01, I12 only:

To ensure virtually complete draining of the refrigerant circuit or the battery cooling system, carry out the following test module:

  • Body
  • Air conditioning function
  • Drain / fill the refrigerant circuit
  • Drain/fill the refrigerant circuit (I12, I01 without heat pump)
  • Drain/fill the refrigerant circuit of the heat pump (I01 with heat pump)

After filling the refrigerant circuit, delete the fault memory.

Attention!

Risk of damage!

Comply with SI 08 07 10 (669)!

Carefully move the climate service station!

Comply with the operating instructions and service interval for the A/C service station!

Make sure that the hoses of the A/C service station are drained after the drawing off or filling procedure!

The climate service station contains highly sensitive components, such as scales. These components will be damaged due to improper handling, such as fast driving over a bump. This will result in a significant reduction of the measuring accuracy when drawing off and filling.


Attention!

The vehicle must be parked on the floor during all drawing off, evacuation and filling procedures!

Filling a raised vehicle will result in insufficient filling levels.


Note:
Read and comply with notes on refrigerant (R134a, R1234yf) and refrigerant oil (Sanden SP-A2).
Note:

In the event of complaints, perform A/C performance test!

If the system fails the test, draw off, evacuate and fill the air conditioning in accordance with the operating instructions of the relevant service station.


Instructions for drawing off air conditioning:

 

To help separation of refrigerant and refrigerant oil, run engine at low speed (800-1200 rpm) and with air conditioning switched 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 A/C service station.

During drawing off, set the blower of the heating and air-conditioning unit to the middle blower speed. This ensures that drawing off is more effective since the pressure on the low pressure side increases.


Recycling:

Dispose of drawn-off refrigerant oil as hazardous waste.

Observe country-specific waste disposal regulations.

Instructions for evacuating off air conditioning:

 

Before each filling, evacuate the refrigerant circuit.

Observe an evacuation time of at least 30 minutes.

The evacuation procedure removes all traces of ambient air, water vapour and any other gases present from the heating and air conditioning system. This enables subsequent system filling with refrigerant.

If the vacuum does not remain stable when the system is off, run the procedure for leaks in the refrigerant circuit.

During evacuation, set the blower of the heating and air-conditioning unit to the middle blower speed. This ensures that evacuation is more effective since the pressure on the low pressure side increases.

 


Notes for filling heating and air conditioning system:

 

In certain cases, the refrigerant oil Sanden SP-A2 can be filled into the refrigerant circuit by injection.

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

Also top up any lost fluid as indicated in the table:

Loss of R134a refrigerant

Table 1 indicates the permitted loss of refrigerant after a specific period of time. There is no leak. refrigerant oil may not be topped up.

Table 2 indicates the amount of refrigerant oil must be topped up with an unapproved loss of refrigerant due to a leak after a specific period of time.

Different cases:

  1. Loss of refrigerant per Table 1 is not exceeded
    • Top up lost R134a refrigerant
    • It is not permitted to top up the refrigerant oil

       

  2. Loss of refrigerant per Table 1 is exceeded
    • Top up lost R134a refrigerant
    • refrigerant oil must be topped up additionally per Table 2

       

Table 1:

Number of years since last filling

0 - 1 1 - 2 2 - 3 3 - 4 4 - 5
Permissible loss [g] --> Do not top up refrigerant oil ≤ 30 ≤ 60 ≤ 90 ≤ 120 ≤ 150

 

Table 2:

Number of years since last filling

R134a loss of coolant [g] Top up quantity refrigerant oil
0 -1 < 120 0
120 - 150 10
> 150 20
1 - 2 < 180 0
180 - 210  10
> 210 20
2 - 3  < 240 0
240 - 270 10
> 270 20
3 - 4  < 300 0
300 - 330 10
> 330 20
4 - 5 < 360 10
> 360 20

 


Follow notes for opening and replacing parts in refrigerant circuit.

Depending on the type of component replaced on the heating and air conditioning system, it may be necessary to the top up the refrigerant oil, even if no measurable losses have occurred during drawing off. Follow the notes provided by the air conditioning manufacturer, taking account of the tolerances (and inaccuracies) indicated in the operating instructions of the relevant service station.

Information on the required refrigerant capacity of the air conditioning is found on the type plate (1).

If necessary, refer to the Technical Data for capacities.

Installation note:

Reseal refrigerant filler necks on vehicle with sealing caps.


Attention!

I01, I12:

In national-market versions with R134a with production date up to 08/2014 the type plate shows incorrect refrigerant oil.

Always use Sanden SP-A2

(Part number Sanden SP-A2: 2 339 920)


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