64 52... Instructions for opening and part replacement in refrigerant circuit
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Special tools required:
WARNING:
- Avoid contact with refrigerant and refrigerant oil
- Follow safety informations for handling refrigerant . See 64 50... NOTE FOR HANDLING R134A REFRIGERANT or 64 50... SAFETY INFORMATIONS FOR HANDLING TETRAFLUORETHANE REFRIGERANT R134A
- Follow safety information for HANDLING REFRIGERANT OIL
Attention!
- Always use new O-rings each time A/C connections are opened.
They must not be coated.
Use special tool 00 9 030 to install sealing rings without damaging them.
- Open the refrigerant circuit for as short of a period as possible.
- Close all components and lines in the refrigerant circuit and return parts immediately following the removals at openings with special tool 32 1 270 to prevent penetration of moisture or foreign objects.
- If the refrigerant circuit was closed at the openings with special tool 32 1 270 but it remains open for more than 24 h, the dryer insert for the air conditioning must be replaced.
- Part replacement as preliminary work fur further repair work and part replacement based on gradual leakage.
(minor leak, e.g. hairline crack)
Procedure:
- Draw off HEATING AND AIR CONDITIONING SYSTEM , then determine drawn-off amount of refrigerant oil
- Carry out part replacement
- Replace removed refrigerant oil and additionally top up with new refrigerant oil according to components replaced:
- Compressor: refer to NOTES ON COMPRESSOR REPLACEMENT
- Evaporator: 10 ml
- Capacitor: 20 ml
- Desiccant insert/dryer flask: 20 ml
- Each replaced refrigerant line: 10 ml
- Condenser with integrated dryer flask: 40 ml
- Safety pressure switch and gasket: no additional refrigerant oil
- Only I01: Radiator, high-voltage battery unit: 20 ml
- EVACUATE AND FILL AIR CONDITIONING SYSTEM
- Part replacement due to sudden leakage
(major leak, e.g. pipe break due to accident)
Procedure:
- Draw off HEATING AND AIR CONDITIONING SYSTEM , then determine drawn-off amount of refrigerant oil
- Carry out part replacement
- Replace removed refrigerant oil and additionally top up with new refrigerant oil according to components replaced:
- Compressor: refer to NOTES ON COMPRESSOR REPLACEMENT
- Evaporator: 35 ml
- Capacitor: 35 ml
- Desiccant insert/dryer flask: 55 ml
- Each replaced refrigerant line: 35 ml
- Condenser with integrated dryer flask: 55 ml
- Safety pressure switch and gasket: no additional refrigerant oil
- Only I01: Radiator, high-voltage battery unit: 35 ml
- EVACUATE AND FILL A/C SYSTEM