Warning Notes For Handling Refrigerant
WARNING: This page is about a different variant/trim than selected.
WARNING:
Refrigerant
- Danger of freezing
→ Avoid contact with refrigerant.
→ Wear personal protective gear.
→ Observe the safety regulations for working on air-conditioned vehicles and handling refrigerant.
→ Observe the safety regulations for extraction and filling systems.
→ Observe the instructions for repairing air-conditioning systems and storing spare parts.
Information
- The refrigerant R1234yf with refrigerant oil ND12 is used for the model year 2017 Cayenne.
- Only the refrigerant oil ND12 can be used for the refrigerant R1234yf.
- The refrigerant R134a is also available for certain markets and only the refrigerant oil ND8 can be used for this as well.
- The allocation of refrigerant to the vehicle is controlled using the additional equipment number (M-number) and the allocation of refrigerant and the refrigerant quantity can also be found on the sticker in the engine compartment.
- Read the relevant safety data sheet for handling refrigerant R134a and R1234yf.
Information
- For all work on the air-conditioning system that necessitates opening the refrigerant system, the system contents must first be disposed of in accordance with regulations.
- Dirt and moisture must be kept out of the air-conditioning system pipes and hoses.
- Cleanliness must be ensured during all work.
- System components must never be cleaned on the inside with hot steam.
- Only use nitrogen for cleaning.
- When replacing a component, all openings must be closed off using suitable stoppers immediately after opening the system.
Information
- Instructions in the operating instructions for the air-conditioning servicing equipment take precedence. The procedure described here may differ from the description provided by the respective air-conditioning servicing equipment manufacturer.
Information
- If a flushed refrigerant circuit will not be assembled again immediately after flushing, leave the adapters on the connections and close off the connections on the adapters using > VAS 6338/30A - sealing caps .
Information
The electric air-conditioning compressor must be cleaned in the following situations:
- If different refrigerant oil must be used.
- Following an accident resulting in damage to air conditioning components
- Refrigerant circuit has been open for an indefinite period of time and is not closed off properly.
- In order to determine the refrigerant oil quantity.
Information
- The refrigerant oil in the electric air-conditioning compressor must be removed by flushing in direction of flow (from intake on low-pressure side to outlet on high-pressure side). It is not possible to flush against the direction of flow due to the installed valves.
- In order to flush the air-conditioning compressor, it must be positioned so that the connection for the refrigerant line on the high-pressure side is as low as possible.
- If air-conditioning servicing equipment without programming is used for flushing, the procedure must be performed manually (evacuate, flush 4 times using at least 2 kg of refrigerant each time and extract the refrigerant again, evacuate).
- Basic circuit diagram (flushing circuit) for cleaning with refrigerant
Basic circuit diagram (flushing circuit) for cleaning the electric air-conditioning compressor
1 Air-conditioning servicing equipment (with flushing device) 2 High-pressure hose on air-conditioning servicing equipment 3 Adapter for connection for the low-pressure side on the air-conditioning compressor 4 Refrigerant line 5 Electric air-conditioning compressor 6 Refrigerant line 7 Adapter for connection for the high-pressure side on the air-conditioning compressor 8 Hose on flushing device 9 Flushing device for refrigerant circuit 10 Low-pressure hose on air-conditioning servicing equipment - Secure adapters -7- VAS 6338/40 to the high-pressure side (small diameter) and -3- VAS 6338/41 to the low-pressure side (large diameter) using the screws used to secure the refrigerant line to the electric air-conditioning compressor -5- . Use the same tightening torque as for securing refrigerant lines to air-conditioning compressor.
- Connect high-pressure hose -2-
of the air-conditioning servicing equipment (generally red) to the adapter -3-
on the electric air-conditioning compressor.
- 3.1 To do this, the quick connector on the high-pressure line of the air-conditioning servicing equipment must be removed.
- Connect low-pressure hose -10- of the air-conditioning servicing equipment (generally blue) to the outlet of the flushing device (chip filter) -9- for refrigerant circuits using the quick connector.
- Connect hose on the flushing device -8- of the air-conditioning servicing equipment to the adapter -7- on the electric air-conditioning compressor.
- Clean the refrigerant circuit as described in the operating instructions for the air-conditioning servicing equipment.
- After flushing, check the pressure in the refrigerant circuit. There must be no overpressure in the refrigerant circuit (evacuate the refrigerant circuit again briefly if necessary).
- Take into account the amount of refrigerant oil extracted from the electric air-conditioning compressor when filling the refrigerant circuit.