Warning Notes For Handling Refrigerant
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 circuit must be flushed with refrigerant if:
- There is dirt or other impurities in the refrigerant circuit.
- When evacuating a leak-tight refrigerant circuit, the vacuum gauge does not maintain a constant vacuum (there is moisture in the refrigerant circuit and this builds up pressure).
- The refrigerant circuit was open for longer than the normal assembly time (e.g. after an accident).
- Pressure and temperature measurements in the refrigerant circuit indicate that there is moisture in the refrigerant circuit.
- The air-conditioning compressor had to be replaced due to internal damage (e.g. noises or not working).
- A different air-conditioning compressor with different refrigerant oil has to be installed.
- There are granules in the refrigerant circuit due to a faulty desiccator.
The refrigerant circuit must not be flushed with refrigerant if:
- There is contaminated refrigerant in the refrigerant circuit. We recommend that you replace all components.
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
- The filter in the flushing device for refrigerant circuits must be changed after 5 to 10 flushing cycles (flushed vehicles), depending on the type and extent of contamination of the flushed refrigerant circuits. If a highly contaminated refrigerant circuit is flushed (the refrigerant machine oil from the refrigerant circuit is black and viscous or there are a lot of chips in the refrigerant circuit), the filter must be changed after flushing this refrigerant circuit. If a refrigerant circuit is highly contaminated like this, it is also a good idea to flush the refrigerant circuit again after changing the filter.
Information
- The refrigerant circuit is cleaned in direction of flow.
- The air-conditioning servicing equipment is connected to the charging valves for cleaning the refrigerant circuit.