| Classification of extraction systems |
WARNING | When working on the refrigerant circuit and handling refrigerant, observe the generally valid safety precautions and pressure vessel regulations. |
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| The air conditioner service and recycling units used in motor vehicle workshops are extraction and charging systems that do not require a permit (Group „3“) but which should only be operated by qualified personnel. Instructions for the operation and service of the devices may be found in the respective manufacturer's documentation. |
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| Extraction and charging systems of groups „1“ and „2“ are not used in motor vehicle workshops. |
| Group „3“ extraction and charging systems: |
| Mobile extraction and charging systems for filling compressed-gas vessels permanently connected to the system |
| The refrigerant or refrigerant/oil mixture is transferred to compressed-gas vessels which are permanently connected to the mobile systems. According to §3 Paragraph 5 No. 3 of the German pressure vessel regulations (different regulations may apply in other countries), compressed-gas vessels are classified as pressure vessels in this case. |
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| Do not require a permit. |
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| Do not require expert testing, as the gas is transferred to compressed-gas vessels which are classed as being pressure vessels (by contrast, a permit is required for the system for filling compressed-gas vessels from these pressure vessels for transfer to other parties and testing is mandatory). |
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