Extraction System Group Classifications
When performing work on the refrigerant circuit and when handling refrigerant, observe all general safety precautions and pressure canister regulations.
The A/C service and recycling units used in motor vehicle workshops are extraction and charging systems not requiring a permit (Group "3") but which are only to be operated by qualified personnel. Instructions for unit operation and maintenance can be found in the relevant manufacturer's documentation.
Extraction and charging systems of groups "1" and "2" are not used in motor vehicle workshops.
Extraction and Charging Systems of Group "3" :
Mobile extraction and charging systems for charging compressed-gas canisters permanently connected to the system.
The refrigerant or refrigerant/oil mixture is transferred to compressed-gas canisters which are permanently connected to the mobile systems. In accordance with 3 Para. 5 No. 3 of pressure canister regulations, compressed-gas canisters are classified as pressure canisters in this case.
The charging systems require:
-- No permit
-- No expert testing as the gas is transferred to a compressed-gas canister, which is classified as a pressure canister. (Systems used for transfer from these pressure canisters to compressed-gas canisters for supplying to third parties do however require a permit and are subject to mandatory testing).