| Charging systems that do not require a permit |
WARNING | When working on the refrigerant circuit and handling refrigerant, observe the generally valid safety precautions and pressure vessel regulations. |
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| Charging systems not requiring a permit are ones used for transferring compressed gases to mobile compressed-gas vessels for internal use only. |
| Some air conditioner service units are charging systems not requiring a permit. When working with such equipment, the refrigerant is not transferred to mobile compressed-gas vessels, but rather into a permanently installed charging cylinder with visible level gauge and float switch. |
| It is advisable to use a portable cylinder with visible level gauge and high-pressure safety valve for surplus refrigerant for internal use. |
| TRG 402 (technical regulations for compressed gases) must be observed when filling other compressed-gas vessels with compressed gases. |
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