| Charging systems which do not require a permit |
| Charging systems which do not require a permit are charging systems in which the pressurized gases are charged into mobile pressurized gas tanks which are exclusively used by the company itself. |
| Certain service equipment is charging systems which do not require a permit. When working with this equipment, the refrigerant is not charged into mobile pressurized gas tanks, but into a fixed charging cylinder with a visible level gauge and float switch. |
| When charging surplus refrigerant to cover own demand, it is advisable to use a portable charging cylinder with a visible level gauge and a pressure relief valve. |
| When charging pressurized gases into other pressurized gas tanks, observe the TRG 402 (Technical Regulations regarding Pressurized Gases). |
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