Refrigerant, Transferring To A/C Service Station Storage Canister (Charging Cylinder Or Storage Cylinder)

WARNING: This page is about a different car, the 2023 Audi S3, 2023 Audi RS 3, 2023 Audi A3 Quattro, and 2023 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

The work procedure is always to be performed as described in the operating instructions for the A/C service station.
A certain amount of refrigerant is specified for charging for each A/C system. To ensure that neither too much nor too little refrigerant is added (either would impair the cooling output), the charging cylinder has a scale indicating the weight.
The volume of a refrigerant changes as a function of pressure. The scale must therefore be set according to the pressure in the charging cylinder.

NOTE:

Do not completely empty the storage canister (charging cylinder or storage cylinder) as the liquid column boundary layer cannot be traced in the tube during filling (outside of the visible range).

WARNING:

Do not overfill. A completely filled storage canister (charging cylinder or storage cylinder) will burst when the temperature rises.