A/C Service Station, Draining
If it is necessary to drain the A/C service station (for example, due to extraction of contaminated refrigerant), all filters and dryers must always be replaced (do not remove filter and dryer from the air-tight packaging until immediately before installation to minimize moisture absorption).
Refrigerant cylinders filled with contaminated, used refrigerant are referred to as "Recycling cylinders".
Always evacuate the recycling cylinders prior to initially filling with refrigerant (if there is air in a refrigerant cylinders, they must not be filled with refrigerant).
Different types of refrigerant may not be mixed together (refrigerant mixtures cannot be recycled and must be disposed of). If there is any doubt about the composition of the cylinder contents, the refrigerant recycling company is to be informed accordingly.
- When filling recycling canisters (compressed-gas canisters), observe the existing regulations, technical rules and laws.
- Recycling cylinders are never to be overfilled. Overfilled recycling cylinders do not have a sufficient gas cushion to accommodate the liquid expansion caused by the effects of heat. There is a danger of rupture.
- To ensure safety, only use of recycling cylinders fitted with a safety valve.
- Recycling cylinders must be weighed on calibrated scales during the filling process. The maximum permissible capacity is 75 % (charge factor 0.75) of the charge weight indicated on the recycling cylinder (the possibility of refrigerant oil entering the recycling cylinder along with the refrigerant cannot be ruled out).