Compressor HVAC: Service Precautions
WARNING: Filling of refrigerant from a 725 gram refrigerant bottle may only be carried out' via the service connection on the low-pressure side. The reason for this is that it is necessary to start the engine to be able to fill the system with the correct amount of refrigerant. If the refrigerant bottle is connected to the high-pressure side when the engine is started, there is a risk that the bottle might explode.