Refrigerant Circuit, Discharging
Refrigerant is never to be allowed to escape into the atmosphere, but rather it is to be extracted from the refrigerant circuit using an extractor or A/C service station. The drained refrigerant will be locally recycled or is send to an environment-recycling place to the manufacturer (different or additional laws may apply in individual companies). For this reason, bring the vehicle to a workshop that has the necessary tools and in which the work can be performed by qualified personnel. .
Reason
If refrigerant R134a and refrigerant R1234yf is released into the environment, it enhances the greenhouse effect.
Refrigerant R1234yf has far less of a greenhouse effect than R134a refrigerant.
Refrigerant R134a and refrigerant R1234yf do not affect the ozone layer of the Earth's atmosphere (refrigerant R134a and refrigerant R1234yf do not contain chlorine atoms). Depletion of the ozone layer in the upper atmosphere is however only brought about by the splitting of carbon-chlorine bonds (as is the case, for example, with refrigerant R12).
The Global Warming Potential (GWP) of R1234yf is approximately 4, while the GWP of R134a is approximately 1400 (GWP of carbon dioxide = 1). Refer to .
After discharging the A/C system, disconnect the connector from the A/C Compressor Regulator Valve -N280- or from the refrigerant pressure sensor (A/C Pressure/Temperature Sensor -G395- / High Pressure Sensor -G65-).
Reason
The A/C Compressor Regulator Valve -N280- is no longer activated and the A/C compressor runs at idle. The A/C compressor is designed so that the A/C compressor components are guaranteed to be lubricated at idle by an internal oil circuit (as long as there is enough refrigerant oil in the A/C compressor).