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New service devices with filler adapters as well as new leak detectors will be necessary.
The system cannot be filled with the R134a service devices.
Refrigerant
The refrigerant is carbon dioxide (R744) and can be disposed of directly into the ambient
air in well ventilated rooms.
Legal Situation
The current legal situation in Europe stipulates changeover to the R744 as from 2011 for
new vehicle types and as from 2017 for all new vehicles. The introduction at BMW will
therefore take place slowly and in stages.
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Future Technology
R744 Refrigerant Circuit
Index Explanation Index Explanation
1 Expansion Element 7 Internal Heat Exchanger
2 Evaporator 8 Service Port, High Pressure
3 Service Port, Low Pressure 9 Gas Cooler
4 Combined Component 10 Sensor
5 Rupture Plate, Low Pressure 11 Compressor with High Pressure Rupture Plate
6 Accumulator
The refrigerant circuit is subdivided into three areas corresponding to temperature:
" The low-pressure area (ND) is blue.
" The high-pressure area (HD) is red and orange.
" The red area is the hot gas zone of the system with refrigerant
temperatures up to 165C (short-term max. 180C).
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Future Technology
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