Residual engine heat utilization system, function - GF83.75-P-2000GI
MODEL 163 as of 1.9.01 with CODE (580a) Automatic air conditioning
Function
The residual engine heat utilization system allows the vehicle to be heated even when the ignition is switched OFF . To this end the system uses the residual heat of the engine. The residual engine heat is dissipated to the coolant and routed through the heat exchanger with the aid of the heating water circulation pump. The air drawn in by the blower motor is routed around the heat exchanger, whereby it is then warmed up. The heated air is then routed over the air outlets into the passenger compartment.
The residual engine heat utilization system can only be used when the ignition is switched OFF.
Once the Rest push-button
(
) on the AAC push-button control module (N22) has been pressed the following program sequence is run:
- Blending air flaps are automatically controlled
- Heating water circulation pump ON
- The blower's control voltage is limited to a maximum value of 5 Volt.
End of program
- Pressing the Rest push-button (
)
- Timeout of 30 minutes period (repeated operation possible)
- Protection against undervoltage at a battery voltage of less than 11 V (LED flashes)
- Ignition ON
During the residual engine heat utilization function no function keys are accepted apart from the Rest push-button (
) and the set point adjusters.
| Rest push-button, location/task/function | GF83.40-P-2148GI | ||
| Heating water circulation pump, location/task/ function | GF83.20-P-2109GI | ||
| Heating system heat exchanger, location/ purpose/function | GF83.20-P-2108GC | ||
| Blower motor, location/task/design/function | GF83.10-P-2170GI | ||
| Blending air flap actuator, location/task/function | GF83.57-P-2112GI |