Electronic Switchgear For Temperature and Blower Control

ELECTRONIC SWITCHGEAR FOR TEMPERATURE AND BLOWER CONTROL WITH ELECTRIC WIRING DIAGRAM

The signals of the in-car temperature sensor, the temperature sensor for heat exchanger and the nominal value potentiometer (temperature dial) are processed in electronic switchgear for temperature control.

Switchgear (9) for temperature control regulates according to requirements:
a) flow through heat exchanger via monovalve,
b) change of mode, that is, switching from "cooling" to "heating" and vice versa, during which in accordance with interminent in-car temperature conditions, tempered air may simultaneously come out of footwell nozzles as well as out of center nozzles (overlap).
c) position of fresh air - recirculating air flap,
d) control of blower stages via preresistance group (1) by means of switchgear for blower control.






Layout electronic switchgear for blower control, vacuum elements for fresh air-recirculated air flap and main air flap
19 Electronic switchgear for blower control
38 Vacuum element defroster nozzle flaps
40 Vacuum element center nozzle flap
42 Vacuum element for fresh air-recirculated air flap and main air flap
43 Vacuum element for fresh air-recirculated air flap and main air flap






Layout preresistance group for blower under brake booster in unit compartment
1 Preresistance group
24 Preresistance additional fan (on vehicles with 8-cylinder engines only)






Layout electronic switchgear for temperature control
9 Electronic switchgear
12 Blower motor
47 Air jet