IHKA E36 Housing Assembly
The IHKA housing assembly, shown below, is very similar in construction and layout to the IHKR (earlier system) E36 housing assembly.
NOTE:
The E36 final stage unit fits into the lower left side of the housing.
And, the temperature mixing flap is manually operated using a thumbwheel and cable arrangement - there is no stepper motor on the housing assembly.
Like IHKA E38, IHKA E36 uses an M-Bus to control all stepper motors except the fresh air flaps stepper motor. IHKA E36, however, uses only five stepper motors:
- Fresh air flaps (conventional)
- Recirculating air flaps (smart)
- Defroster flaps (smart)
- Face vent flaps (smart)
- Footwell flaps (smart)
The fresh air flaps stepper motor is connected to the control panel/module by four circuits. The "smart" stepper motors are all linked together and receive their positioning commands over the M-bus.