IHKR Control Unit

IHKR Control Unit

- Integrated control module with operating panel.







- IHKR heater/air conditioner unit with
- 1 heat exchanger temperature sensor
- 1 evaporator temperature sensor
- 1 footwell temperature sensor
- Blower motor
- 1 stepper motor (high speed fresh/recirc air)







IHKR Operation







IHKR system operation is as follows:

- Temperature Control - The desired interior temperature is set with the rotary knob on the control panel. Control of the interior temperature is carried out electronically by the control module's cycling of the water valve to regulate coolant flow through the heat exchanger.

- Air Distribution - Air distribution is set mechanically through the use of gear linkages and bowden cables. The air can be set for:
- Footwell or blended between footwell/face vent or footwell and defrost
- Defrost or blended between footwell/defrost or defrost/face vent
- Face vent or blended between face vent/footwell or face vent/defrost

- Blower Control - Blower fan speed is controlled through a final stage with infinitely variable speed control.

The push buttons on the control panel are used to:

- Switch between fresh air and recirculating air inlet modes

- Request for A/C activation

- Activation of the rear window defogger