Housing Assembly HVAC: Description and Operation

Air Conditioning Unit

Temperature Distribution System
The heating and ventilation unit case consists of three sections, the rear of which contains the air conditioning system evaporator. The front section, which consists of two parts, contains the heater matrix and rotary flaps. The lower outlets which direct air to footwell and rear passenger compartment, are removable.

Temperature variation within the car is achieved by incoming air passing through, or bypassing the evaporator and heater matrix.

NOTE: Solid arrow = Hot, Line arrow = Cold





- Full heating position.





- Defrost position.





- Full cooling position.





- Blend position.
^ The rotary flaps are opened or closed by servo motors as directed by the control system.
^ Flap position information is relayed to the A/CCM by feedback potentiometers.