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... and Fascia Vent Flaps L Upper Mixing Flaps Heater Matrix Air Conditioning Evaporator SCT" Central Fascia Vent Flap —•»•-—555B55fc——w \ Air Inlet from Fans Lower Mixing Flaps Fan Motor and Mode Control Front Footwell Vent Electronic Switching Network Servo Passenger Compartment Vents Temperature Selection Control THE AIR CONDITIONING UNIT Although sophisticated in its operation, the entire system, with heating matrix, cooling matrix, servo control unit and mixing flaps, forms a single compact assembly housed in the scuttle behind the Facia. AIR BLENDING The main air inlet vent is located at the base of the windscreen. All air entering the car through this vent is ducted to the air conditioning and heater unit. All air entering the unit passes through the evaporator matrix where it is cooled and dehumidified. After leaving the evaporator, its direction is automatically controlled by the four blending flaps. Depending on the difference in the temperature of the interior and the temperature selected on the control dial, sensing thermistors automatically operate a servo motor which in turn operates a series of flaps and switches via a camshaft. These determine the heating or cooling effect of the system, providing either full cooling, maximum heating or a blend of heated and cooled air. When the selected temperature is attained, the control unit then maintains it automatically, regardless of ambient conditions. ...