MAX DEF function switch

MAX DEF function switch

A special switch activates the MAX DEF function: it is located on the distribution knob: it is an N.A. contact which is closed with the knob completely turned in a clockwise direction.

Mixture electrical actuator

The adjustment of the temperature of the treated air is carried out through the actuator which mixes the hot air and the cold air acting on the flap which either does or does not send the flow of air entering the heater radiator, through which the hot water coming from the engine passes through.

A motor with a 12 V supply controls the rotary movement of a drive pin which acts directly on the mixture flap. A potentiometer detects the actual positionand acts as "feedback" to the control unit.

Total rotation angle between max. hot and max. cold = 62°
Ratio u/U for max. hot = 0.707
Ratio u/U for max. cold = 0,26

Electrical recirculation actuator

The outside air intake flap is rotated by means of the recirculation actuator which acts on the flap itself moving from position (A) "dynamic air" to position (B) "recirculation". There are NO intermediate positions.

A motor with a 12 V supply controls the rotary movement of a drive pin which acts directly on the flap. Reversing the polarity results in a movement in the opposite direction.