General description

GENERAL DESCRIPTION

Climate control through the heater is controlled by three knobs of the control unit located on the panel: these controls act on the heater- distributor -air flow unit as follows:

• the left-hand knob (1) mechanically operates the mixing port for hot (red) and cold (blue) air; when it is turned completely counter-clockwise it shuts off the heater closing a special tap.

  NOTE: the heater comprises a heat exchanger which exploits the engine coolant to give off heat to the air sent to the passenger compartment: in fact it is supplied by a special pipe of the engine cooling circuit.

• the centre knob (2) - mechanically operates a flexible transmission - firstly for opening the flaps that adjust the flow of air;
• 0: inlet of outside air without fan (dynamic air)
• from 1 to 4: a switch is controlled which turns on the fan through a four-speed regulator. The regulator and its resistor are fitted on the duct near the fan.

  NOTE: the fan can only be turned on with ignition key engaged.

• the right-hand knob (3) adjusts the distribution of the flow acting, still by a mechanical transmission, on the distribution ports, sending air into the passenger compartment in the directions shown schematically on the ideograms.
• the recirculation function (4), is engaged through the lever (4) which operates a special port. This acts by closing the outside air duct and simultaneously opening the one for recirculating air from inside the passenger compartment (lever (4) completely to the right).

  The recirculation function makes it possible to withdraw the air to be treated from inside the passenger compartment, shutting off the flow of outside air which under certain circumstances might be unwanted: bad smells, smoke, unventilated tunnels, etc.

  NOTE: If the lever (4) is left in an intermediate position it may adversely affect operation of the system.