Heating system — general information

Fresh air is sucked in through the intake grille of the fine filter housing, located under the windshield, and is supplied by the fan to the vehicle interior. In this case, the air passes through the heater housing and is directed to the respective air nozzles by means of various valves controlled by Bowden cables. If the heating system is on (warm), the cold air is directed through the heat exchanger. The heat exchanger is located in the heater housing and is heated by the hot liquid of the engine cooling system. The flowing air is heated by the hot plastic heat exchanger and then fed into the interior of the vehicle. The heating efficiency is controlled by the liquid side. This means that the temperature is determined by the fluid flow through the heat exchanger. The flow, in turn, is regulated by two solenoid valves built into the coolant circulation system.

The air temperature for the left and right sides of the passenger compartment can be set using the rotary controls. In accordance with the position of the regulators and the temperature in the passenger compartment, the electronic unit located in the control unit of the heating system regulates the opening time of the heating valves. The interior air temperature sensors are located on the rear side of the heater housing. Thanks to electronic control, the temperature in the passenger compartment is kept almost constant, regardless of the speed of the vehicle and the ambient temperature.

To increase the productivity of the heating system, a fan built into the heater with stepless speed control is used.