The heater radiator is combined with the engine cooling system by two hoses passing in the engine compartment and placed in the plastic casing of the climate unit, installed under the central part of the instrument panel.
Pic. 12.1. Schematic diagram of the movement of air flows in the ventilation, heating and air conditioning system: 1 - windshield air deflectors; 2 - dampers for the distribution of air flows to the windshield deflectors and instrument panel deflectors; 3 - instrument panel deflectors; 4 - air ducts for heating the foot area of the driver and passengers; 5 - damper for distributing air flows to the instrument panel deflectors and air ducts for heating the driver's and passengers' footwells; 6 - heater radiator; 7 - cabin air filter; 8 - damper of the air recirculation system; 9 - air intake box; 10 - air intake in the passenger compartment; 11 - fan impeller; 12 - fan motor; 13 - air conditioner evaporator; 14 - drainage hole for draining condensate; 15 - damper of the temperature controller; 16 - housing block of the heating and air conditioning system
The main components of the heater (pic. 12.1):
- heat exchanger (radiator) 6 heater, designed to heat the air entering the passenger compartment with the heat of the engine cooling liquid;
- fan (blower) 11. The permanent magnet fan motor 12 provides a controlled supply of outside air to the heater and air conditioning dampers. To obtain different values of the fan speed, a block of additional resistors is installed in the power supply circuit of the electric motor;
- air temperature controller damper 15 coming from the heater to the passenger compartment. The amount of air passing through the heat exchanger of the heater and the amount of outside air passing through the heat exchanger depends on the change in its position;
- air distribution flaps 2 coming from the heater through the air ducts to the passenger compartment or for blowing the windshield.
