Operation

Operation

The control unit controls the heater engagement maintenance and switching off conditions

The heater unit engagement conditions are

• engine started for at least 60 seconds
• engine speed above 700 rpm
• battery voltage above 12V (positive electrical balance)
• engine coolant temperature above – 40 C
• outside temperature below around 10 C

The engagement maintenance conditions are

The operation of the heater according to the temperature of the engine coolant

The heater unit disengagement conditions are

Coolant temperature above 80

The air/fuel mixture is ignited by the heater plugs (1a) Combustion takes place using the air coming from the fan (2) and the fuel coming from the metering pump

The heat produced in the combustion chamber (4) is given off to the engine coolant (5) which comes into contact with it The exhaust gases (6) produced by the combustion are discharged via a special exhaust pipe

Component key

1. Heater plug
2. Air fan
3. Fuel pipe
4. Combustion chamber
5. Engine coolant
6. Exhaust gases
7. Intake air
8. Engine coolant inlet
9. Engine coolant outlet
10. Burner
11. Electronic control unit
12. Engine coolant temperature sensor
13. Heat exchanger