Fig. 204 Heat Exchanger; Fig. 205 Burner With Combustion Chamber; Fig. 206 Control Unit; Fig. 207 Flame Monitor - Webasto Air Top 2000 STC Workshop Manual

Air Top 2000 STC
2.2 Heat exchanger
In the heat exchanger, the heat generated by the combustion
process is transferred to the air delivered by the heating air
fan.

Fig. 204 Heat exchanger

2.3 Burner with combustion chamber
In the burner, the fuel is distributed over the metal fibre
evaporator (mesh) in the combustion chamber. The fuel/air
mixture burns in the combustion chamber, thus heating the
heat exchanger.
Burner

Fig. 205 Burner with combustion chamber

2.4
The control unit is the central component for ensuring
trouble-free operation. It monitors the components,
evaluates the sensor signals and controls heating operation.
Wiring
harness
2.5
The flame monitor is a low-impedance PTC resistor which
changes its resistance as a function of the heat emitted by the
flame.
This change in resistance is evaluated by the control unit so
that the flame status is monitored throughout the heating
operation.
Combustion
chamber
2 General description
Control unit

Fig. 206 Control unit

Flame monitor (petrol heater only)

Fig. 207 Flame monitor

Internal
room temperature
sensor
Component plug
202