Technical data

Air Top 2000 ST General description
203
2.6 Glow plug
The mixture of fuel and air is ignited by the glow plug when
the heater is started. The glow plug takes the form of an
electrical resistor and is positioned in the burner insert on
the side away from the flame.
Fig. 208 Glow plug
2.7 Overheating sensor
The overheating sensor measures the temperatures in the
rib area of the heat exchanger whenever the heater is
operating. The control unit evaluates the signal and protects
the heater from hot air outlet temperatures above 150 °C
and surface temperatures above 80 °C by shutting down
the combustion process and blowing cold air over the
heater.
The heater then suffers a fault lock-out and can by restarted
by being switched off and on again (see 3.2).
Fig. 209 Overheating sensor
2.8 Metering pump
The metering pump is a combined transport, metering and
shut-off system for supplying fuel from the vehicle’s tank to
the heater.
Fig. 210 Metering pump DP2 / DP 30.2