Webasto Product N.A., Inc. 16 www.techwebasto.com
GENERAL DESCRIPTION DBW 2010/2020/300 COOLANT HEATERS
2.1.12 FUEL NOZZLE AND NOZZLE HOLDER (14)
The fuel atomizing nozzle is screwed into the nozzle
holder. Under pressure, the fuel nozzle atomizes the fuel
entering the combustion chamber.
Figure 12: Nozzle Holder and Nozzle
2.1.13 FUEL LINE CONNECTIONS (25)
Fuel lines from the fuel tank are connected to the suction
and return pipes of the heater in the case of the DBW
2010/2020/300.
The Scholastic Series heater use a single fuel line that is
connected to the suction pipe of the heater. There is no
return fuel line on this model.
Figure 13: Fuel Pumps
2.1.14 ELECTRONIC IGNITION UNIT (3)
The electronic ignition unit develops high voltage of
approximately 8000 volts to produce a spark at the tips
of the ignition electrodes. The electronic ignition unit is
only in operation during the starting phase.
IMPORTANT! Never switch on the electronic
ignition unit without being connected to the
ignition electrodes!
Figure 14: Electronic Ignition Unit
2.1.15 IGNITION ELECTRODES (13)
The ignition spark is formed between the points of the
ignition electrodes, thus starting the combustion process.
Figure 15: Ignition Electrodes and Setting Gauge
Nozzle
Nozzle Holder
Dual Line System
(DBW 2010/2020/300)
Single Line System
(Scholastic Heater)
+ Black Wire
– Brown Wire
Setting Gauge
Electrodes
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