DBW 2010 / 2016 2 General Description
205
2.1 Combustion air fan
The combustion air fan transports the air required for com-
bustion out of the combustion air inlet into the combustion
chamber.
The following fan models are installed in the heaters:
DBW 2010 / 2016 – radial fan.
2.2 Motor
The motor drives the combustion air fan via a coupling and
the fuel pump via a gearbox.
2.3 Fuel pump
The fuel supply is provided with the fuel pump. The pump is
driven by the motor of the combustion air fan via a coupling.
The fuel is compressed in the fuel pump and is atomised via
the high-pressure nozzle. A solenoid valve controls the fuel
supply to the nozzle.
2.3.1 Nozzle holder pre-heating unit
The fuel to the atomiser nozzle is heated with the nozzle
holder pre-heating unit.
At extremely low temperatures, malfunctions can occur with-
out nozzle holder pre-heating.
At a temperature of < 0 °C, the heating cartridge in the noz-
zle holder is connected with a thermostat. The heating dura-
tion is dependent on the reflected heat in the combustion
chamber and switches off at +8 °C at the thermostat.
If no nozzle holder pre-heating unit is installed in the heater,
it can be retrofitted.
See the spare parts list for the required parts.
Fig. 204 Combustion air fan
Fig. 205 Motor
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