Technical data

DBW 2010 / 2012 / 2020 / 2022 / 300 / 350 9.The Repair
903
9.1.2.1 The installation of the pre-heating element
of the nozzle block in the DBW 2010 / 2012 / 2020 /
300 / 350 heating devices equipped with the control
device 1553
General
The fuel going to the vaporizer nozzle will be heated
with the pre-heating of the nozzle block. Defects can
occur at the heating devices indicated above at
excessively low temperatures if there is no pre-heating
of the nozzle block.
The heating cartridge in the nozzle block will be
activated over the thermostat when the temperature is
< 0
0
C. The period of heating depends on the reflecting
radiation heat in the combustion chamber and the
thermostat will be shut off when the temperature is +8
0
C.
In the case that there is no pre-heating of the nozzle
block, it can be mounted subsequently as described
below.
The following spare part sets are available to equip the
heating devices mentioned above:
• 12 V heating devices equipped with the control
device 1553, order number 968 89A.
• 24 V heating device equipped with the control
device 1553, order number 989 71A.
The spare part set consists of the following parts:
1 Heating cartridge
1 Attachment wire
1 Relay
1 Thermostat
1 Cable bunch
1 Catch
1 Disc
1 Nut
1 Knurled washer
1 Socket bushing, with 4 pins
1 Socket bushing, with 2 pins
4 Flat socket bushings
Heating cartridge
Nozzle block
Thermostat
Heating cartridge
Nozzle block
Thermostat