307
Thermo E+ 120/200/320
3 Assemblies and components
3.1.6 Nozzle block preheater
In case of very low temperatures fuel may exhibit severely
modified viscosity. Due to insufficient fuel atomization
functional heater malfunctions may occur.
Depending on the fuel used, these temperatures vary.
When used in cold regions or if fuels different from diesel
fuel are used, we recommend the use of a nozzle block
preheater.
The nozzle block preheater consists of a heating element
and a thermostat.
At a temperature below of 0°C the heating element heats
the nozzle holder and thus, fuel and atomizer nozzle. Fuel
viscosity is reduced and atomization improved.
The heating time depends on the temperature of intake air
and the heat reflection from the combustion space. Above
8°C the thermostat switches off.
The use of the nozzle block preheater is optional. The
retrofitting can be done without control device modifica-
tion.
ATTENTION:
There are two different heating elements. The wrong
use can lead to the failure of the heater, so please pay
attention for ident. no. and label at the wiring harness
of the nozzle block preheater:
- 11139457_ for devices with 12V, 12kW
- 11113972_ for all other variants
Fig. 307 Nozzle block preheater
Heating element
Thermostat, serrated
washer and nut
clip
Note
:
In the graphic above, the disc is shown transparently
and the fuel nozzle is omitted for clarity.
ATTENTION:
When connecting, danger of confusion with
the electronic ignition unit! See
Summary of Contents for Thermo E+ 120
Page 64: ...memos...
