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8 | Fuel Supply
8.5
Fuel Filter
If there is a possibility of using dirty or contaminated
fuel, a Webasto fuel filter should be installed. Ver-
tical positioning is preferred where possible, how-
ever horizontal is also acceptable. Note the installa-
tion position and direction of flow.
Fig. 22: DP42 Metering Pump Orientation
Fig. 21: Fuel filter Orientation
8.6
Fuel Metering Pump
The fuel metering pump is a combined pumping,
metering and shut-off system. This dry-primeable
solenoid-style piston pump pumps the fuel from the
vehicle fuel tank to the fuel connection piece of the
heater via fuel lines. Installation is usually carried out
near the fuel tank. The metering pump contains no
pulsation damper. The metering pump is connected
to the control unit via the heater-unit wiring harness
and to an earthing point on the vehicle body.
NOTE
Only the model DP42 fuel metering pump
may be used for the Thermo Top EVO
heater. Observe the model designation on
the component for this purpose. When re-
placing the metering pump, the CO
2
set-
tings must be checked.
0 - 90°
Summary of Contents for thermo top evo
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