Webasto Thermo Top Evo - B, Installation Instructions Manual

Page: 17 / 27

Fuel
27
8.3.1. Line installation
When installing the fuel line, it must be kept as short as possible.
The line must be installed protected against damage (e.g. stone impact) in
all areas.
The fuel line must always be routed in cool areas to prevent the formation
of bubbles due to warming.
High fuel temperatures can cause heater malfunctions. As a result, the line
may not be routed either past strong heat sources (e.g. exhaust gas) or near
stored heat zones.
In addition, the steepest possible routing of the fuel line must be ensured
from the fuel tank to the heater.
Fuel lines must be fastened in accordance with the latest technology so
that, for example, line sag is avoided.
Rub protection must be installed at sharp-edged transitions.
Do not route fuel lines through the vehicle interior.
8.3.2. Line design
Only lines approved by Webasto may be used as fuel lines.
8.3.3. Connecting two lines with a hose
The correct connection of fuel lines with a hose is shown in fig. 10.
Legend fig. 10:
41) Hose clamp
42) Air bubble
Ensure that there are no leaks.
8.3.4. Metering pump
The metering pump is a combined delivery, metering and shut-off system
and is subject to specific installation criteria (see fig. 11).
The Thermo Top Evo heater may only be operated together with the DP 42
metering pump.
8.3.5. Installation location
The metering pump may not be installed in the radiation area of hot vehicle
parts. A heat shield must be used if necessary. The pump should preferably
be installed near the tank.
The permissible ambient temperature is dependent on the fuel used, see
chapter 15, "Technical data".
8.3.6. Installation and attachment
The metering pump must be secured with a vibration-damping mounting.
The installation position is restricted as shown in fig. 11 (maximum inclina-
tion of metering pump, axial installation position of metering pump) to en-
sure good self-bleeding.
The arrow indicates the direction of flow of the fuel.
Intake line length [m] max. 3.0 m
Intake height [m]
(Height difference
between fuel tank and
metering pump)
max. 1.0 m
Delivery line length [m] max. 9.0 m