Webasto Thermo Top Z Shop Manual page 36

8 Servicing
correct
hose clamp
wrong
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Fig. 805 Pipe/Hose Connection
8.6.2.2 Dosing Pump
The dosing pump is a combined delivery, dosing and
shut-off system and is subject to certain installation
criteria (Fig. 803 and 806).
Concerning the installation location of the dosing pump it
must be ensured that the maximum pressure at the
tapping location is below the permissible value (see table
of 8.6.2.).
It is advantageous to mount the dosing pump in a cool
location. The ambient temperature must never exceed
+ 20° C during operation.
Dosing pump and fuel lines must not be installed in
locations exposed to heat radiated by hot vehicle
components. A heat shield is to be provided as necessary.
The preferred installation location is near the tank.
The dosing pump is to be attached with an anti-vibration
mount. The installation position is limited according to
Fig. 806 to ensure sufficient self-venting capability.
804
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Thermo Top E and Z/C
Preferred
Dosing Pump DP2 – Fuel –
0°
Dosing Pump DP30 – Diesel –
Fig. 806 Dosing Pump, Installation Position
8.6.2.3 Combustion Air Supply
A combustion air intake line is required.
The combustion air intake location must be protected
against splash water.
The combustion air line may routed in several bends (total
of 270°, smallest bending radius 50 mm). The maximum
line length without air intake muffler is 1000 mm.
NOTE
When using the air intake muffler the maximum air line
length is 400 mm.
The combustion air must under no circumstances be
taken in from rooms accommodating persons. If the
heater is contained in an installation box, a vent hole of at
2
least 3 cm is required.
Should the temperature within the installation box exceed
the permitted ambient temperature of the heater, the vent
hole must be enlarged after consulting Webasto.
The combustion air intake must be located so that
clogging by contamination is not to be expected. The
intake must not point in the direction of forward motion.
When installing the heater in the vicinity of the vehicle fuel
tank in a common installation compartment, the