Fig. 804 Information Sign Of Dp40/Dp41 Metering Pump - Webasto Thermo Top V Workshop Manual

Thermo Top V
Overview of uses for metering pumps
Metering pump
DP41 ID No. 9009529_
DP40 ID No. 9002853_
IMPORTANT
Observe DP41 information sign (do not use for petrol)!

Fig. 804 Information sign of DP40/DP41 metering pump

IMPORTANT
The DP40 (ID No. 9002853_) may not be used for the
heater with solenoid fuel valve, as otherwise fuel may
escape!
The DP41 (ID No. 9009529_) may not be used for heaters
without solenoid fuel valve or for petrol heaters, as
otherwise fuel may escape.
WARNING
The use of the DP2 and DP30 is prohibited for the Thermo
Top V heaters.
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Use
Diesel heater with solenoid
valve (see section 2.2.2)
– Diesel heater without sole-
noid valve
– Petrol heater
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Delivery quantity of metering pumps DP40 and DP41
Modulation Diesel
frequency of
metering
pump [Hz]
1 115 ml/h
5.24 603 ml/h
(full load for
diesel)
6.14 -
(full load for
petrol)
7 40 ml in 180 sec.
(testing of
delivery quantity
with PC
diagnosis)
Tolerance of the delivery quantity: ± 10% depending on the
ambient conditions and the application.
Operating temperature
Pumping
medium ID No. 9009529_
Arctic Diesel -40 to +30 °C
Winter diesel -20 to +30 °C
Winter petrol not approved
Summer petrol not approved
WARNING
The metering pump and fuel lines must not be installed
within range of the radiated heat from hot vehicle parts. If
necessary, a thermal radiation guard must be provided in
order not to exceed the maximum permissible operating
temperature.
The metering pump requires a correct body earthing point
for operation. If faults occur in other wires in the vehicle, a
potential offset of the earthing point can occur. If the vehi-
cle earthing point is not 0 V, but is instead > +0.25 V, then
the heater may be supplied with an insufficient quantity of
fuel.
Electrical checking of metering pump
Resistance of metering pump at +20 °C: 5.2 ohms ± 5%
Servicing work
Petrol
109 ml/h
-
669 ml/h
38 ml in 180 sec.
DP41 DP40
ID No. 9002853_
-40 to -10 °C
-20 to +30 °C
-40 to +10 °C
0 to +20 °C
NOTE
803