Technical data

DBW 2010 / 2012 / 2020 / 2022 / 300 / 350 6. Function Test
605
6.3.5 Testing the fuel pump
WARNING
The fuel pump will be tested in installed status. The
adjustment of the pump pressure will be permitted. A test
device is necessary for the test. It is possible to supply a
test device for this from the Webasto support dealer
(indicator dial between 0 and 15 bar).
ATTENTION
The induction bobbin must be dismantled.
Test
- Dismantle the induction bobbin (refer to 9.2.7.1)
- Remove the vaporizer nozzle.
- Connect the test device.
- Cover the flame regulator.
- Start the heating device.
- The pump pressure will be exhibited in approximately
15 seconds (see the graphics).
- Shut off the heating device.
- Dismantle the test device.
ATTENTION
Do not harm the nozzle hole.
- Install the vaporizer nozzle and tighten with 20
Nm.
- Install the induction bobbin (refer to 9.2.7.2).
6.3.6 Testing the burner engine
WARNING
The burner engine will be tested in installed status. The
fan engine should be replaced if the situation cannot be
reached that should be reached.
Test
- Examine the status of the burner engine bearings
8whether or not there is any difficulty of movement).
- Measure the access voltage at the heating device.
- Start the heating device.
- Measure the revolution (the revolution should be in
the interval indicated in the nominal voltage).
DBW 2010/2012 …. 4050 – 4950
DBW 2020/2022 …. 5220 – 6380
DBW 300 …. 5220 – 6380
DBW 350 …. 5040 – 6160
6.3.7 Testing the magnetic valve
WARNING
In the case that the heating device produces smoke for a
long period during the post-operation, this is an indication
that there is a leak in the magnetic valve socket. In this
case, the fuel will continue to drip from the vaporizer
nozzle.
Smoke for a short period is normal. This results from the
emptying of the section between the magnetic valve and
nozzle hole.
Test
ATTENTION
Separate the socket of the magnetic valve from the
control device. Otherwise, the control device could be
damaged.
- Checking the electric function in the 12 Volt devices
according to the data below:
• Opening voltage 8.5 Volt
• Working voltage 9.6 … 14.4 Volt
• Power supply at nominal voltage and 20
0
C is 10 Watt
• Nominal current 0.83 ampere
- Testing the electric function in the 24 Volt devices
according to the data below:
• Opening voltage 17.0 Volt
• Working voltage 19.2 …. 28.8 Volt
• Power supply at nominal voltage and 20
0
C is 10 Watt
• Nominal current 0.42 ampere
6.3.8 Testing the front heating element of
the nozzle block
WARNING
The heater cartridge in the nozzle block will be activated
over the thermostat when the temperature is < 0
0
C. The
period of heating depends on the reflected radiation
temperature in the combustion chamber and it will be
shut off when the temperature at the thermostat is +8
0
C.
Power supply is 130 ± 13 Watt at 12 Volt or 24 Volt.
Test
- Turn the burner head sideward or remove it.
- Take out the socket in the nozzle block
- Connect the Ohmmeter to the socket
- Cool the thermostat with cooling spray or bridge the
thermostat.
- The resistance value (maximum 4.5 ȍ)