Servicing Work; Visual Inspection; Removal And Installation - Webasto Dual Top ST 6 Workshop Manual

NOTE
The CO value is corrected with the Webasto Thermo
2
Test PC Diagnostics. The CO
must be carried out at the maximum heating capacity.
The measurement of the CO
prox. 20 mm in front of the end of the exhaust outlet
inside the exhaust pipe with a CO
MSI).
The measured CO value at an ambient temperature of 20 °C
2
must be 5.0 to 8.0 % vol. under partial load (2 kW).
At full load (6 kW) it should be 9.0 to 13.0 % vol. after setting
the CO value.
2
7.6

Servicing work

To ensure functional reliability of the heater the following servi-
cing must be performed in regular intervals:
n You must switch the heater to "OFF" before cleaning.
n Clean the outside of the heater (do not use high-pressure
water or air hoses to prevent water ingress).
n Disinfect the water supply system.
See Operating Instructions.
n Descale the water supply system.
See Operating Instructions.
n Examine electrical connections for corrosion of contacts,
and to make sure that the contacts are secure.
n Examine the following lines for signs of damage to make
sure that the lines are safe and clear:
– Exhaust lines
– Combustion air lines
– Cooling air lines
– Cold air intake lines
– Hot air distribution lines
NOTE
Some parts of the system, especially the exhaust, may
have a shorter life than the heater itself.
Especially if the vehicle is used in areas with salty condi-
tions, like near seas and oceans. Check these parts es-
pecially carefully and replace them if necessary.
n Inspect fuel lines for leaks.
n Check cold and hot water lines for signs of damage and to
make sure that they are secure.
n Inspect hoses for cracks.
n Check the manual drainage function with the control panel.
7.7

Visual inspection

Check if the entire system has been installed in accordance with
the Installation Instructions.
7.8

Removal and installation

7.8.1 Heater: removal and installation
Heater removal
1. Drain the water contents.
2. Disconnect the battery.
3. Disconnect the wiring harness plug X11.
4. Disconnect the cable to the fuel pump at plug X3.
5. Disconnect the following from the heater:
– Hot air hoses
– Exhaust pipe
– Combustion air line
– Cooling air hose/cooling air intake cover
9019782C WSH Dual Top ST
measurement and setting
2
value is carried out ap-
2
tester (e.g. from
2
– Cold air intake line/rubber bellows
– Fuel line (seal off with suitable sealing plug, etc.)
– Hot and cold water lines
6. Remove four M8 nuts from the hammerhead bolts.
7. Remove the heater.
Installation
See Installation instructions.
7.8.2 Control panel: removal and installation
Disassembly manual control panel (Dual Top ST 6)
1. Disconnect the battery.
2. Remove the control panel as shown (see Fig. 8).
3. Disconnect the wiring harness plug X11.
4. Disconnect plug X0 from the room temperature sensor.
Fig. 8 Disassembling the manual control panel
Disassembly programmable control panel (for Dual Top ST
6 and 8)
1. Disconnect the battery.
2. To remove the control panel, place one or two suction cups
on the control panel. Alternatively, slide some flat, smooth
material (such as a plastic card) under the control panel on
the left and on the right.
3. Pull to remove the control panel from the adapter.
Take care not to damage the control panel or the furniture.
See chapter , "Control panel: removal and installation" on
page 20.
4. Disconnect wiring harness plugs X4 and X5.
5. Disconnect plug X0 from the room temperature sensor.
Servicing | 7
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