Webasto DUAL TOP RHA-100 Workshop Manual - page 27
Dual Top
6 Servicing work
601
6
Servicing work
6.1
General
This section describes the servicing work that can be carried
out on the heater when it is installed.
WARNING
There is a potential danger of burns as the heater and its
components may be very hot.
6.2
Work on the heater
Disconnect the main power cable from the service battery
before carrying out any work on the heater. The battery
power must not be disconnected whilst the heater is oper-
ating or slowing down as a result of the risk of the heater
overheating and the overheating guard thus being tripped.
If you wish to carry out extensive repair work on the heater,
it may be a good idea to remove it completely.
Refer to the relevant installation instructions for repairs that
necessitate the installation position being changed.
6.3
Work on the vehicle
IMPORTANT
A temperature of 85 °C must not be exceeded in the vicinity
of the heater in any circumstances (for example when com-
peting painting work on the vehicle).
6.4
Heater test run
WARNING
The heater must not be operated in enclosed areas such as
garages and workshops without an emissions extraction sys-
tem.
6.5
Servicing work
To ensure functional reliability of the heater the following
servicing must be performed in regular intervals:
•
the heater must be switched "OFF" before cleaning.
•
clean heater exterior (do not use high-pressure water or
air hoses, prevent the ingress of water).
•
examine electrical connections for corrosion of contacts
and to ensure that they are secure.
•
check the following lines for signs of damage, to ensure
that they are secure and clear:
- exhaust,
- combustion air,
- cooling air,
- heating air intake and
- hot air distribution.
IMPORTANT
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 conditions, like near
seas and oceans. Pay extra attention to these parts and
replace them if necessary.
•
inspect fuel lines for leaks.
•
check cold and hot water lines for signs of damage and
to ensure that they are secure.
•
inspect hoses for cracks.
•
check the manual drainage function with the Control
Panel.
6.6
Visual inspections and installation
instructions
Check if the whole application is installed in accordance
with the Installation Instructions.
6.7
Removal and installation
IMPORTANT
When the heater is installed it must not be dismantled.
6.7.1 Heater, removal and installation
6.7.1.1 Removal
1. Drain 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 from the heater:
- hot air hoses,
- exhaust pipe,
- combustion air line,
- cooling air hose,
- heating air intake line,
- fuel line (close with suitable plug or any other means),
- hot and cold water lines.
6. Remove four M8 nuts from the hammerhead bolts.
7. Remove the heater.