Webasto Thermo Top E Manual
Dear Webasto customer!
We presume that the principle and mode of operation of your new heater has been explained
to your complete satisfaction by the workshop / service centre which installed the heater. This
manual summarizes the main points of importance for using the heaters Thermo Top E, C
and P.
The water heaters Thermo Top E, C and P have been type-tested and approved in accordance
with Directives 2001/56/EC (heaters) and 72/245/EEC (EMC) within the territory governed by
European Directive 70/156/EEC.
The units must be installed in accordance with the enclosed installation instructions.
The heater must not be operated :
• In filling stations and tank farms.
• At locations at which highly flammable gases or dusts can
form, and at locations at which highly flammable liquids or
solid materials are stored (e.g. near fuel, coal and wood
dust, grain warehouses, dry grass and leaves, cardboard ,
paper, etc.)
• In enclosed rooms (e.g. garages), not even via the timer or
Telestart.
The heater must not:
• be exposed to temperatures of more than 120 °C (storage
temperature), otherwise the electronics may suffer
permanent damage.
• be operated without at least 20% brandname anti-freeze in
the water of the heating circuit.
General information
Maintenance and safety instructions
Danger of explosion
and suffocation!
Operating and maintenance
instructions
Thermo Top E
Thermo Top C
Thermo Top P
The heater must:
• be operated with the fuel specified on the rating plate and
at the nominal voltage specified on the rating plate.
• be taken out of operation by removing the fuse if smoke
develops, if unusual burning noises are heard or if there is a
smell of fuel.
The heater must not be restarted until the unit has been
checked by personnel duly trained by Webasto.
• be operated for 10 minutes at least once per month, with
the engine cold and the fan set to the minimum setting.
The heater must be inspected by a specialist at the
beginning of the heating season or earlier.
Liability:
• Non-compliance with the installation instructions and the
warnings contained therein will lead to the exclusion of all
liability by Webasto. The same also applies if repairs are not
undertaken by professionals or without using genuine spare
parts. This invalidates the type approval for the heater and
its homologation / EC type permit.
The heater can be started via the timer or Telestart unit, depending on its configuration. If no
special instructions on adjusting the vehicle heating during auxiliary heater operation are
available, then the vehicle heating must be set to "warm" before switching on the heater.
The heater fan in the vehicle should be set to the 1st speed in the case of a 3-speed
fan and to the 2nd speed in the case of a 4-speed fan. Fans with infinitely variable
speed should be set to at least 1/3 of the fan performance.
NOTE:
We recommend that the heating time be set in accordance with the driving time.
Heating time = driving time
Example: For a journey lasting approx. 20 minutes (one way), the duty period should
not exceed 20 minutes.
If the optional summer / winter switch has been installed for the heater, it must be set in
accordance with the time of year. In this case, the heater will heat the interior of the vehicle
when set to the winter position and merely operate the vehicle fan to ventilate the
interior of the vehicle when set to the summer position .
Operation of the heater
If a fault occurs, check that the fuses and plug connections are in perfect condition and
secure.
When a fault occurs, the heater switches to the fault interlock; an error is not indicated on
the clock display.
Always try to cancel the fault interlock before calling a Webasto service centre.
The following faults can be remedied directly by the user:
Note:
The heater switches on again when the fuse is refitted.
Please contact a Webasto service centre if the fault cannot be remedied in this way.
Fault description Possible cause Remedy
Heater switches off
automatically (= fault lock-
out)
No combustion after
starting and restarting.
Flame goes out during
operation.
Switch off heater and switch
on again (not more than
twice).
Heater does not switch on. Heater is without electric
power.
Check power supply to heater
and ground connections.
Heater switches off during
operation (= fault lock-out).
Heater has overheated
due to lack of coolant.
Refill coolant as directed by
manufacturer.
Interrupt power
supply by removing
the 20 A fuse
(yellow) in the
heater cable
harness
Refit the fuse. Briefly press ON button
on transmitter on left or
press buttton on
timer
Interrupt power
supply by
removing the 20 A
fuse (yellow) in the
heater cable
harness
Refit the fuse.
The heater
switches on
again.
Action in the event of faults
To cancel the fault interlock
ON
ON
Wait
approx.
3 s
Wait
approx.
3s
Wait
approx.
3s
Webasto AG
Postfach 80
D - 82131 Stockdorf
Germany
Phone: (+44) 1302 322232
Fax: (+44) 1302 322231
www.webasto.com
Ident-No. 9000814D • 07/09 • Errors and omissions excepted • Printed in Germany • © Webasto AG, GCS 2009
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