General information
Maintenance and safety instructions
Dear Webasto user
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 50.
The water heaters Thermo 50 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
equipment must be installed in accordance with the enclosed installation instructions.
The installation must be checked in accordance with statutory installation provisions.
Refer to the installation instructions for more details.
The year in which the heater is used for the first time must be permanently marked on
the rating plate by removing the inapplicable year figures.
If the Thermo 50 heater is installed in hazchem vehicles, then not only the requirements
of the motor vehicle construction and use regulations but also the provisions of the
relevant edition of ADR (Accord européen relatif au transport international des
marchandises dangereuses par route) must be complied with.
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In filling stations and tank farms.
In places where explosive vapours or dust may build up
(e.g. near fuel, coal, wood dust or cereal stores).
In enclosed rooms (e.g. garages), not even via the timer
or Telestart.
nnbe 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.
The heater :must not be operated
Danger of explosion
and suffocation!
The heater must not:
D
!
Operation of the heater
nnbe 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.
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n 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 must:
G
Before switching the heater on, set the vehicle heating system to the "warm" position
and the vehicle heater fan to the lowest setting (less power consumption)!
The heater is started up by means of the switch or the 'instant heat' button on the digital
timer.
A brief 40-second after-run period is initiated automatically if
- the vehicle engine is shut off,
- a pumping device is put into operation.
Subsequently, the control unit is in its "fault lock-out" mode. Before the heater can be
restarted it must be switched off by means of the switch or the 'instant heat' button on the
digital timer.
The disconnect switch (Emergency Stop switch) may only be actuated in an emergency
situation since this will shut the heater down without any after-run being performed
(danger of overheating).
Applicable to Thermo 50-TRS/ADR only:
Ident-Nr. 67027C 3/0502
Operating Instructions
Water Heater
Thermo 50
Webasto Thermosysteme International GmbH
Postfach 80 - D-82132 Stockdorf - http://www.webasto.de
n Warranty claims may only be asserted providing the
claimant is able to demonstrate that the maintenance and
safety instructions have been followed.
Standard Timer
Switching the
heater on
General
Switching the
heater off
Operation
Setting time/
day of the
week
Viewing
the time
Programming
heater starting
time
Recalling/
erasing preset
times
Programming
duration of
operating time
Setting the
remaining
operating time
Setting the
wakeup time
Recalling/
erasing the
wakeup time
Remote control
Manually: by pressing the button (continuous heating mode)
Automatically: by programming the heater starting time
The standard digital timer enables you to preset the start of the
heater operation up to 7 days in advance.
It is possible to program 3 different starting times, only one of which
can be activated.
The standard digital timer features a wakeup alarm function.
When the ignition switched on, the timer displays the current time
and the day of the week. When the heater is switched on, the display
and the buttons are illuminated.
After the power supply has been connected, all symbols on the
display will flash. The current time and weekday must be set.
The timer can be operated in that all flashing symbols can be
adjusted by means of the and buttons. If the buttons are not
pressed within 5 seconds, the time displayed will be stored. If the
and buttons are pressed for more than 2 seconds, the fast timesetting mode is activated.
If the ignition is switched off while the heater is operating in the
continuous mode, the remaining operating time of 15 minutes is
displayed and the heater continues to operate for this period of time.
Manually: by pressing the button
Automatically: after the programmed operating time has elapsed
With the heaterrunning: by programming the remainingoperating time
Press the button for more than 2 seconds - time of the day is
flashing - and set the clock using the and buttons. Day of the
week is flashing - adjust the day of the week.
With the ignition switched off: press the button
Press the button - the memory location is flashing - using the
and buttons set start of the heater operating time. Day of the week
is flashing - set the day of the week. By repeatedly pressing the
button, memory locations 2 and 3 can be programmed or the time
display mode can be reached.
Repeatedly press the button until the desired memory location is
displayed. To erase the preset time, press the button several
times until the time of the day is displayed instead of the memory
The heater must be switched off. Press the button for 3 seconds operating time is flashing - and set the desired operating time (10 to
120 minutes) using the and buttons.
Set the desired remaining operating time (1 to 120 minutes) using the
And buttons. The remaining operating time refers to the time
the heater still continues to remain in operation. It can only be
changed while the heater is in operation and the ignition switched off.
A wakeup time can only be programmed on the standard digital timer.
The wakeup time is not bound to a specific day of the week.
Repeatedly press the button until the bell symbol appears on
the display. Set the desired wakeup time using the and
buttons.The alarm clock turns off after 5 minutes or when one of the
buttons is pressed.
Repeatedly press the button until the bell symbol appears on
the display - read off wakeup time. To erase the wakeup time: press
the button until the bell symbol is no longer visible on the
display.
Possible by means of an optional external "instant heating" button
day of the week heater "on" indicator
forward
Standard Timer
instant
heating
reverse
program
selection
time
alarm indicator
memory location
time display
2
MO
Vehicles
with TRS
equipment
On TRS/ADR vehicles it is not possible to program a preset starting
time. The remaining time is shown on the display while the heater is
in operation. The clock can be set. The alarm clock function can be
programmed on the standard digital timer.
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