Webasto Thermo 50 - User Manual

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.
n
n
n
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.
n
n
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.
The heater :must not be operated
Danger of explosion
and suffocation!
The heater must not:
D
!
Operation of the heater
n
n
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.
n
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.

Summary

Maintenance and Safety Instructions

Prohibited Operation Locations

Lists locations where heater operation is forbidden due to safety risks like explosion or suffocation.

Operational Prohibitions

Details conditions the heater must not be subjected to, like extreme temperatures or low antifreeze levels.

Operation of the Heater

Initial Heater Setup

Instructions on setting vehicle heating system and fan before heater activation for efficient operation.

Standard Timer Functions

Heater On;Off Control

Manual and automatic methods for switching the heater on and off using the timer.

Setting Time and Weekday

Procedure to set the current time and day of the week on the timer display.

Programming Start Times

How to program up to three distinct heater start times and select one for activation.

Managing Preset Times

Recalling and erasing previously programmed heater start times from memory.

Setting Operating Duration

Configuring the desired heating time, from 10 to 120 minutes.

Setting Wakeup Alarm

Programming a separate alarm function on the timer, independent of heating schedule.

Managing Wakeup Alarm

Viewing and deleting the programmed wakeup alarm time.

Troubleshooting Guide

Fault Lock-out and Reset

Actions to take during a malfunction, including checking fuses and resetting fault lock-out.

Fault Code Display Information

Interpreting Fault Codes

Explains how fault codes appear on the timer display indicating specific malfunctions.

Webasto Thermo 50 Specifications

General

Fuel	Diesel
Voltage	12V / 24V
Heating capacity	5 kW
Heating power	5.0 kW
Power supply voltage	12 V / 24 V