Webasto Thermo 90 ST Service And Repair Manual - page 7
www.webasto.us
1
Webasto Product N.A., Inc.
THERMO 90 ST
INTRODUCTION
1.
INTRODUCTION
1.1
C
ONTENTS
AND
P
URPOSE
This repair shop manual is intended to assist trained
personnel with repairing both the gasoline and the diesel
versions of the Thermo 90 ST water heaters.
1.2
M
EANING
OF
S
IGNAL
W
ORDS
Throughout this manual, the signal words DANGER,
WARNING, CAUTION, and NOTE have the following
meanings:
DANGER: This heading and text style is
used to highlight that non-compliance with
instructions or procedures will cause
injuries or lethal accidents to personnel.
WARNING: This heading and text style is
used to highlight that non-compliance with
instructions or procedures may cause
injuries or lethal accidents to personnel.
CAUTION: This heading and text style is
used to highlight that non-compliance with
instructions or procedures may cause
damage to equipment.
NOTE:
This heading and text style is used to
highlight and draw attention to information we
feel you would like to have. It could have to do
with procedures and tips that will help you work
more efficiently.
1.3
A
DDITIONAL
D
OCUMENTATION
This workshop manual contains all the information and
instructions required for repairing Thermo 90 ST water
heaters. Normally, there is no need to use additional
documentation. If required, the installation instructions,
the vehicle-specific installation instructions and the
operating instructions can be used as well.
1.4
S
AFETY
I
NFORMATION
AND
R
EGULATIONS
In principle, the general accident prevention regulations
and current works safety instructions are applicable.
The “General safety regulations” that go beyond the
scope of the above regulations are stated below.
Any special safety regulations relevant to this instruction
manual will be highlighted in the relevant sections or text
passages of the procedures.
1.4.1
G
ENERAL
S
AFETY
R
EGULATIONS
The year of first start-up must be indelibly
identified on the rating plate by removing the
corresponding year number.
The heaters are only licensed for heating the motor
vehicle engine and vehicle cabin, not however for
heating hazardous material transport space.
The heater is only allowed to be installed in motor
vehicles or in independent heating systems with a
minimum coolant volume of 6 liters (6.34 quarts).
The heater is not allowed to be installed in the driver’s
cab or passenger compartment of vehicles. If the heater
is nevertheless installed in such a place, the installation
box must be tightly sealed against the vehicle interior.
The installation box must have sufficient external
ventilation to ensure that a maximum temperature of
40 °C (104 °F) is not exceeded in the box. Malfunctions
may occur if the temperature exceeds this level.
WARNING: The heater must not be
operated in enclosed areas, such as garages
or workshops without an exhaust
emissions extraction system, not even
using the timer or Telestart, because of the
risk of asphyxiation and poisoning.
WARNING: The heater must be switched
off at filling stations and fuel tank farms
because of the risk of explosion.
CAUTION: Wherever inflammable vapors
or dust may form (for example near fuel,
coal, wood dust or cereal stores or the like),
the heater must be switched off because of
the risk of explosion.
A temperature of 85 °C (185 °F) (storage temperature)
must not be exceeded in the vicinity of the control unit
(for example when completing painting work on the
vehicle).
If this temperature is exceeded, the electronic systems
may suffer permanent damage.
Follow the instructions supplied by the vehicle
manufacturer to check the cooling water level. The
water in the heating circuit of the heater must contain at
least 10% branded anti-freeze.
Non-compliance with the installation instructions and the
warnings contained therein will lead to the exclusion of
all liability by Webasto. The same applies if repairs are
carried out incorrectly or with the use of parts other than
genuine spare parts. This will result in the revocation of
the type licence for the heater and therefore the general
operating licence for the vehicle.