Installation Instructions
Legal Provisions for Installation
For testing the heater in accordance with articles 19, 20
oder 21 StVZO the following regulations are primarily to be
observed (§ 22 a StVZO):
NOTE:
These provisions are binding within the scope of the
StVZO (German Road Licensing Regulations) and
should also be observed in countries where no special
locally applicable regulations are in effect!
Within the scope of th e StV Z O (G er ma n Roa d Lice nsi n g
Regulations) “G en er al Desig n C er tif i cat i on s” ha ve be en
granted by the Federal Office for Motor Traffic for the
Thermo 90 water heater with the following marks of approval:
~
S231 for Thermo 90 heaters Petrol type BW 80
~
S232 for Thermo 90 he at er s Diesel typ e DW 80 an d
for Thermo 90-ADR heater Diesel type DW 80.
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S299 for Thermo 90 S heaters Petrol type Thermo 90 S B
~
S298 for Thermo 90 S heaters Diesel type
Thermo 90 S D and for Thermo 90 S-ADR
heaters Diesel type Thermo 90 S D
The installation of th e he at er s must be pe rf or me d in accordance with these Installation Inst ructio ns. The insta llation must be checked
a) upon the homolog at ion of th e veh icl es in acco rd an ce
with § 20 StVZO
b) upon any individual tes t in accordance with
§ 21 StVZO, or
c) upon any examination in accordance with § 19 StVZO
by a registered expert or examin er for mot or t raffic, an
expert for automotive vehicles, or any other authorised
official, in accordance with paragraph 4 of
Appendix VIIIb to the StVZO
and in the case of item c) the proper install a tion must be
certified on the appro val cer tif ic at e con ta ine d on the design certification stating the following:
- vehicle manufacturer
- vehicle type and
- vehicle identification number
The effectiveness of the design certification (homologation) is dependent on this certificate. The approval certification is to be kept in the vehicle.
The year of the initial operation must be durably marked
on the type plate of the hea t e r by th e inst all e r by re mo ving
the years that do not apply.
Extracting the combustion air from the interior of the vehicle is not permissible.
The discharge opening of the exhaust pipe must point upward, sideways or, in the case of routing the exhaust pipes
along the underside of the bottom vehicle, it must be located near the later al or rea r edge of the driver’s cab or vehicle. Exhaust pipes must be so routed that the possibility
of exhaust fumes ente rin g th e i nt er ior of th e veh icle i s
remote. The functioning of any parts of the vehicle essential for its operation must not be impaired.
The openings of the combustion air inlet and exhaust gas
outlet must be so designed that a spherical object of 16
mm in diameter cannot be introduced.
Electric lines, switchgear and control gear of the heater
must be so arranged in the veh i cle th at the i r proper functioning cannot be impa ire d under normal oper at ing cond i tions.
For the routing of fuel lines and the installation of additional fuel tanks articles 45 and 46 StVZO are to be adhered to. The most important excerpts therefrom are as follows:
Fuel lines must be designed in such a way that they remain unaffected by torsio na l stre sses in th e veh icle, engine movement and th e lik e. They must be prot ected
against mechani cal da ma ge. Fuel-carrying pa rt s must be
protected against excessive heat and must be arranged
such that any dripping or evaporating fuel can neither collect nor be ignited by hot components or electrical equipment.
The heater must not be installed in rooms occupied by persons.
The operating state of the heater at any given time – at
least an indication as to whether it is “on” or “off” – must
be easily recognizable.
Webasto will not assume any liability if the installation instructions and the no te s cont ai n ed the re in ar e no t ob served. The same applies to improperly performed repairs
or those where others than genuine replacement parts
have been used. In those cases, the heater’s General Design Certification and thus the General Operating Permit
(homologation) will be invalidated as a consequence.
Use of the Water Heaters
The Webasto Thermo 90 water heater in conjunction with
the vehicle heating system is designed to provide the following features:
- heating the driver’s cab,
- de-frosting the vehicle ’s win dscree n as w ell as
- preheating of w at er -cool e d en gin es.
The water heater operates independently of the vehicle’s
engine and is connected to the cooling system, the fuel
system and the electrical system of the vehicle.
Thermo 90 / Thermo 90 S
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