Webasto DBW 46 Operations Instructions download pdf (Page 3)

Installation Instructions

Legal Provisions for Installation

For testing the heater in accordance with Section 19, 20 or

21 StVZO (German Regulations Authorising the Use of Ve-

hicles for Road Traffic) the following regulations are primar-

ily to be observed (Section 22 a StVZO):

NOTE:

These provisions are binding within the scope of the

StVZO and should also be observed in countries

where no special locally applicable regulations are in

effect!

Within the scope of the StVZO ”General Design Certifica-

tions” have been granted by the Federal Office for Motor

Traffic for the BBW 46 and DBW 46 water heaters with the

following design approval numbers:

S 185 for heaters BBW 46 - petrol

S 186 for heaters DBW 46 - diesel

The installation of the heaters must be performed in ac-

cordance with these Installation Instructions. The installa-

tion must be checked

a) upon the homologation of the vehicles

in accordance with Section 20 StVZO

b) upon any individual test

in accordance with Section 21 StVZO, or

c) upon any examination

in accordance with Section 19 StVZO by a

registered expert or examiner for motor traffic, an

expert for automotive vehicles, or any other

authorised official, in accordance with Paragraph

7.4 a of Appendix VIII to the StVZO,

and in the case of item c) the proper installation must be

certified on the approval certificate contained on the de-

sign certification stating the following:

- vehicle manufacturer

- vehicle type and

vehicle identification number.

The effectiveness of the design certification is dependent

on this certificate. The approval certification is to be kept in

the vehicle.

The year of initial operation must be durably marked by the

installer on the type plate of the heater by removing the

years that are not applicable.

Extracting the combustion air from the interior of the

vehicle is not permissible.

The discharge opening of the exhaust pipe should point up-

ward, sideways, or in the case that the exhaust pipes are

routed on the underside of the bottom of the vehicle, it

must be positioned near the lateral or rear edge of the

driver’s cab or vehicle.

Exhaust pipes must be routed so that the possibility of ex-

haust fumes entering the interior of the vehicle is 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 pipes must be so designed that a spherical object of

16 mm dia. cannot be introduced.

Electric lines, switchgear and controlgear of the heater

must be so arranged in the vehicle that their functioning

cannot be impaired under normal operating conditions.

For the routing of fuel lines and the installation of addi-

tional fuel tanks, Sections 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 re-

main unaffected by torsional stresses in the vehicle, en-

gine movement, and the like. They must be protected

against mechanical damage. All parts of the fuel system

must be protected against heat which would impair their

operation, and must be located such that dripping or evap-

orating fuel can neither collect nor be ignited by hot compo-

nents or electrical equipment.

The heater must not be installed in spaces 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 recognisable.

The installation of components which are not of an ap-

proved type will lead to the revocation of the General De-

sign Certification of the heater and thus the General Opera-

ting Permit of the entire vehicle. The same applies to im-

properly performed repairs or those where other than ge-

nuine replacement parts have been used.

Use of the Water Heater

The BBW 46 / DBW 46 water heaters, in conjunction with

the vehicle’s heating system, are used for

- heating the passenger compartment,

- defrosting the vehicle’s windows,

- preheating water-cooled engines.

The water heaters operate independently of the vehicle’s

engine and are connected to the cooling system, the fuel

system and the electrical system of the vehicle.

BBW 46 / DBW 46

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