Webasto Thermo Top Z Notice De Montage page 34

Regulations governing installation
2.5. Combustion air inlet
2.5.1. The air for the combustion chamber of the heater must not be
extracted from the passenger cabin of the vehicle.
2.5.2. The air inlet must be positioned in such a way that it cannot be
obstructed by other objects.
2.6. Hot air inlet
2.6.1. The supply of heating air must consist of either fresh air or
recirculated air and must be taken from a clean area which cannot be
contaminated by exhaust fumes from the engine, the internal
combustion heater or any other source in the vehicle.
2.6.2. The inlet line must be protected by a grating or other suitable
means.
2.7. Hot air outlet
2.7.1. Hot air lines within the vehicle must be positioned or protected in
such a way as to exclude all risk of injury or damage caused by direct
contact.
2.7.2. The air outlet must be positioned or protected so that it cannot be
obstructed by other objects.
2.8. Automatic control of the heating system
When the engine stops, the heating system must cut out automatically
and the fuel supply must be stopped within 5 seconds.
The heating system may remain in operation if a manual unit has
already been activated.
30
Thermo Top Z / Thermo Top C
IMPORTANT
Failure to follow the installation instructions and the notes contained
therein will lead to all liability being refused 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 invalidation of the type
approval for the heater and therefore of its homologation / EC type
licence.
NOTE:
Contrary to point 2.2.3 the heater must also not be installed in the
passenger cabin of class M1 and N vehicles. A device in a sealed cover,
which also meets the requirements set out in paragraph 2.2.2, may be
used, however.
1.2. General regulations
1.2.1. Exhaust
Exhaust pipes must be positioned at an adequate distance (at least
20 mm) from heat-sensitive vehicle parts (underseal, plastics parts, etc.).
1.2.2. Fuel lines
The fuel line must be installed in cool areas to prevent the formation of
bubbles due to heating.