Webasto Air Top Evo 3900 Workshop Manual - page 8
1 Introduction
Air Top Evo 3900/5500
102
2.2.2. The combustion heater shall not constitute a risk of
fire, even in the case of overheating. This
requirement shall be deemed to be fulfilled if the
installation ensures an adequate distance to all
parts and suitable ventilation, by the use of fire
resistant materials or by the use of heat shields.
2.2.3. In the case of M2 and M3 vehicles, the heater must
not be positioned in the passenger compartment.
However, an installation in an effectively sealed
envelope which also complies with the conditions in
paragraph 2.2.2 may be used.
2.2.4. The label referred to in paragraph 1.4 (model plate),
or a duplicate (duplicate model plate), must be
positioned so that it can be easily read when the
heater is installed in the vehicle.
2.2.5. Every reasonable precaution should be taken in
positioning the heater to minimise the risk of injury
and damage to personal property.
2.3.
Fuel supply
2.3.1. The fuel filler must not be situated in the passenger
compartment and must be provided with an
effective cap to prevent fuel spillage.
2.3.2. In the case of liquid fuel heaters, where a supply
separate to that of the vehicle is provided, the type
of fuel and its filler point must be clearly labelled.
2.3.3. A notice, indicating that the heater must be shut
down before refuelling, must be affixed to the
fuelling point. In addition a suitable instruction must
be included in the manufacturer's operating
manual.
2.4.
Exhaust system
2.4.1. The exhaust outlet must be located so as to prevent
emissions from entering the vehicle through
ventilators, heated air inlets or opening windows.
2.5.
Combustion air inlet
2.5.1. The air for the combustion chamber of the heater
must not be drawn from the passenger
compartment of the vehicle.
2.5.2. The air inlet must be so positioned or guarded that
blocking by rubbish or luggage is unlikely.
2.6.
Heating air inlet
2.6.1. The heating air supply may be fresh or recirculated
air and must be drawn from a clean area not likely
to be contaminated by exhaust fumes emitted
either by the propulsion engine, the combustion
heater or any other vehicle source.
2.6.2. The inlet duct must be protected by mesh or other
suitable means.
2.7.
Heating air outlet
2.7.1. Any ducting used to route the hot air through the
vehicle must be so positioned or protected that no
injury or damage could be caused if it were to be
touched.
2.7.2. The air outlet must be so positioned or guarded that
blocking by rubbish or luggage is unlikely.
2.8.
Automatic control of the heating system
The heating system must be switched off
automatically and the supply of fuel must be
stopped within five seconds when the vehicle's
engine stops running.
If a manual device is already activated, the heating
system can stay in operation.
1.4.2 General safety information
The mouth of the exhaust pipe should be installed
upwards, to the side or, if the exhaust pipe passes under
the floor of the vehicle, to the side or rear limit of the
driver’s cab or the vehicle.
The function of important parts of the vehicle must not be
adversely affected. It must not be possible for condensate
or water to collect in the exhaust pipe.Drain holes may be
used.
The electric cables and controls for the air-conditioning
system must be arranged in the vehicle so that their
proper functioning cannot be adversely affected in normal
operating conditions.