Introduction - Webasto Air Top Evo 40 Workshop Manual

Air Top Evo 40 / Air Top Evo 55
1.4.2 General safety precautions
The repair and commissioning of the unit may only be carried
out by personnel trained by Webasto. The repair and installa-
tion of the unit may only be carried out in accordance with
the workshop manual and the installation instructions.
The of the exhaust pipe ends is to be routed downward, to
the side or, with exhaust gas routing under the vehicle floor,
up to the proximity of the side or rear limitation of the cab or
the vehicle.
The function of parts important for vehicle operation may not
be impaired. It must not be possible for condensate or water
to collect in the exhaust pipe. Drain holes may be used.
Electrical lines, switching and control units of the heater must
be positioned in the vehicle so that their proper operation
cannot be impaired under normal operating conditions.
The ECE-R 122 Appendix 9 3.1.1 must be complied with for
the routing of fuel lines and the installation of additional fuel
tanks.
The main points from this law:
– All fuel tanks used to supply the heater must comply with
the following regulations:
(a) If a leak occurs, the fuel must flow off onto the
ground without it coming into contact with hot parts of
the vehicle or the cargo.
(b) Fuel tanks containing petrol must be provided with an
effective flame arrester at the filling opening or with a
cap with which the opening is kept hermetically sealed.
– The exhaust system and the exhaust lines must be
positioned or protected so that the cargo cannot be
subjected to dangerous heat-up or ignition. Parts of the
exhaust system located directly under the fuel tank
(diesel) must be positioned at a distance of at least
100 mm or must be protected by a heat shield.
The heat exchanger of the air heater may be used for a
maximum of 10 years and must then be replaced with
a genuine spare part by the manufacturer or one of its
authorised workshops. The heater must then be pro-
vided with a sign which bears the date of sale and the
word "Original spare part".
When replacing the heat exchanger, it is also mandatory to
replace the blow-out temperature sensor in order to prevent
possible faults when using the old blow-out temperature sen-
sor.
When installed in the vehicle interior, the Air Top Evo 40 / Air
Top Evo 55 heaters must be prepared for installation and
sealing off directly on the cabin floor or on a cabin wall. With
the accessories available from Webasto, detachable connec-
tions of the combustion air and exhaust lines are not permit-
ted in the vehicle interior.
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The seal between the heater mounting and the vehicle floor
must always be installed, otherwise harmful emissions may
get into the interior of the vehicle.
Cold and combustion air intake openings must be positioned
so that no water can penetrate during a water crossing per-
missible for the respective vehicle.
The combustion heater shall not constitute a risk of fire, even
in the case of overheating. This requirement shall be deemed
to be met 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.
(Requirement from ECE-R 122, Point 5.3.2.2.).
In the case of M2 and M3 vehicles, the combustion heater
must not be positioned in the passenger compartment. How-
ever, an installation in an effectively sealed envelope which
also complies with the conditions in paragraph 5.3.2.2 may
be used.
(Requirement from ECE-R 122, Point 5.3.2.3.).
The installation box must have sufficient external ventilation
to ensure that a maximum temperature of 40 °C is not
exceeded in the box. Malfunctions may occur if the temper-
ature exceeds this level.
The heater must be switched off at filling stations and tank
farms as a result of the risk of explosion.
Wherever inflammable vapours or dust may form (for
example in the vicinity of fuel, carbon, wood dust or cereal
stores or the like), the heater must be switched off as a result
of the risk of explosion.
The heater must not be operated in enclosed areas such as
garages and workshops without an emissions extraction
system, even if you use the timer, because of the risk of
asphyxiation and poisoning.
In case of longer lasting smoke emission, unusual combustion
noises or fuel odours, the heater must be shut down by
removing the fuse and may not be returned to operation
again until after it has been checked by personnel trained by
Webasto. Claims can only be made if it can be verified that
the claimant has complied with the servicing and safety
instructions.
The fuel lines may not make direct contact to the exhaust
pipe and must be thermally insulated if necessary, as other-
wise there is a fire danger.
All fuel-carrying lines must be connected leak-tight, may not
be damaged and must be inspected regularly (at least at the
same interval as the vehicle inspection).

Introduction

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