Webasto Air Top 2000 ST D Service And Repair Manual - page 7
Webasto Product N.A., Inc.
2
www.techwebasto.com
INTRODUCTION
AIR TOP 2000 ST
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.
The following points for the installation of fuel lines and
the installation of additional fuel tanks must be observed.
•
Fuel pipes must be designed in such a way that
torsion in the vehicle, movements by the engine and
the like do not have a negative effect on their
durability. They must be protected from mechanical
damage.
•
Parts that carry fuel must be protected from heat
that will adversely affect their function and
positioned so that dripping or evaporating fuel
cannot collect or ignite on hot parts or on electrical
equipment.
•
The fuel lines (Mecanyl hose) must not be
immediately next to the exhaust pipe and must be
thermally insulated if necessary, otherwise they will
pose a fire risk.
•
All pipes that come into contact with fuel must have
sealed connections, they must not be damaged in
any way and the must be checked at regular intervals
(at least the same intervals as for inspection of the
vehicle as a whole).
NOTE: If any damage or leaks are found on
the fuel line, the heater must not be used until
the damage has been rectified by an authorized
Webasto workshop.
Put the heater out of action by removing the
fuse.
Installation regulations for Webasto fuel tanks for
supplying fuel to heaters in vehicles:
•
The tank must not be installed in the passenger or
driver’s cabin of buses.
•
The fuel filler neck must not be inside the passenger
or driver’s cabin in any vehicle.
•
Fuel tanks for normal or super grades of petrol must
not be immediately behind the front trim of the
vehicle. They must be separated from the engine in
such a way that in the event of an accident the fuel
will not be expected to ignite. This does not apply to
tractor units with an open driver’s seat.
The air heater’s heat exchanger can be used for a
maximum of 10 years and must then be replaced by the
manufacturer or one of its authorized workshops using a
genuine spare part. A label must then be affixed to the
heater showing the date of sale and the wording
“Genuine spare part”.
When you change the heat exchanger it is essential that
you also replace the overheating protection element
(overheating sensor) to prevent possible function faults
caused by using the old overheating sensor.
The Air Top 2000ST air heaters are prepared for interior
installation and sealing directly on the cabin floor or a
cabin wall. Non-release connections must be used in the
interior for combustion air and exhaust pipes with the
accessories available from Webasto.
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.
The hot and combustion air intake openings must be
positioned in such a way that no water can ingress into
them if the vehicle drives through a water hazard for
which it has been approved.
For passenger carrying vehicles such as shuttle busses,
transit busses, and coaches, where the heater is to be
installed in the passenger cabin, a protective cover or
installation box should be installed over the heater to
prevent contact with hot surfaces by passengers and
heat sensitive objects.
The protective cover or installation box must have
sufficient external ventilation to ensure that a maximum
temperature of 40°C (104°F) is not exceeded in the box.
Malfunctions may occur if the temperature exceeds this
level.
The heater must be switched off at filling stations and
fuel tank farms because of the risk of explosion.
Wherever inflammable vapors or dust may form (for
example near fuel, coal, wood dust or cereal stores or the
like), the heater must be switched off because of the risk
of explosion.
The heater must not be operated in enclosed areas, such
as garages or workshops without an exhaust emissions
extraction system, not even using the timer, because of
the risk of asphyxiation and poisoning.
In the event of lengthy heavy smoke development,
unusual combustion noise or a smell of fuel, the heater
must be put out of action by removing the fuse and must
not be started again until it has been examined by
Webasto-trained personnel. Liability claims can only be
lodged if the claimant can prove that he has complied
with the servicing and safety instructions.
Overheating
Keep hot air inlet and hot air outlet free of dirt and other
items. Dirty, blocked air lines can cause the heater to
shut down due to overheating.
After an overheating lock-out, check that the air system
is clear, remove any materials that may block the air flow
and have any damage to the air lines repaired by an