Webasto Air Top 3500 ST Workshop Manual - page 8
Air Top 3500/5000
1 Introduction
103
Exhaust Line
The heaters must be designed for exhaust emission to the
exterior.
Exhaust lines must be routed so that exhaust fumes are
unlikely to penetrate into the vehicle's interior.
The function of any part of the vehicle essential for
operation must not be impaired. No condensate or water
penetrations may accumulate in the exhaust line. Drain
holes may be provided as required; these must drain the
liquid to the exterior via drain lines sealed against the
vehicle interior.
The exhaust line outlet is to point upwards (with rain
protection), or in case of exhaust venting below the
vehicle floor, to be located at the nearest possible location
of the vehicle's or cockpit side or rear end pointing
downwards.
In compartments accommodating persons, exhaust lines
must not have more than one disconnect and must have
a splash-water protected feedthrough in the exterior wall/
floor. For water, that has penetrated into the exhaust line,
the connection of a drain line with a metal-sealing joint is
permissible. The drain pipe must be routed sealed
through the exterior wall or the vehicle floor.
The heat exchanger, the exhaust line connected, as well
as the possible drain pipe must be sealed so that with an
overpressure double the overpressure of the exhaust
having the maximum permissible exhaust line length – at
least however at an overpressure of 0.5 bar – a total leak
rate of 30 l/h is not exceeded.
The line including feedthrough, disconnects, material and
specific type must be described in the installation
instructions.
The line must require tools for installation and removal
and must be protected against damage, and must be
long-time shockproof.
Metal lines must be used. These may not heat to more
than 110° C should the possibility of body contact exist
within the room interior. Protective devices against body
contact may be fitted.
Should exhaust pipes be routed through rooms
accommodating persons, these pipes shall be renewed
after 10 years using genuine spare parts.
Combustion Air Inlet and Exhaust Outlet
In installations these ports for combustion air entry and
exhaust fume exit must be of such type, that a ball of
16 mm in diameter cannot be inserted.
Electrical lines, switch gear, and control gear of the heater
must be located in the vehicle so that their proper function
cannot be impaired under normal operating conditions.
For the routing of fuel lines and the installation of
additional fuel tanks §§ 45 and 46 of the StVZO are to be
adhered to.
The most important regulations are: fuel lines are to be
designed in such a way that they remain unaffected by
torsional stresses in the vehicle, engine movement, and
the like. They must be protected against mechanical
damage.
Fuel-carrying parts are to be protected against heat
disturbing operation and are to be arranged so that any
dripping or evaporating fuel can neither accumulate nor
be ignited by hot components or electrical equipment.
In busses fuel lines and fuel tanks may be located neither
in the passenger area nor in the driver's compartment. In
these type of vehicles the fuel tanks must be located such
that they do not pose a direct hazard to the exits in the
event of a fire. Fuel supply must not be by means of
gravity or pressurization of the fuel tank.
Installation Instructions for Webasto Fuel Tanks for
Fuel Supply of Heaters in Vehicles
In busses the installation is not permitted in the
passengers or driver's compartment.
The fuel filler neck must not be located in the passengers
or driver's compartment of any type of vehicle.
The heater operating condition – at least "on" or "off" –
must be clearly visible.
1.6
Corrections and Improvements
Deficiencies, improvements, or proposals for correction of
this workshop manual are to be mailed to:
Webasto Thermosysteme GmbH
Abt. Technische Dokumentation
D-82131 Stockdorf
Telephone: 0 89 / 8 57 94 - 5 42
Telefax:
0 89 / 8 57 94 - 7 57.