Webasto Air Top 3500 ST Workshop Manual - page 7
1 Introduction
Air Top 3500/5000
102
When installing the Air Top 3500 and Air Top 5000 in
vehicles intended for the transportation of dangerous
goods, the TRS 002 and TRS 003 (Technical Guidelines
for Regulations concerning the transportation of
dangerous goods on roads) must be met in addition to the
StVZO (Road Traffic Licensing Regulations).
The heater must not be installed in the passenger or driver
cabin of busses. Should the heater nevertheless be
installed in such a compartment, the installation box must
be sealed tight against the vehicle interior. There must be
sufficient ventilation of the installation box from the
exterior in order not to exceed a maximum temperature of
40 °C in the installation box. Excessive temperatures may
cause malfunctions.
At filling stations and fuel depots the heater must be
switched off as there is a potential danger of
explosion.
Where flammable fumes or dust may build up (e.g. in
the vicinity of fuel, coal, wood, cereal depots, or
similar installations) the heater must be switched off
to prevent explosions.
Due to the danger of poisoning and suffocation the heater
must not be operated, not even with timer, in enclosed
areas such as garages or workshops not equipped with an
exhaust venting facility.
When removing the heater the bottom gasket must be
renewed.
The heat exchanger of the air heater remains
serviceable for a maximum of 10 years and must then
be replaced with an original spare part by the
manufacturer or by one of its authorized workshops.
The heater must then be provided with a label
detailing the sales date of the heat exchanger and the
words "original spare part".
When replacing the heat exchanger it is mandatory
to also replace the overheat protection element
(temperature limiter) to avoid possible malfunctions
when using the old temperature limiter.
The heater must be inspected by an expert in time before
the beginning of the heating season.
Should the heater develop strong smoke emissions over
extended periods of time, unusual combustion operating
noise or smell of fuel, the heater must be made
inoperative by removing the fuse and returned into service
only after inspection by Webasto trained personnel.
Claims for warranty may only be made providing evidence
by the claimant that maintenance and safety regulations
have been met.
Ignoring installation instructions and its procedures will
void the warranty by Webasto. The same applies to
unskilled repairs or repairs not using original spare parts.
This will cause loss of the heater's marks of conformity
and thus the vehicle's permit of operation.
1.5
Legal Provisions for Installation
For testing the heater in accordance with § 19, 20, or 21
of the StVZO the following regulations are to be observed
in particular (§ 22 a StVZO):
Testing is performed upon presentation of the operating
and installation instructions of the manufacturer.
The year of the initial operation must be durably marked
on the heater identification plate by the installing person.
Heating Air System
Heating air intake openings must be arranged so that
under normal operating conditions exhaust fumes of the
vehicle engine or air heater are not likely to be sucked in.
Extracting combustion air from the vehicle interior is
prohibited.
Combustion Air Line
The required air for combustion must be taken in from the
exterior.
Within rooms accommodating persons, the combustion
air lines must not have more than four disconnects and a
splash-water protected exterior wall feedthrough. The
disconnects must be sealed in a way not to exceed a leak
rate of 200 l/h at an overpressure of 0.5 mbar.
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.