Hot Air System - Webasto Air Top 3500 Notice De Montage

Air Top 3500 / Air Top 5000
6

Hot air system

NOTE:
The heater must not be integrated into the vehicle's air system. Both
recirculation and fresh air modes are possible.
For fresh air mode it must be ensured that the hot air is taken from an
area protected from splashing water and spray and in such a way that
no water can ingress into the heater if the vehicle travels through a water
hazard for which that vehicle is licensed.
NOTE:
For fresh air mode an external temperature sensor must be fitted in the
appropriate zone.
A temperature sensor is installed in the heater on the hot air intake side,
which operates the heater in the appropriate heat output range in
conjunction with the control element depending on the intake
temperatures and the position of the setpoint generator. The heat output
is set such that after the selected interior temperature has been reached
quickly, it is then kept at this selected value.
Minimum internal diameter of the hot air line:
90 mm for the Air Top 5000
80 mm for the Air Top 3500
75 mm may be used if approved by the manufacturer
NOTE:
Only materials that can withstand temperatures of at least 150°C may
be used for the hot air line. The hot air opening is to be positioned in
such a way that the air is not blown on to any parts that cannot withstand
the heat.
IMPORTANT
In vehicles used to convey passengers the air output opening is to be
positioned so that nobody can be located in front of the air output.
Maximum pressure drop between the inlet and outlet side of the hot air
line:
Air Top 3500 2.0 hPaAir Top 3500 Volume Plus 3.0 hPa
Air Top 5000 3.0 hPa
1 hPa corresponds to 1 mbar corresponds to 10 mm WC.
The test can also be carried out by measuring the temperature on the
actual heater:
Maximum temperature difference between hot air inlet and hot air outlet
130 K.
If this value is exceeded the temperature limiter will trip. The hot air hose
must be secured at its connection points.
If the heater is used in recirculation mode without a hot air guide, do not
short circuit the hot air flow.
Fig. 7: Hot air inlet and hot air outlet
Hot air system
45