Webasto Air Top Evo 3900/5500 B, Руководство по установке, Страница: 13 / 36

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Air Top Evo 3900/5500 Hot Air System
5. 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 inlet (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. The standard pause speed
for the blower motor is 0 rpm if the external temperature sensor is used
Inside the control unit there is a temperature sensor, 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 set point
generator. The heat output is controlled such that after the selected interior temperature has been reached quickly, it
is then kept at this selected value.
The internal diameter of the main section of the hot air line should be:
90 mm (3.54 in.) minimum for the Air Top EVO 5500
80 mm (3.14 in.) minimum for the Air Top EVO 3900
NOTE:
Only materials that can permanently withstand temperatures of at least 130°C (266°F) 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 transport people, the air outlet opening is to be directed in such a way that it is
at least 20 cm (8 in.) away from all body parts.
Maximum pressure drop between the inlet and outlet side of the hot air line:
Air Top EVO 3900 2.0 hPa
Air Top EVO 5500 3.0 hPa
1 hPa corresponds to 1 mbar corresponds to 10 mm Water Column (0.4 inches Water Column).
The heaters check the internal temperature rise automatically each time they are switched on. If this is above the
specified limits (150°C / 302°F), the start is cancelled and error messages F10 (Overheat code) is displayed. To ensure
that the heater functions stably, the flow resistance of the connected hot air system must be reduced.
The hot air hose must be secured at its connection points.
If the heater is used in recirculation mode, for example, in the under bunk compartment of a truck’s sleeper, without a
hot air directional outlet grille, do not short circuit the hot air flow.
Figure 8. Hot air inlet and hot air outlet (recirculation mode)