General Description - Webasto Air Top Evo 3900 Workshop Manual

Air Top Evo 3900/5500
2

General description

The Air Top Evo 3900 and Air Top Evo 5500 air heaters
are based on the evaporator principle and essentially
consist of the following
– The drive unit with a combustion and hot air blower
– The heat exchanger
– The burner insert with combustion pipe
– The control unit
To control and monitor it, the heater has
– a control unit with temperature sensor
– a glow plug / flame monitor
– an overheating sensor
inside it.
Air Top Evo 3900/5500 air heater
2 General description
The fuel supply is provided from an external source using
a metering pump.
If a fault occurs, an error code will be output in the display
of the combination or standard timer. If the heater has a
control element, the ON control light will flash.In addition
the heater can be checked using a personal computer
(see PC heater diagnostic operating manual).
The heater may be controlled using an external
temperature sensor instead of the internal temperature
sensor.
Air Top Evo 3900/5500 air heater without casing
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