General Description - Webasto Air Top Evo 40 Series Service Manual

IMPORTANT:
•
The heater may not be exposed to temperatures of more than 85°C (storage temperature). Otherwise the
electronics may suffer permanent damage.
•
Do not stand on the heater and do not place any heavy items on the heater.
•
Do not place any items of clothing, textiles, or similar material over the heater or in front of the cold air inlet
and the hot air outlet.
•
The current of hot air in the heater must not be restricted or blocked by highly inflammable substances or
materials such as rags, cleaning wool, etc.
•
Flammable or explosive substances and gases must not be placed near or in contact with the heater, the hot
air line, the hot air flow or the exhaust pipe.
•
The heater must not be cleaned with a high pressure cleaner.
•
Do not switch the heater off at the main battery switch or battery isolation switch, since otherwise it is
possible that it may suffer long term damage if it is switched off frequently using the battery isolation switch
and this can cause damage and negative influences on the function of the heater.
Liability Claims
Failure to follow the installation instructions and the notes contained therein will lead to all liability being refused by
Webasto.
The same applies if repairs are carried out incorrectly or with the use of parts other than genuine spare parts. This will
result in the heater's warranty being voided, and therefor also of the General Homologation/ECE Type Approval.
Be sure to read the operating instructions before putting the heater into operation.

2. General Description

The Air Top Evo 40 / Air Top Evo 55 air heater designed according to the evaporator principle mainly consists of the
following:
– The drive unit (drive motor with combustion and heating air fan)
– The heat exchanger
– The evaporator mount with combustion pipe
– The control unit
– The glow plug
– The housing parts
– The base seal
To control and monitor it, the heater has the following internal components:
– A control unit with room temperature sensor, speed sensor (Hall sensor) and air pressure sensor
– An overheat temperature sensor
– An exhaust temperature sensor
The fuel supply is ensured externally via a fuel pump. The heater can be controlled with an internal room temperature
sensor or an external room temperature sensor (optional).
Air Top Evo 40 / Air Top Evo 55 Service Manual
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