Technical data

Use / version Thermo 90 S / Thermo 90 ST
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2 Use / version
2.1. Use of the water heaters
The Webasto water heater is used in connection with the vehicle's own
heating system
– to heat the cab,
– to defrost the vehicle windows and
– to preheat water-cooled engines.
The water heater operates independently of the engine and is
connected to the cooling system, the fuel system and the electrical
system of the vehicle.
The Thermo 90 S and Thermo 90 ST heaters differ from each other in
their component plug and in the fact that they have different control
modules.
2.2. Versions
2.2.1. Thermo 90 S version
Thermo 90 S petrol
Water heater for "petrol" fuel
Thermo 90 S diesel
Water heater for "diesel" fuel
The water heaters are designed for 12 V (Thermo 90 S petrol) and for
12 or 24 V (Thermo 90 S diesel).
2.2.2. Thermo 90 ST version
Thermo 90 ST petrol
Water heater for "petrol" fuel
Thermo 90 ST diesel
Water heater for "diesel" fuel
The water heaters are designed for 12 V (Thermo 90 ST petrol) and for
12 or 24 V (Thermo 90 ST diesel).