Spheros Thermo S 160, Workshop Manual

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Thermo S 160/230/300/350/400 3 Assemblies and components
301
3 Assemblies and components
descriptions
The Spheros Thermo S 160, S 230, S 300, S 350 and
S 400 water heater systems are used in conjunction with
the vehicle heating system
– to heat the passenger compartment
– to defrost the windows
– to preheat water-cooled vehicle engines.
The water heater operates independently from the vehicle
engine and is connected to the cooling system, the fuel
system and the electrical system of the vehicle. It is bolted
down to the vehicle chassis or is secured using an
additional cross beam.
Heat is generated by combusti on of liquid fuels. The heat
it transferred to a coolant circulation system via the
heater's heat exchanger. In termittent operation adjusts
the heater to changing heat demand (cyclic operation).
The control unit controls heater activation and
deactivation based on the te mperature sensor signals.
The heaters of the Thermo S series mainly consist of the
following main components:
– Burner Head
– Combustion chamber
– Heat exchanger
A circulating pump is externally installed in the system, or
for compact devices directly on the heater.
1
2
3
5
6
7
8
9
10
11
4
1 Burner
2 Coolant, intake
3 Sensor plug
4 Temperature sensor with
integrated over-
heating protection
5 Coolant, outlet
Version for additional
sensor
12
6 Heat exchanger
7 Exhaust outlet
8 Fuel, return
9 Combustion air, intake
10 Fuel, flow
11 Splashguard
(screen alternative)
12 Screen
13 Hot air elbow
(incl. adapter)
(screen alternative)
13