Spheros Thermo S 160, Workshop Manual

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3 Assemblies and components Thermo S 160/230/300/350/400
304
3.1.5 Electronic ignition unit with ignition
electrodes
The electronic ignition unit induces the high voltage
required for ignition of the fuel-air mixture. Ignition is
triggered by a high voltage spar k, which is initiated on the
ignition electrode.
3.1.6 Temperature sensors with water
temperature sensor and integrated
overheating protection
The water temperature sensor captures the coolant
temperature at the heat exchanger outlet as electrical
resistance.
This signal is transmitted to the control unit, where it is
processed.
The overheating protection integrated into the temperature
sensor is responsible for temperature limitation.
Similar to the water temperature sensor, the coolant
temperature is captured at the heat exchanger outlet as
electrical resistance and transmitted to the control unit.
Overheating protection prevents inadmissibly high heater
operating temperatures.
At a temperature greater than 125°C heater deactivation
and interlocking is initiated.
It is not necessary to man ually reset the overheating
protection.
3.1.6.1 Adapter wiring harness
It is possible to disconnect the temperature sensor plug
from the adapter wiring harness. Thus, the hood does not
need to be removed for burner head removal.
Flame detector
Window
Electronic ignition unit
Disc
Electronic ignition unit
Ignition electrode
Temperature
sensor