Bosch SSB120, Руководство по обслуживанию

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6720866940 (2017/11) US SSB
10 | Main components
4 .8 Flue temperature sensor
The flue temperature sensor (Fig. 13) is located on the bottom of the heat
exchanger. It’s an immersion type NTC sensor rated at 10KΩ @ 77°F . It
prevents flue gas temperatures in excess of 100°C (212°F).
Flue temperature sensor
Fig. 13 Flue temperature sensor
4 .9 Fan
The fan (Fig. 14) is located on the top of combustion chamber and
fastened to the burner head. The fan has an integrated PWM speed
control.
Fig. 14 Fan
4 .10 Gas valve
The proportional gas valve (Fig. 15 - Fig. 16) is located above the fan and
it’s connected to the Venturi. The gas valve has 2 safety solenoid valves.
The gas valve regulates the air/fuel ratio on the basis of combustion air
delivery (the air/fuel ratio is 1:1).
Fig. 15 Gas valve SSB85 - SSB120
gas valve
Fig. 16 Gas valve SSB160
4 .11 Venturi
The Venturi (Fig. 17 - Fig. 18) is integrated in the fan for all models. Its
function is to mix the air and fuel.
1 2
3
4
Fig. 17 Venturi SSB85 - SSB120
Component
[1] Fan
[2] Venturi
[3] Air inlet
[4] Gas inlet
Tab. 2 Venturi SSB85 - SSB120