Bosch Sensixx B35L Repair Instructions page 13

6. Water outlet: This hose takes water from the tank to the
pump, which then drives it towards the boiler.
7. Ventilation inlet for priming the pump: To avoid the pump
to work in vacuum, at the outlet of the pump there is a safety
overpressure valve. This valve opens when there is a
blockage or overpressure at the entrance of the boiler, and
directs the water back into the tank.
8. Float: It contains a magnet, to lower the water level, is
approaching a switch Reed (lack of water sensor), which
activates the LED of lack of water.
9. Without water sensor: Reed switch that closes when float
reaches the bottom of the tank. When the Reed switch closes,
lights the indication of lack of lack of water.
4.1.4 Pump
6
10. Pump: The pump drives water from the tank into the boiler. It
is activated in two situations:
►
When the upper boiler NTC (18) detects more than 190ºC
(empty water tank).
►
When the lower boiler NTC (16) detects more than 170ºC.
214_58300000171747_ARA_EN_A – 01.03.a
10 7 11
Important!
The pump has a diode, so it is important to respect
the polarity of the connections
11. Hose to water inlet in the boiler
4.1.5 Boiler
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