214_58300000171747_ARA_EN_A – 01.03.a Seite 18 von 39
5.2 Regulation
5.2.1 Connection
The resistance power and the tank filling, are controlled by two NTC
and a pressure switch (model dependent), whose data are evaluated
by the PCB.
After switching on the unit, first checks if there is enough water in the
boiler. To do this, feeds the resistance. If the tank is empty, the
temperature of the air inside rises quickly. When NTC1 temperature
reaches 190ºC, the resistance power is cut off and the pump starts for
6 seconds to ensure that the resistance is below the water level.
5.2.2 Filling
The pump always works at intervals of 6 seconds and turns until
NTC1 temperature drops below 170ºC. During the initial filling, the
resistance is active, except for 6 seconds, during which still no enough
water in the boiler. When the water level reaches NTC1, sensor
temperature quickly drops below 170ºC and electronics interprets this
as "full tank" signal and stops the pump.
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