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The USW22 is module which controls operation of the fan. It is powered from 230V AC lines and serves for periodical ventilation of rooms, as well as for short ventilation, for example after turning on the lighting. The triac with zero voltage crossing is main working element. Built-in SW1 and SW2 switches allow change break duration of the fan and delay work time after turning off the lighting. The LED diode indicates an output state. More information: 
(95kB )
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