Vents RO Instrucciones De Uso página 5

L - live terminal (only for 220-240 V power mains);
N - zero terminal (only for 220-240 V power mains);
LT - timer control line;
WARNING! The fan rated for 12 V power mains (marked on the fan casing) connect to 12 V power
mains only!
ELECTRONIC CONTROL MODE
The fan with timer T is turned on after the external switch, for example, the light switch, supplies control
voltage to the input terminal LT (ST). After the control voltage is disconnected the fan continues running
within a time period set by the delay timer, adjustable from 2 to 30 min. The model VT is switched on and
off by the internal pull cord switch.
The fan with timer T1 is turned on after the external switch, for example, the light switch, supplies control
voltage to the input terminal LT (ST) and the turn-on delay timer is activated. The fan start-up is disabled
before the timer countdown is finished. The turn-on delay time is adjusted over two ranges - from 10 to 90
seconds and from 2 to 30 minutes. Selection of the required adjustment range is effected with a jumper
on the timer circuit board. After the control voltage is off the fan continues operation within the time period
set by the timer from 2 to 30 minutes.
The fan with the timer and humidity sensor TH is turned on after control voltage supply to the input
terminal LT (ST) or after the indoor humidity H exceeds the set point from ~60% to ~90%. After the control
voltage is off or if the humidity level drops below the set point the fan continues operating within the set
time period from 2 to 30 minutes. To set the maximum humidity set point, turn the potentiometer control
knob to H max (90%) position.
To adjust the turn-on delay time turn the control knob of Tz potentiometer clockwise to increase the set
point and counterclockwise to decrease it.
To adjust the turn-off delay time turn the control knob of T potentiometer clockwise to increase the set point
and counterclockwise to decrease it.
To adjust the humidity set point turn the control knob of H potentiometer clockwise to increase the humidity
set point and counterclockwise to decrease it.
Warning! The timer circuit is under mains voltage. Disconnect the fan from power mains prior to any
adjustment operations. The fan delivery set includes a specially designed plastic screwdriver for fan
settings adjustments. Use the screwdriver to alter the turn-off delay time or the humidity threshold, see
fig. 21. Do not use a metal screwdriver, knife, etc. for adjustment operations not to damage the circuit board.
S - external switch;
S1 - external fan switch;
QF - circuit breaker.
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