With An Interval Switch; With An Integral Photoelectric Sensor; With A Humidity Sensor - Vents Fan Operation Manual

I - with an interval switch:
Depending on the connection pattern the fan remains off or constantly operates at speed 1.
From time to time as set by the user (from 30 minutes to 15 hours) the fan switches to
maximum speed to operate for 10 minutes and then reverts to the initial state.
On external switch actuation the fan switches to maximum speed after 50 seconds.
On external switch tripping the fan reverts to the interval operation mode.
F - with an integral photoelectric sensor:
Depending on the connection pattern the fan remains off or constantly operates at speed 1.
When the lights are switched on the fan switches to the maximum speed in 50 seconds.
When the lights are switched off the fan continues at speed 2 for a period from 2 to 3 minutes
and then revert to the initial state.
The duration of fan operation at speed 2 is controlled by the built-in regulator.
H - with a humidity sensor:
Depending on the connection pattern the fan is off or constantly operates at speed 1.
The fan switches to speed 2 on with an increase of relative humidity level on the premises.
The sensor operating threshold can be set from 60% to 90%.
The unit switches off on relative humidity dropping 10% below the pre-set level.
The fan can be manually set to speed 2 on light switch actuation. In this case the actuation
delay is 50 seconds whereas the operating interval is controlled by the built-in regulator within
the range from 2 to 30 minutes.
ATTENTION!
The electronic circuit board is under mains voltage.
Make sure to disconnect the fan from the power mains prior to any adjustments.
The fan Delivery Package includes a special plastic screwdriver for adjusting the fan settings.
Use this tool to change the timer delay or humidity level settings (Fig. 79).
Using a metal screwdriver or a knife for adjustment may cause a circuit board failure.
To adjust the timer delay turn the knob of potentiometer T (T1) clockwise to increase the value
or counterclockwise to decrease it (Fig. 76-78);
To adjust the humidity threshold setting turn the knob of potentiometer C clockwise to
increase the value or counterclockwise to decrease it (Fig. 78).
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