with these optional accessories will depend on the power supply connection method. If connected as shown in Fig.4, the air exhaust fan will start automatically when
the air humidity level exceeds the start threshold of the humidity sensor. Next, the air exhaust fan will stop when the air humidity level is reduced below the stop
threshold, plus the stop delay time set with the stop delay timer.
If connected as shown in Fig.3, the air exhaust fan can also be started with its standard light sensor or operating the separate on/off switch. When the indoor light is off
or the on/off switch is turned off, the air exhaust fan will stop after the stop delay time set with the potentiometer if the humidity level in the room is below the level
preset on the potentiometer. The humidity detection system is the master system.
NOTE: When the green diode located in the electronic system is on, it means that the humidity level in the room is higher than the preset on the
potentiometer controlling the humidity level adjustment. As long as the diode is on, the fan will not start counting down the stop delay after which the fan is
switched off. It will take place only after the humidity level in the room drops and the green diode goes off.
PIR (part index suffix “R”).
Connect the air exhaust fan with the PIR motion sensor as shown in the electrical wiring diagram, see Fig. 4.
The air exhaust fan starts when the PIR motion sensor detects someone in the room. The air exhaust fan is equipped with stop delay which is counted from the moment
of the last detection of motion in the room. The stop delay time and the sensitivity of the sensor can be set with a potentiometer knob on the electronic module. The
adjustment range of the delay is 3 -30 min. Minimum delay time value and the sensor sensitivity is achieved by turning the potentiometer knob counter-clockwise. The
stop delay time is adjusted in infinite increments. The maximum sensing range of the PIR motion sensor is shown in the figure 6.
Fig. (part index ending in “F”).
Fan models with a light sensor and timer should be connected as shown in Fig.4.
The fan can operate in two modes (use a microswitch located on the controller to change the operating mode):
Mode A:
The fan is switched on when an increase in light intensity is detected in the room. After the light in the room is switched off, the fan is still working using the
switch-off delay setting.
Mode B:
The fan is switched on when the room lighting is switched off. The fan operates for a preset switch-off delay time or until the lighting system is switched on
again.
The fan off delay time can be adjusted by means of a potentiometer located on the controller, in the range of 3–30 minutes. The minimum stop delay time can be set
with the potentiometer rotated counter-clockwise.
Calibration:
After installing the fan, it needs to be calibrated. Calibration is done by switching on and off the room lighting 4 times at intervals of no more than 2
seconds. The end of the calibration process will be signalled by the fan with 8 quick starts.
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