Vents HBF 250, User Manual

Page: 11 / 16

11 www.ventilation-system.com
DO NOT USE A METAL SCREWDRIVER, KNIFE, ETC. FOR ADJUSTMENT
OPERATIONS NOT TO DAMAGE THE CIRCUIT BOARD
ELECTRONICS OPERATION ALGORITHM
Timer (T)
After turning on an external switch, such as a light switch, the fan turns on.
After the switch is turned off the fan keeps operating for a set turn-off delay time period, adjustable from 0 to 30 minutes.
Humidity sensor (TH)
If the set humidity level in the room is exceeded from 60 % to 90 %, the fan turns on.
As the indoor humidity level drops down the fan keeps operating for a set turn-off delay time period, adjustable from 0 to 30 minutes,
and then turns off.
The fan delivery set includes a specially designed
plastic screwdriver for fan settings adjustments.
Use it to change the turn-on and turn-off delay time
and the humidity set point.
H
60%
90%
T
off
2 min
30 min
— To adjust the fan turn-on delay time, turn the control knob Ton clockwise to increase and counter-clockwise to decrease the
turn-on delay time respectively, adjustable from 0 up to 2 minutes.
— To adjust the humidity set point, turn the control knob H clockwise to increase and counter-clockwise to decrease the humidity
sensor set point, adjustable from 60 % up to 90 %.