10
EN
ELECTRONICS OPERATION ALGORITHM
The fan with the timer T — the fan is started after actuation of the external switch, e.g. the light switch. The control voltage
is supplied to the input terminal LT (ST).
After the control voltage is off the fan continues to operate within the set time period adjustable from 2 to 30 minutes by the
timer.
The VT model is turned on and off by the pull-cord switch.
The fan with the timer T1 — after turning on the switch, for example, a light switch, the fan is switched on in a set turn-on
delay time period, adjustable from 0 to 2 minutes.
After the switch is turned off the fan keeps operating for a set turn-off delay time period, adjustable from 2 to 30 minutes.
The fan with the timer and the humidity sensor TH — the fan starts after the control voltage is supplied to the input
terminal LT (by using a pull cord switch for VTH models) or if indoor humidity level Hexceeds the set point adjustable from ~60
% to ~90 %.
After the control voltage is off (by using a pull cord switch for VTH models) or the humidity level has decreased the fan will keep
running within the time set by the timer ranging from 2 to 30 minutes.
To set the maximum humidity setpoint 90 %, set the potentiometer to Hmax position.
To adjust the fan turn-on delay time, turn the control knob Tclockwise to increase and counter-clockwise to decrease the turn-
on delay time respectively.
To adjust the humidity set point turn the control knob Hclockwise to increase and counter-clockwise to decrease the humidity
sensor set point.
CAUTION! The timer circuit is live! 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 it to change the
turn-on and turn-o delay time and the humidity set point.
Do not use a metal screwdriver, knife, etc. for adjustment operations not to damage the circuit board.
DO NOT USE A METAL SCREWDRIVER, KNIFE, ETC. FOR ADJUSTMENT
OPERATIONS NOT TO DAMAGE THE CIRCUIT BOARD.
