11
Standby mode
(fan does not run)
or
24 Hours mode
(Fan operates at 40-33 m3/h)
Fan operation in
Silent mode
Turn-off delay timer
starts (5-15-30 min)
Switch is
activated
Temperature
rises
MAX (SILENT)
mode is activated
Temperature falls 2
°
C below
the set temperature point
Wiring diagram 4
L and N terminals are connected to live and neutral respectively. LT terminal is connected to live through the external
momentary switch that is activated by opening a door. The fan is in standby mode and does not run. As 24 HOURS Mode
is activated the fan runs permanently at low speed to ensure minimum round-the-clock ventilation. As the external momentary
switch is closed the fan switches to SILENT mode for the period adjusted in the off-delay timer. After that the fan reverts to
standby mode. If the temperature set point is crossed, the fan is switched to MAX (by default) or SILENT (if set) mode.
After the indoor temperature falls 2
°
C below the set temperature point, the fan reverts to the previous mode.
L
T
L
N
Sk
N L