module of the stop delay timer. The
minimum stop delay time is set at
3 min. with the potentiometer knob
rotated counter-clockwise to stop. Turn
the potentiometer knob clockwise to set
a longer stop delay time accordingly.
The maximum stop delay time setting is
30 min. The stop delay time is adjusted
in infinite increments. The stop delay
time is counted down from the time the
air exhaust fan senses the indoor lights
are off or turning the separate on/off
switch off to which the air exhaust fan is
connected. Hygrostat (part name suffix
‘H’). Connect the air exhaust fan with
the air humidity sensor (hygrostat) and
timer as shown in the electrical wiring
diagram in Fig.3 or Fig.4.
The air humidity sensor operating range
is 40% to 90% of relative humidity. This
accessory option includes the stop delay
timer. The operation of the air exhaust
fan 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 on 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.
INSTALLATION
The fan shall only be installed,
connected to electrical mains and
commissioned for use by qualified
personnel in accordance with applicable
laws!
Assembly
• Precisely determine where the fan will
be installed.
• Prepare the power cord. Use NYM-O
2x1.5 mm² (H07V-K 2x1.5mm²) or
NYM-O 3x1.5 mm² (H07V-K 3x1.5mm²)
with a maximum outside diameter of
7.5 mm, depending on the version of the
equipment.
NOTE: Before starting work, make sure
that the power cord is not live.
• Measure and drill holes for the fan
and ø6 mm wall plugs included with
the product.
• Remove the front clip-on panel (1).
• Remove the front clip-on frame (2)
of the fan.
• Remove the housing panel (3), which
is fixed with screws (7).
• Run the power cord in double
insulation through the grommet (9).
Insert a sufficient length of the cord so
that the wires can be connected to the
power terminals.
Before mounting the fan: remove all
foreign objects from its inside ; check
manually that the fan rotor turns freely;
make sure there is enough clearance
for the outlet check damper to open.
It is recommended to connect the
