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Siemens motorized version
1. Manual closing switch
2. Manual opening lever
3. Screwdriver
4. Position indicator
Blade closing mode
Automatic closing with thermal fuse.
The control mechanism has a thermosensitive element that automa-
tically closes the blade when the temperature in the duct or in the
room exceeds 72°C (or 95°C for the 95°C version).
To close the damper when the motor is connected, press the switch
on the temperature sensor or cut off the power supply.
Blade opening mode
Make sure that the damper is open before the ventilation system
start-up, otherwise there is a risk of product malfunction.
To open the damper with the electric motor driven actuator, provi-
de power supply to the motor. Refer to the section Electrical con-
nections for further information.
To manually open the damper, use the handle supplied and carefully
rotate counterclockwise to the 90 °C indicator. To hold the damper
in open position, rotate the screw anticlockwise as shown in the pi-
cture.
During the manual opening of the damper, power must not be sup-
plied to the motor.
Position indication microswitches
The motorized versions are supplied with two microswitches to
show the blade's position (open or closed). Refer to the section
Electrical connections for further information.
Closing by remote control
If power to the motor is cut off, the blade will close.
Temperature calibration of thermosensitive element for auto-
matic damper closing
72 °C±7 °C (Standard)
95 °C±9 °C (On request).
ELEC TRICAL CONNEC TIONS
Electrical wiring
Electrical connections must be done by qualified and trained people.
Switch off the power supply before starting any work on the electric
elements. Never switch on the power supply during electrical con-
nections.
1. SC (closed damper) microswitch - on request
2. SA (open damper) microswitch - on request
3. Magnet - on request
4. Magnet cables for wiring
SC/SA microswitches position
1. "NC" contact of SC microswitch. When the fire blade is closed the circuit
is open.
2. "NO" contact of SC microswitch. When the fire blade is closed the circuit
is closed.
3. "NC" contact of SA microswitch. When the fire blade is open the circuit
is open.
4. "NO" contact of SA microswitch. When the fire blade is open the circuit
is closed.
rev 20-10
4
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