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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.
Motorized version
†
Belimo servomotor:
BFL24T, BFL230T
Siemens servomotor:
GRA126
Siemens servomotor:
GRA326
4/14
4
Motorized fire dampers electical wiring
To connect the dampers to the power supply, proceed as follows:
• Check that the voltage and electrical frequency are equivalent to
those of the motor of the servomotor (check the motor's informa-
tion label);
• Make the connections as shown in the below diagram.
Electrical wiring for motorized version
24V AC/DC power supply
/- Negative (DC) or neutral (AC) black wire
~/+ Positive (DC) or phase (AC) red wire
230V AC power supply
N
L
Microswitches position contacts
S1 Common closed damper microswitch
S2 Normally closed, closed damper microswitch
S3 Normally opened, closed damper microswitch
S4 Common open damper microswitch
S5 Normally closed, open damper microswitch
S6 Normally opened, open damper microswitch
We reserve the right to make changes without prior notice
rev 20-12
Neutral blue wire
Phase brown wire
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