9
Blade rotation axis positioning
The fire damper can be installed both with the blade axis positioned
vertically or horizontally.
Positioning brackets before fixing
1. Positioning brackets
Indications for the correct duct suspension and for damper
connection
CAUTION: Refer anyway to law and national standardization.
Flexible connectors compensate any duct thermal expansion and
wall bending in case of fire.
In general it is always appropriate the use of flexible connectors for
the followings installations:
– light walls;
– Plasterboard and rock wool or Fire Batt (Weichschott) sealing;
– Applique fixing system.
Flexible connector should be normal flammability.
It is recommended not to compress flexible connectors in the in-
stallation phase.
Take care that the flexible connector does not interfer with opening
/ closing movement of the blade.
Refer to the section Technical data for blade exposition values.
Fire damper and short extension ducts have to be connected to each
other and fixed at the bottom and near the damper and suspended
from the ceiling.
1. Fire damper
2. Sealing
3. Short extension duct
4. Flexible connector
5. Duct
1. Sealing
2. Fire damper
3. Short extension duct
4. Flexible connector
5. Duct
1. Short extension duct
2. Flexible connector
L Air duct length
Lf Flexible part length of flexible connector
The length (Lf ) of the flexible element must be equal or higher to 1%
of air duct length.
The minimum length (Lf ) of the flexible element is equal to 250 mm
for circular damper.
The minimum length (Lf ) of the flexible element is equal to 100 mm
for rectangular damper.
1. Short extension duct
2. Flexible connector
L Air duct length
Lf Flexible part length of flexible connector
The length (Lf ) of the flexible element must be equal or higher to
0.5% of air duct length.
The minimum length (Lf ) of the flexible element is equal to 250 mm
for circular damper.
The minimum length (Lf ) of the flexible element is equal to 100 mm
for rectangular damper.
