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FDR-3G…OF
Installation 3H - Hilti
Filling made only from Hilti foam
Tip: Excess material can be reused as the filling for this installation. It can be inserted into the cavity before you add
new foam from the gun.
1. The supporting construction opening must be prepared as depicted. Opening surfaces must be even and cleaned
off. The flexible wall opening must be reinforced as per the standards for plasterboard walls. The opening
dimensions are driven by the nominal dimensions of the damper with added clearance. For circular dampers
prepare the opening of diameter D1.
2. Insert the damper into the opening concentric and fixing it with the opening using the bendable hangers and
suitable screws (F1).
3. Wear protective gloves when handling foam. Insert the barrel of the foam gun into the middle of the cavity
between damper and opening and fill it completely with foam (F17) pushed out foam can be quickly hand pushed
back into the cavity.
4. After the filling (F17) is solidified, though it will always remain partly flexible, you can cut the excess foam that
stands out from the wall.
5. If needed, uncover and clean the damper after installation.
6. Check the damper’s functionality
Installation - Standard Distances
According to the standard EN 1366-2, the minimum distance from the wall or ceiling to the damper body is 75 mm. For
multiple crossings through a fire resistive wall the minimum distance between two damper bodies is 200 mm. This
applies for distances between the damper and a nearby foreign object crossing the fire resistive wall.
Installation - Smaller Distances
The distance between 2 individual fire dampers can be reduced to 60 mm, measured from surface to surface of the
housing and the distance between the surface of the damper installed in the duct and the adjacent supporting
construction (wall/floor) can be reduced to 40 mm.
Installation in a Wall thinner than tested
Installation in a thinner wall is allowed under the condition that an additional layer/layers of fire protective board are
fixed to the surface of the wall in order to achieve the same length of damper penetration seal as was tested. The
minimum width of added boards around the damper is 200 mm. In addition, the alternative thinner wall should be
classified in accordance with EN 13501-2:2007 + A1: 2009 for fire resistance required for product application. For a
protruding wall, the additional layers must be fixed on the steel supporting construction of the wall.
3H Hilti
FDR-3G...OF
DN200 ... DN630
EI 60 (v
e
- i ↔ o) S
a)
b)
360°
EI 90 (v
e
- i ↔ o) S
Summary of Contents for A-FDR-3G-OF
Page 1: ...FDR 3G OF Overflow Fire Damper FDR 3G...
Page 13: ...13 46 FDR 3G OF 250 DN 630 Standardardly in position B On demand in position L T...
Page 17: ...17 46 FDR 3G OF...
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Page 46: ...Systemair DESIGN 2021 04 27 Handbook_FDR_3G_OF_en GB...
