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FDR-3G…OF
Installation 2 - Dry
Using Mineral Wool and Cover Boards
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.
With these dampers it is necessary to install the bendable hangers (2) onto the cover boards using suitable screws or
screws with wall plug (F1). Therefore, it is necessary to begin by installing the bottom part/parts of the CBR-FD or CBS-
FD cover boards. Insert the damper from the mechanism side and secure the bendable hangers of the damper into the
cover plate using suitable screws (F1). Subsequently mount the remaining cover boards from the mechanism side.
Fill in the area between the wall and the damper with mineral wool (F3) with a density of at least 50 kg/m3
thoroughly but in such a way that will not deform the damper housing, while paying attention to prevent the fouling of
the damper’s functional parts, which could limit its correct functionality.
Close the gap between the damper and the mounting opening, for a circular damper use CBR-FD cover boards, for a
rectangular damper use CBS-FD cover boards with screws (F1) through pre-drilled holes.
All the gaps between the cover boards, between cover boards and the wall and between cover boards and the fire
damper need to be filled with fire resistive coating (F4).
If needed, uncover and clean the damper after installation.
Check the damper’s functionality
Installation - Standard Distances
For Dry installation, the minimum distance from the wall or ceiling to the damper body is 100 mm and for DN>560 the
distance is 150 mm. For multiple crossings through a fire resistive wall the minimum distance between two damper
bodies is 200 mm and for DN>560 the minimum distance is 300 mm. This applies for distances between the damper
and a nearby foreign object crossing the fire resistive wall.
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.
Summary of Contents for FDR-3G
Page 1: ...FDR 3G OF Overflow Fire Damper FDR 3G ...
Page 5: ...5 48 FDR 3G OF AM FD Activation Mechanisms CBR FD Cover Boards ...
Page 9: ...9 48 FDR 3G OF P15 Grid P16 Extended ductwork ...
Page 13: ...13 48 FDR 3G OF Dimensions Free area Dimensions Note 3 Inclusive bearing Overhangs Weights ...
Page 15: ...15 48 FDR 3G OF ø 250 DN ø630 Standardardly in position B On demand in position L T ...
Page 19: ...19 48 FDR 3G OF ...
Page 20: ...20 48 FDR 3G OF ...
Page 23: ...23 48 FDR 3G OF ...
Page 24: ...24 48 FDR 3G OF ...
Page 27: ...27 48 FDR 3G OF ...
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Page 31: ...31 48 FDR 3G OF ...
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Page 48: ...Systemair DESIGN 2020 10 23 HandBook_FDR_3G_OF_en GB 8519DCD0 0720 11EB DCA1 21ABDD8D93BC ...