Note
The fire damper must have a fire protection coating (50 mm) on the installation side. The spigot of the fire
damper must not be coated. This is why the fire damper requires an extension piece on the installation
side; alternatively, the fire damper can be connected to the ductwork before the coating is applied.
4. Completely close off the perimeter gap between the fire damper and the wall or ceiling slab with two layers of
coated mineral wool slabs, ≥ 140 kg/m³. Apply fire protection sealant to the cut faces of the mineral wool slabs
and fit them tightly into the opening. Seal any gaps between the mineral wool slabs and the trim panels, gaps
between the cut faces of cut-to-size pieces, and gaps between slabs and the fire damper by applying fire pro-
tection sealant.
5. Apply fire protection coating to joints, transitions, and any imperfections on the pre-coated mineral wool slabs.
6. Apply fire protection coating, at least 2.5 mm thick, to the fire damper casing perimeter on both sides of the
wall or ceiling slab. The actuator and release unit must not be coated.
5.5.4
Mortar-based installation into concrete bases
D
≤ 750 220
≥ 150
D
≤ 500 220
≥ 100
①
②
③
④
①
②
③
④
࿆
࿆
࿇
࿇
⑤
⑤
Fig. 14: Installation with concrete base into solid ceiling slab
①
Solid ceiling slab
②
Concrete base
③
Reinforcement
④
Duct
Ⓐ
Installation side
Ⓑ
Operating side
Installation after completing the ceiling slab
Personnel:
Specialist personnel
Requirements
Performance class EI 120 S
Solid ceiling slabs without open spaces, made of concrete or aerated concrete, gross density ≥ 600 kg/m³ and
D ≥ 150 mm
45 mm minimum distance between two fire dampers
≥ 75 mm distance to load-bearing structural elements
1. Attach the new fire damper to the old fire damper
2. Create concrete base, for a reinforcement plan see Fig. 15.
No reinforcement is required for bases with a height of ≤ 50 mm.
Installation
Solid ceiling slabs > Mortar-based installation into concrete bases
Fire damper Type FKRS-EU 25
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