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B. Nominal base dimension (mm)
H. Nominal height dimension (mm)
1. Ceiling contact installation
2. Corner room installation
3. Plasterboard infill panel, thickness 12,5 mm
4. Installation wall
5. Ceiling or floor
6. Side vertical wall
EI 90 S Installation within vertical light wall (gypsum blocks wall)
The WKS25 fire dampers classified EI 90 S within vertical light walls
built with gypsum blocks "carreaux de plâtre", guarantee fire and
heat sealing for 90 minutes only if installed inside walls with a mini-
mum fire resistance class of EI 90, minimum thickness of 70 mm and
minimum density of 995 kg/m³.
In accordance with standard EN 1366-2 (Article 13.7) the results of
the tests are extended to thicker or higher density walls.
Comply with the minimum distances indicated on section Minimum
distances
Wall opening
A rectangular opening must be provided in the wall with a side 50
mm greater than the nominal size of the fire damper.
It is advisable not to exceed by more than 10 mm from the indicated
sizes so as not to compromise the correct thermal insulation.
Damper positioning
Lift the fixing flaps located on the fire damper casing. See section
Fixing flaps for further details.
Position the damper in the opening so that the side of the closing
mechanism extends from the wall by 202 mm.
Be careful not to damage the intumescent gasket on the outside the
casing.
Secure the fire damper to the wall using four screws on the four holes
of the fixing flaps.
The double test (with the mechanism inside and outside the fire
area) demonstrated that there is no preferred direction for the po-
sition of the damper, both in relation to air flow and the side with
the higher probability of exposure to fire, as indicated in standard
EN1366-2 (paragraph 6.2).
Filling
It is not necessary to insert any material, but simply cover the gap
between the damper and the wall by applying on face of the wall
mechanism side a layer of plasterboard, to a total minimum thickness
of 12,5 mm, to make a frame 100 mm wide.
B. Nominal base dimension (mm)
H. Nominal height dimension (mm)
1. Plasterboard infill panel, thickness 12,5 mm
2. Self-drilling screw Ø 3,5 X 45 mm
EI 120 S Installation within vertical light wall (gypsum blocks wall)
The WKS25 fire dampers classified EI 120 S within vertical light walls
built with gypsum blocks “carreaux de plâtre”, guarantee fire and heat
sealing for 120 minutes only if installed inside walls with a minimum
fire resistance class of EI 120, minimum thickness of 100 mm and
minimum density of 995 kg/m³.
In accordance with standard EN 1366-2 (Article 13.7) the results of
the tests are extended to thicker or higher density walls.
Comply with the minimum distances indicated on section Minimum
distances
Single fire damper wall opening
A rectangular opening must be provided in the wall with a side 50
mm greater than the nominal size of the fire damper.
It is advisable not to exceed by more than 10 mm from the indicated
sizes so as not to compromise the correct thermal insulation.
Paired fire dampers wall opening
A rectangular opening must be provided in the wall with a side 50
mm greater than the nominal size of the paired fire dampers:
– Vertically paired fire dampers
base = damper base + 50 mm
height = h h 45 mm + 50 mm
– Side by side paired fire dampers
base = base1 + base2 + 45 mm + 50 mm
height = damper 50 mm.
It is advisable not to exceed by more than 10 mm from the indicated
sizes so as not to compromise the correct thermal insulation.
Damper positioning
Lift the fixing flaps located on the fire damper casing. See section
Fixing flaps for further details.
Position the damper in the opening so that the side of the closing
mechanism extends from the wall by 185 mm.
Be careful not to damage the intumescent gasket on the outside the
casing.
Secure the fire damper to the wall using four screws on the four holes
of the fixing flaps.
The double test (with the mechanism inside and outside the fire
area) demonstrated that there is no preferred direction for the po-
sition of the damper, both in relation to air flow and the side with
the higher probability of exposure to fire, as indicated in standard
EN1366-2 (paragraph 6.2).
Filling
It is not necessary to insert any material, but simply cover the gap
between the damper and the wall by applying on face of the wall
mechanism side a layer of plasterboard, to a total minimum thickness
of 12,5 mm, to make a frame 100 mm wide.
