Schako BKA-U Service manual

SCHAKO KG Phone [phone]
Steigstraße 25-27 Fax [phone]
D-78600 Kolbingen schako.com | [e-mail]
Fig.: BKA-U with B10 actuator and smoke detection system RMS
USABILITY CERTIFICATE
•General type approval (aBG)
Z-6.50-2012
CONSTRUCTION PRODUCTS TO BE USED IN
COMPLIANCE WITH GENERAL TYPE APPROVAL
•Fire damper model BKA-EN according to DIN EN
15650
•Smoke detection system type RMS in compliance
with general building supervisory approval (abZ)
no. Z-78.6-58
PERFORMANCE DATA
•To close the openings in fire-resistant walls
and ceilings
SPECIAL FEATURES
•Extensive uses and applications
•Large free cross-sections
BKA-Ü
Fire-resistant damper
of special design and application
Technical Documentation
"Installation, Mounting and Operating Instructions"

Fire-resistant damper model BKA-Ü
Technical documentation
Table of Contents
Construction subject to change
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TABLE OF CONTENTS
Table of Contents........................................................ 2
Description.................................................................. 3
Models and dimensions.............................................. 4
Installation in solid walls............................................. 8
Wet installation of a fire damper, complete mortar
lining ........................................................................... 8
Wet installation of two fire dampers at a reduced
distance or "flange-to-flange" .................................... 8
Wet installation with partial mortar lining ................. 9
Dry installation with soft seal ..................................... 9
Installation in solid ceilings....................................... 11
Wet installation of a fire damper, complete mortar
lining ......................................................................... 11
Installation at a reduced distance "flange to flange" 11
Wet installation with concrete base......................... 12
Installation in lightweight partition walls with metal
posts ......................................................................... 14
Lightweight partition walls with panelling on both
sides and wall thickness W ≥ 100 mm ...................... 14
Wet installation of a fire damper, complete mortar
lining ......................................................................... 14
Dry installation of the damper.................................. 16
Dry installation with installation frame type ER-A1.. 17
Dry installation with soft seal ................................... 20
Lightweight partition walls (F30/F60) with panelling on
both sides and wall thickness W ≥ 75 mm................ 22
Dry installation of the damper.................................. 22
Lightweight partition walls with panelling on one side
and wall thickness W ≥ 125 mm ............................... 23
Wet installation of the damper ................................ 23
Installation information ............................................ 24
Suspension of BKA-Ü ................................................ 24
General ..................................................................... 24
Technical data........................................................... 25
Spring return actuators............................................. 26
Smoke detection system RMS .................................. 29
Add-on parts ............................................................. 30
Order code................................................................ 32
Specification texts..................................................... 33
Commissioning and maintenance............................. 34
Foreign branch offices .............................................. 39
List of figures/tables ................................................. 40

Fire-resistant damper model BKA-Ü
Technical documentation
Description
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DESCRIPTION
Fire-resistant dampers of special design and application are
used if, as part of ventilation planning, openings are required
in fire-resistant inner walls or ceilings for the air intake, they
must be closed in the event of a fire.
The competent building supervisory authority will decide
whether the opening is admissible, for example because it
differs or in connection with the approval of the fire protec-
tion concept.
The required dampers are fire-resistant
dampers which are closed in case of fire driven by a suitable
smoke detecting triggering device in the event of a fire, thus,
preventing the propagation of fire and smoke through the
component opening. Dampers of this type may not be con-
nected to ventilation ducts in connection with RLT systems in
buildings.
The general type approval (aBG) Z-6.50-2012 in its currently
valid form, the installation, mounting and operating instruc-
tions and the relevant national standards and directives must
be observed in connection with this technical documentation.
The standard fire-resistant damper BKA-Ü consists of the fol-
lowing components (fitted or wired ex works):
SCHAKO Fire damper BKA-EN with CE marking and Decla-
ration of Performance (DoP) in accordance with the Con-
struction Products Ordinance, housing made of galva-
nised sheet steel with spring return actuator 24 V.
SCHAKO Mounting part type EBT, galvanised sheet steel
model (painted black matt on the inside).
SCHAKO Finishing protective grating type ASG on both
sides, galvanised sheet steel model (operator side:
painted black matt).
SCHAKO Extension piece type VT, galvanised sheet steel
model, required for H ≥ 400.
SCHAKO Smoke detection system type RMS, in compli-
ance with general building supervisory approval
(abZ)/general type approval (aBG) no. Z-78.6-58
Installation is performed in interior walls (horizontal position
of the damper blade axle) and ceilings. In doing so, the gen-
eral building supervisory approval (aBG) no. Z-6.50-2012, the
Declaration of performance (DoP) of BKA-EN and the general
building supervisory approval (abZ) / general type approval
(aBG) no. Z-78.6-58 and the associated technical documenta-
tion must be observed. For the installation in solid ceilings,
the dimensions of BKA-Ü are limited to W and H = 500 mm.
For wall installation, the smoke detector (type RMSII-L) must
always be installed above (W side) in the assembly part type
EBT.
For functional tests, servicing, etc., it is mandatory to provide
on-site inspection openings in suspended ceilings, shaft walls
etc. They must be built in sufficient numbers and size and
must not impair the functioning of the fire-resistant
damper(s).
Attention
Building systems have to be arranged, installed, changed and
maintained in such a way that they prevent fire and propaga-
tion of fire and smoke (fire propagation) and allow evacuation
of people and animals as well as efficient fire extinguishing
work.

Fire-resistant damper model BKA-Ü
Technical documentation
Models and dimensions
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MODELS AND DIMENSIONS
Dimensions
Figure 1: Dimensions BKA-Ü
1 Fire-Resistant Damper Model BKA-Ü
2 Assembly part type EBT (painted black matt on the
inside)
3 Extension piece type VT (required for H ≥ 400)
4 Finishing protective grating type ASG
(operator side: painted black matt)
5 Spring return actuator 24 V
6 Smoke detector RMSII-L
7 Relay module RM
8 Protective cover
Legend
B [mm] = Width
H [mm] = Height
L [mm] = Length
ρ[kg/m³] = Density
min. = at least
max. = maximum
bzw. = or
approx. = approximately

Fire-resistant damper model BKA-Ü
Technical documentation
Models and dimensions
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Available sizes [mm]
Width (B)
Height (H)
200
200
225
225
250
250
275
275
300
300
325
325
350
350
375
375
400
400
450
450
500
500
550
550
600
600
650
650
700
700
750
750
800
800
900
1000
1100
1200
1300
1400
1500
Table 1: Available sizes
All heights and widths which can be combined are available!
Drive unit always on the H side of the fire-resistant damp-
ers.
Inspection openings always on the W side of the fire-re-
sistant dampers.
On request, the width and height dimensions are available
in steps of 10 mm.
For wall installation, the smoke detector (type RMSII-L)
must always be installed above (B side) in the assembly part
type EBT.
H
[mm]
L1
[mm]
L
[mm]
L2
[mm]
Total length
[mm]
200
180
500
-
680
225
250
275
300
325
350
375
400
180
860
450
500
550
600
650
700
750
800
210
210
920
Table 2: Length specifications
Available at an extra charge
Stainless steel model with material no. 1.4301
(V2A) or 1.4571 (V4A - All replaceable, non-
coated parts are made of stainless steel mate-
rial no. 1.4301 (V2A)).
Note: EBT painted in black matt on the inside,
ASG painted in black matt on operator side.
Model with DD coating (solvent-containing two-
component top coat based on polyurethane
varnish - RAL 7035 /light grey) inside and out-
side (replaceable, non-coated parts and the U-
profile of the damper blade are made of stain-
less steel material no. 1.4301).
Note: EBT painted in black matt on the inside,
ASG painted in black matt on operator side.
Table 3: Overview of housing designs

Fire-resistant damper model BKA-Ü
Technical documentation
Models and dimensions
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Use
BKA-Ü can be fitted as shown in the following table.
Use
Installa-
tion
Material/Model
Minimum
thickness
[mm]
Minimum distance
[mm]
Fire resistance
class BKA-EN
Notes
Page °
WALL 3)
solid;
apparent
density ≥450
kg/m³
in
Wet installation in, for example, concrete;
masonry according to EN 1996 or DIN
1053; solid plaster wall boards according to
EN 12859
100
next to each other:
70 1) 2)
EI 90 (ve, i↔o) S
8
Dry installation with Hilti soft seal system
in, for example, concrete; masonry accord-
ing to EN 1996 or DIN 1053; solid plaster
wall boards according to EN 12859 6)
100
next to each other:
200 2)
EI 90 (ve, i↔o) S
9
Lightweight
partition
wall;
classification
according to
EN 13501-2
or similar
national
standards
in
Wet or dry installation in lightweight parti-
tion walls with metal posts and panelling
on both sides 6)
100
next to each other:
200 2)
EI 90 (ve, i↔o) S
14
Dry installation with additional installation
frame type ER-A1 in lightweight partition
walls with metal posts and panelling on
both sides 6)
100
next to each other:
200 2)
EI 90 (ve, i↔o) S
17
Dry installation with Hilti soft seal system in
lightweight partition walls with metal posts
and panelling on both sides 6)
100
next to each other:
200 2)
EI 90 (ve, i↔o) S
20
Dry installation in lightweight partition
walls with metal posts and panelling on
both sides 6)
75
next to each other:
200 2)
EI 30 (ve, i↔o) S
EI 60 (ve, i↔o) S
22
Wet installation in lightweight partition
walls with metal posts and panelling on
one side 6)
125
next to each other:
200 2)
EI 90 (ve, i↔o) S
23
CEILING
4)
solid;
apparent
density ≥500
kg/m³
in
Wet installation in, for example, concrete;
aerated concrete
125
from one another:
70 2)
EI 90 (ho, i↔o) S
11
Wet installation with concrete base in, for
example, concrete; aerated concrete 5)
125
from one another:
70 2)
EI 90 (ho, i↔o) S
12
Table 4: Usability
Additional note:
It may also be installed in walls or ceilings of a lower fire resistance class. In this case, however, the fire resistance class of the fire
dampers is reduced accordingly. The conditions listed above must be taken into account.
1) If mineral wool is used between the fire-resistant dampers, the distance between them is 80 mm.
2) Distances to the wall or ceiling see Figure 2 on page 7
3) For wall installation, the smoke detector must always be installed above in the assembly part type EBT with the damper blade axle
in the horizontal position.
4) When installing in solid ceilings, the dimensions of the fire-resistant dampers BKA-Ü are limited to W and H = 500 mm.
5) Installation only in combination with a concrete base still to be made on site.
6) For each fire-resistant damper, a separate installation opening must be provided.

Fire-resistant damper model BKA-Ü
Technical documentation
Models and dimensions
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General information
During mounting or installation, there is a risk of injuries.
To avoid any possible injuries, personal protective equip-
ment (PPE) must be worn.
Fire-resistant dampers must be installed such that exter-
nal forces do not impair their continuous functioning.
During mounting it may be required to provide reinforce-
ments for the housing or the like.
The requirement of statically load-bearing lintels may
have to be taken into consideration.
If a fire-resistant damper is not filled with mortar on all
four sides, installation and mounting aids on site must be
removed.
Improper transport/handling may result in damage/func-
tional impairment. In addition to that, the film of the
transport packaging must be removed and the delivery in-
spected for completeness.
In storage, fire-resistant dampers must be protected from
dust, dirt, moisture and the effects of temperature (e.g.
direct sunlight, heat-emitting light source etc.). They must
not be exposed to direct effects of the weather and must
not be stored below -20 C or above 50 C.
The fire-resistant dampers must be protected from soiling
and damage. After installation is complete, any dirt must
be removed immediately.
Enough space must be provided for installation, mortar
lining, etc.
Perform a functional check of the fire-resistant dampers
before and after mounting and ensure ready access.
Electrical installation or work on electrical components
may only be carried out by skilled electricians. The supply
voltage must be switched off when performing this work
and secured against being switched on again.
We point out that only suitable cleaning materials may be
used for cleaning the fire-resistant damper in stainless
steel design!
The construction company which has built the fire
damper must provide a confirmation for each building
project to verify its conformity with the general type ap-
proval (see § 16 a Section. 5, 21 Section 2 of model buil-
ding regulation).
The confirmation must be executed in writing and must
include at least the following information:
- Z-6.50-2012
- fire-resistant damper, type "BKA-Ü",
of special design and application
- Name and address of the construction company
- Designation of the building
- Date of construction /date of completion
- Place and date of issue and
signature of the person responsible
This declaration of compliance has to be handed over to
the building owner for possible forwarding to the respon-
sible building supervision authority.
Sample of a certificate of conformity see page 38
Minimum distances or projecting ends
The dimensions given must be considered an installation rec-
ommendation for the BKA-Ü and may differ, depending on the
local situation. The installation must be performed according
to the technical documentation, installation, mounting and
operating instructions in combination with the currently valid
aBG. Pay attention to the accessibility when installing 2 BKA-
Üs next to each other or in the direct vicinity of adjacent com-
ponents. For wall installation, the smoke detector must al-
ways be installed above in the assembly part type EBT with
the damper blade axle in the horizontal position.
Figure 2: Minimum distances to walls, ceilings and to one
another
1) Minimum distance recommended by SCHAKO for suffi-
cient accessibility.
2) The distance between BKA-Ü and the adjacent compo-
nent (wall/ceiling) must be determined according to the
particular installation situation or adjusted to the dimen-
sions of the projecting ends. The minimal dimension of
150 mm in the area of installed RMSII-L must be observed.
3) In solid walls and solid ceilings, installation of no more than
2 BKA-Ü can be effected at a reduced distance "flange-to-
flange". This may lead to a situation in which the inspection
openings are no longer freely accessible. In other installation
situations, the distance may become larger as a result of con-
struction. Sufficient distance between the mounted compo-
nents must be guaranteed.
The projection length x is:
- approx. 90 mm with spring return actuators
- approx. 95 mm with relay module RM
The projection length y is:
- approx. 110 mm with smoke detector RMSII-L
Wet installation (mortar lining)
If the installation of the fire-resistant damper is carried
out by mortar lining, it must be completely filled with
mortar of class M 10 to M 15 according to EN 998-2, or
fire protection mortar of suitable grades, or with concrete
or plaster mortar suitable for the wall or ceiling type.
If the fire-resistant damper is installed during the assem-
bly of the wall/ceiling, the annular gap dimensions can be
smaller than specified.
The mortar bed depth must be designed according to the
minimum wall or ceiling thickness and may not be less
than this thickness.
The mortar lining must be executed such that it is perma-
nent. The information given by the mortar manufacturer
must be observed.

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in solid walls
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INSTALLATION IN SOLID WALLS
Installation in solid walls (shaft walls, shafts, ducts and fire
walls) made of, for example, concrete; masonry according
to EN 1996 or DIN 1053; solid plaster board walls according
to EN 12859; apparent density ≥450 kg/m³ and wall thick-
ness W ≥ 100 mm.
Wet installation of a fire damper, complete mor-
tar lining
The distance of the fire-resistant dampers from one an-
other must be at least 70 mm.
The minimum distance to adjacent components (wall/ceil-
ing) is 40 mm.
Further information to be considered: see page 7 Minimum
distances or projecting ends.
Figure 3: Annular gap dimensions for complete mortar lin-
ing in solid walls
Wet installation of two fire dampers at a re-
duced distance or "flange-to-flange"
Installation of max. two BKA-Üs next to each other in an in-
stallation opening in solid walls at a reduced distance or
"flange-to-flange". All annular gaps have to be filled with mor-
tar (version 1). Alternatively, at a distance of 80 mm from each
other, mineral wool (2x40 mm; non-flammable (EN 13501-1),
melting point ≥ 1000C,   150 kg/m3) can be used as an an-
nular gap seal between the two BKA-Ü (version 2). The min-
eral wool must be applied over the entire length.
The minimum distance to adjacent components (wall/ceil-
ing) is 40 mm.
Further information to be considered: see page 7 Minimum
distances or projecting ends.
The minimum distance to other fire dampers is 200 mm.
Installation next to each other
Figure 4: Installation in solid walls at a reduced distance or
"flange-to-flange", next to each other
(version 1)
(version 2)

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in solid walls
Construction subject to change
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Wet installation with partial mortar lining
Installation on adjacent walls with appropriate annular gap
sizes  50 mm. The annular gap must be closed with non-
flammable mineral wool (EN13501-1, apparent density ≥
150 kg/m³, melting point ≥ 1000 °C) across the entire hous-
ing length of BKA-EN. Apply the mortar up to the adjacent
wall.
Figure 5: Installation of the damper (partial mortar lining) in
solid walls
Dry installation with soft seal
BKA-Ü must be permanently suspended from the solid ceil-
ing on both sides of the wall (see page 24). Suspension an-
gle (pos. 38) for BKA-Ü is available as accessory at an extra
charge.
With an annular gap of 50 - 100 mm, the BKA-Ü must be
installed together with the firestop boards. Mounting of the
firestop boards after installation of the BKA-Ü (installation
dimension 210 mm) is possible starting with an annular gap
of about 100 mm.
For each BKA-Ü, a separate installation opening must be
provided.
The distance between the fire-resistant dampers installed
next to each other must be at least 200 mm.
The minimum distance to adjacent components (wall/ceil-
ing) is 75 mm.
Further information to be considered: see page 7 Minimum
distances or projecting ends
Soft seal system
Permissible soft seal system (provided on site):
Manufacturer Hilti
•Firestop boards CFS-CT B 1S 140/50
•Firestop coating CFS-CT
•Firestop boards CP 673 PF
•Firestop coating CP 673
•Firestop sealant CFS-S ACR
In general, the specifications and processing guidelines of
the soft seal manufacturer (in particular the maximum seal
dimensions) must be observed.
Dimensions of the min./max. annular gap
*) ≙max. seal dimensions according to the manufacturer's
specifications Hilti
Figure 6: Example of installation in soft seal system
Sectional view for wall thickness = 100 mm
Figure 7: Installation in solid wall (wall thickness = 100 mm)
W

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in solid walls
Construction subject to change
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Sectional view for wall thickness > 100 mm
Figure 8: Installation in solid wall (wall thickness > 100 mm)
1 Fire-resistant damper model BKA-Ü
15 Solid wall
16 Solid ceiling
37 Hilti soft seal system (ETA-11/0429):
37.1 Firestop boards CFS-CT B 1S 140/50 or CP 673 PF
37.2 Firestop coating CFS-CT or CP 673
(circumferential width ≥ 25 mm, t ≥ 2.5mm)
37.3 Firestop sealant CFS-S ACR
38 Suspension angle
(Accessories at an extra charge: 1 set = 4 units/BKA-Ü)
39 Suspension (provided on site)
Installation procedure
The BKA-Ü (pos. 1) is installed in the intended installation
opening after the construction of the wall.
The annular gap between the BKA-Ü housing and the reveal
of the installation opening must be min. 50 mm and max.
500 mm. BKA-Ü must be placed in the installation opening
in accordance with the annular gap sizes mentioned above.
The installation dimension of 210 mm on the operating side
has to be compiled with. The annular gap must be sealed
with two layers of firestop boards (pos. 37.1) of the Hilti
soft seal system (see p. 9, among others). With an annular
gap of 50 - 100 mm, the BKA-Ü must be installed together
with the firestop boards.
The firestop boards have to be cut precisely with accurate
contours so that they are positioned tightly over the en-
tire surface. All gaps (between the firestop boards and
the reveal of the installation opening, between the fire-
stop boards and the BKA-Ü) as well as the face area and
the cut surface of the boards themselves must be covered
with the firestop sealant (pos. 37.3) and sealed. In gen-
eral, the specifications and processing guidelines of the
soft seal manufacturer must be observed.
BKA-Ü is suspended from the operating and non-operat-
ing side by means of four angles (pos. 38). The angles are
available as accessories (at an extra charge) and are
mounted on site. For further information on the suspen-
sion, see page 24.
•Once the mounting of the soft seal system is completed,
the firestop coating (pos. 37.2) must be applied circum-
ferentially with a width of ≥ 25 mm and a thickness of
≥2.5mm on the operating and non-operating side of the
BKA-Ü housing.

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in solid ceilings
Construction subject to change
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INSTALLATION IN SOLID CEILINGS
Installation in solid ceilings made, for example, of concrete,
aerated concrete, apparent density ≥ 500 kg/m³ and ceiling
thickness D ≥ 125 mm.
Wet installation of a fire damper, complete mor-
tar lining
The distance of the fire dampers from one another must be
at least 70 mm.
The minimum distance from adjacent components (wall) is
at least 40 mm.
Further information to be considered: see page 7 Minimum
distances or projecting ends.
Figure 9: Annular gap dimensions for complete mortar lin-
ing in solid ceilings
Installation at a reduced distance "flange to
flange"
Installation of max. 2 BKA-Üs next to each other in an installa-
tion opening in solid ceilings at a reduced distance "flange-to-
flange". All annular gaps have to be filled with mortar.
The minimum distance to adjacent components (wall/ceil-
ing) is 40 mm.
Further information to be considered: see page 7 Minimum
distances or projecting ends.
Figure 10: Installation in solid ceilings at a reduced distance
"flange-to-flange"

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in solid ceilings
Construction subject to change
No return possible Version: 2021-07-01 | Page 12
Wet installation with concrete base
•Construction of a circumferential, straight reinforced con-
crete base (concrete grade: C20/25; concrete cover ≥ 35
mm; reinforcement: concrete steel BSt500S or concrete
steel mats B500A). The base must be constructed circum-
ferentially with a wall thickness of at least 100 mm, meas-
ured from the housing of BKA-Ü. The height of the base
must be maintained up to the prescribed installation di-
mension (210 mm). The maximum base height is ≤550
mm.
The damper blade clearance of the installed BKA-Ü must
be guaranteed. Make sure that there is nothing left that
may affect the function of the new fire damper.
During the formation of the concrete base in solid ceilings,
in addition to the constructive anti-crack reinforcement,
it must be ensured that the concrete base is applied di-
rectly to the reinforced concrete ceiling or connected to
the raw ceiling.
Any separating layers (floor coverings, seals, insulations,
floating screeds, etc.) must be removed or must not be
present in this area.
During the construction of the concrete base, make sure
that the housing of BKA-Ü is not pressed inwards (rein-
forcement).
•The clearance between individual BKA-Üs (max. 2) must
be at least 70 mm.
•If an adjacent solid component (wall) is closer than 100
mm to the housing of BKA-Ü, the existing gap to this com-
ponent must be filled as described above. This option be-
comes available if the adjacent component has F90 char-
acteristics.
Figure 11: Installation in solid ceilings with concrete base,
top view
Figure 12:Installation in solid ceilings with concrete base
45 Horizontal reinforcement e.g. bracket (Ø 8; e ≤ 150
mm)
46 Concrete base (concrete C20/25)
47 Splice bars (Ø 8; e ≤ 500 mm; at least 4 pieces/base)
16 Solid ceiling (ceiling thickness D ≥125 mm; ρ≥500 kg/m³)

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in solid ceilings
Construction subject to change
No return possible Version: 2021-07-01 | Page 13
Reinforcement of the reinforced concrete upstand
(Concrete cover ≥ 35 mm; Note: Mounting reinforcement
not drawn):
- Horizontal reinforcement (pos. 45):
closed bracket Ø 8, e ≤ 150 mm or steel bar with appropriate
overlap lengths or equivalent mesh reinforcement (Q335A);
arranged in centre of base (pos. 46).
- Connecting reinforcement to the reinforced concrete ceiling,
if an annular gap is present in the immediate ceiling opening
area, it must be sealed with concrete in the appropriate
grade:
Ø 8, e ≤ 500 mm (splice bar in ceiling, pos. 47) centre of base
(=/=), but at least 4 pieces/base (arranged in the corner areas
of the base).
- Connecting reinforcement to the reinforced concrete ceiling,
if no annular gap is present in the immediate ceiling opening
area.
Ø 8, e ≤ 500 mm (splice bar in ceiling, pos. 47) centre of base
(=/=), but at least 4 pieces/base (arranged in the corner areas
of the base); to be glued into ceiling using, for example, Hilti
HIT HY 200.
Figure 13: Installation in solid ceilings with concrete base, sec-
tion

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in lightweight partition walls with metal posts
Construction subject to change
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INSTALLATION IN LIGHTWEIGHT PARTITION
WALLS WITH METAL POSTS
LIGHTWEIGHT PARTITION WALLS WITH
PANELLING ON BOTH SIDES AND WALL
THICKNESS W ≥ 100 MM
Installation in lightweight partition walls with metal posts
and panelling on both sides (gypsum-bonded wall boards;
wall thickness ≥ 100 mm) according to classification to EN
13501-2 or comparable national standards.
Installation and mounting aids on site must be removed.
Wet installation of a fire damper, complete mor-
tar lining
The minimum distance of BKA-Ü from one another must be
at least 200 mm.
The minimum distance to adjacent components must be
(due to the design) at least 90 mm from the wall and at least
80 mm from the ceiling. The actual minimum distance may
slightly differ from the distances mentioned therein and
must be executed and adapted as a function of the wall con-
nection type.
Further information to be considered: see page 7 Minimum
distances or projecting ends.
Figure 14: Metal posts with required exchange parts for
wet installation (dimensions without reveal)
*When using a reveal (pos. 20; circumferential 12.5 mm), the
opening dimensions (see Figure 14) must increased by 25 mm.
Mounting information:
In the overlap area of the exchangeable profiles, they must be
riveted, crimped or screwed once on both sides. These con-
nections are only for fastening the individual metal profiles
during mounting.
Sectional view of lightweight partition wall without reveal
Detail Y
Sectional view of lightweight partition wall with reveal
Detail X
Figure 15: Wet installation in lightweight partition wall

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in lightweight partition walls with metal posts
Construction subject to change
No return possible Version: 2021-07-01 | Page 15
Installation procedure
Mount the metal posts and the wall in accordance with the
specifications of the wall manufacturer and the required ex-
change parts as shown on Figure 14.
 Provide a recess for the wet installation of BKA-Ü (pos. 1)
From B > 800 mm (with horizontal damper blade axle), on
both B sides of the exchange profiles, 2 bent perforated
plates each (t ≥ 0.5 mm; width x length = 40 x 70 mm), must
be fastened as mortar anchor (pos. 14). They must be
screwed to the metal profiles at the wall centre, using one
dry-wall screw for each plate.
Insert the BKA-Ü into the wall recess (operating side - ob-
serve the installation dimension of 210 mm). Average out
the circumferential annular gap evenly between the wall
and BKA-Ü. Mounting of BKA-Ü with the help of mounting
suspensions etc.
Insert mortar (pos. 13) into the circumferential gap of 40
mm between the BKA-Ü housing and the circumferential
metal profiles (pos. 10). If reveals (pos. 20) are used, a mor-
tar bed depth of 100 mm is sufficient. When using reveals,
the exchange parts must be adjusted to the recess dimen-
sions.
1 Fire-resistant damper model BKA-Ü
9 Profile CW 50/50/06 (with wall thickness = 100 mm, for
larger wall thicknesses, the profiles must be adapted
accordingly)
10 Profile UW 50/40/06 (with wall thickness = 100 mm, for
larger wall thicknesses, the profiles must be adapted
accordingly)
11.1 Mineral wool (according to the wall manufacturer's
specifications)
12 Panelling of the metal post wall made of gypsum-bonded
wall boards
13 Mortar
14 From B>800 mm, 2 mortar anchors for each B side are
required, for installation with horizontal damper blade
axle (perforated plate t ≥0.5 mm; width x length = 40 x
70 mm; accessories at an extra charge).
16 Solid ceiling
20 Reveal, optional
33.1 Dry-wall screws (-on site- e.g. ø 3.5 x 25 mm)
same quantity as mortar anchors (pos. 14)
48 Thermal insulation

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in lightweight partition walls with metal posts
Construction subject to change
No return possible Version: 2021-07-01 | Page 16
Dry installation of the damper
The dry installation must be carried out during the assem-
bly of the wall.
The minimum distance of BKA-Ü from one another must be
at least 200 mm.
The minimum distance to adjacent components must be
(due to the design) at least 90 mm from the wall and at least
80 mm from the ceiling. The actual minimum distance may
slightly differ from the distances mentioned therein and
must be executed and adapted as a function of the wall con-
nection type.
Further information to be considered: see page 7 Minimum
distances or projecting ends.
Figure 16: Metal stud frame with required replacement parts
for dry installation
Sectional view of LPW
Detail W
Figure 17: Dry installation in lightweight partition wall
Installation procedure
Mount the metal posts and the wall in accordance with the
specifications of the wall manufacturer and the required ex-
change parts as shown on Figure 14.
Insert BKA-Ü (pos. 1) into the wall recess (operating side -
observe the installation dimension of 210 mm). Average out
the circumferential annular gap evenly between the wall
and BKA-Ü. Mounting of BKA-Ü with the help of mounting
suspensions etc.
Insert mineral wool (pos. 11.3) (non-flammable according to
EN 13501-1, packing density 80 kg/m³, melting point ≥
1000 °C) into the circumferential gap 40 mm in width be-
tween the housing of BKA-Ü and the circumferential metal
profiles (pos. 10).
Mount the wall panellings on both sides (pos. 12) and the
doublings on the non-operating side (pos. 49.1). The con-
nection and butt joints must be filled with the jointing ma-
terial of the wall (pos. 43; max. gap width 5 mm, perform
jointing operation as part of assembly).
1 Fire-resistant damper model BKA-Ü
9 Profile CW 50/50/06 (with wall thickness = 100 mm, for
larger wall thicknesses, the profiles must be adapted
accordingly)
10 Profile UW 50/40/06 (with wall thickness = 100 mm, for
larger wall thicknesses, the profiles must be adapted
accordingly)
11.1 Mineral wool (according to the wall manufacturer's
specifications)
11.3 Mineral wool, (non-flammable according to EN13501-1,
apparent density approx. 80 kg/m³, melting point ≥1000
°C, thickness 40 mm)
12 Panelling of the metal post wall made of gypsum-bonded
wall boards
16 Solid ceiling
43 Joint filling with jointing material of the wall
48 Thermal insulation
49.1 Doubling (plaster boards GKF, 2 x d=12.5 mm)
oFirst doubling, fastening: Dry-wall screws e.g. TN
3.5x55, a ≤ 250 mm, but at least 2 screws per side; con-
nection and butt joints of the doublings must be filled
with the wall material.
oSecond doubling, fastening: Dry-wall screws e.g. TN
4.5x70, a ≤ 250 mm, but at least 2 screws per side; con-
nection and butt joints of the doublings must be filled
with the wall material.

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in lightweight partition walls with metal posts
Construction subject to change
No return possible Version: 2021-07-01 | Page 17
Dry installation with installation frame type ER-
A1
The clearance between individual BKA-Üs must be at least
200 mm. The installation must be carried out in separate
installation openings. Fixing lugs (W=30 mm) may have to
be offset by at least 15 mm.
The minimum distance to adjacent components must be
(due to the construction) at least 110 mm (wall/ceiling). The
actual minimum distance may slightly differ from the dis-
tances mentioned therein and must be executed and
adapted as a function of the wall connection type.
Further information to be considered: see page 7 Minimum
distances or projecting ends.
The ER-A1 installation frame is to be ordered as an acces-
sory (extra charge) –supplied loose or factory-mounted.
Figure 18: Metal stud frame with required replacement
parts at W ≤ 125 mm and 1 layer of circumferential reveal
(12.5 mm) for BKA-Ü with ER-A1 installation frame
Mounting information:
In the overlap area of the exchangeable profiles, they must be riveted,
crimped or screwed once on both sides. These connections are only
for fastening the individual metal profiles during mounting.
Figure 19: Metal stud frame with required replacement
parts at W > 125 mm and 2 layers of circumferential reveal
(2x12.5 mm) for BKA-Ü with ER-A1 installation frame
Figure 20: Representation of the internal dimension for in-
stallation of the BKA-Ü with ER-A1 installation frame
Dry installation (with installation frame type ER-
A1)
Figure 21: BKA-Ü with installation frame type ER-A1 and
shown fixing lugs (in the figure: width (B) x height (H) 400 x
400 mm)

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in lightweight partition walls with metal posts
Construction subject to change
No return possible Version: 2021-07-01 | Page 18
Examples of number and positioning:
Number of fixing lugs per side dimension [mm]
1 fixing lug/side
<
400
2 fixing lugs/side
≥
400 to
≤
865
3 fixing lugs/side
>
865
Table 5: Number of fixing lugs per side for ER-A1
Figure 22: Examples of fixing lug number and positioning
for installation frame type ER-A1
Figure 23: BKA-Ü with installation frame type ER-A1 in light-
weight partition wall
Figure 24: Dry installation in lightweight partition wall (F90)
W ≤ 125, with ER-A1 installation frame
Figure 25: Dry installation in lightweight partition wall (F90)
W ≤ 125, with ER-A1 installation frame
200
x
200
400
x
400
870
x
800

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in lightweight partition walls with metal posts
Construction subject to change
No return possible Version: 2021-07-01 | Page 19
Figure 26: Dry installation in lightweight partition wall (F90)
W > 125, with ER-A1 installation frame
Figure 27: Dry installation in lightweight partition wall (F90)
W > 125, with ER-A1 installation frame
Installation procedure
•Prepare the metal posts and the wall in accordance with the
specifications of the wall manufacturer and the required ex-
change parts as shown on Figure 18 or Figure 19, page 17.
Leave a recess for installing the BKA-Ü with installation
frame type ER-A1 (pos. 17).
Construct a circumferential reveal (pos. 20) with 12.5 mm
or 2 x 12.5 mm plasterboards and screw them centrally to
the circumferential metal profile frame (pos. 33.2 - fas-
tening: e.g. drywall screws ø 3.5 x 25 mm or ø 3.5 x 45 mm;
screw distance ≤ 250 mm, but at least 2 screws per side).
Insert the BKA-Ü into the wall recess (dimensions: B+93+2
mm x H+93+2 mm), so that the stop of the installation frame
type ER-A1 contacts the wall (operating side –observe the
installation dimensions of 210 mm up to the front edge of
the wall, seeFigure 24). Average out the circumferential an-
nular gap evenly between the wall recess and the installa-
tion frame type ER-A1. Mounting of BKA-Ü with the help of
mounting suspensions etc.
BKA-Ü is fastened on all sides to the supporting structure
(exchange profiles –pos. 10) using the appropriate number
of fixing lugs (pos. 18; see table 5). The fixing lugs are fas-
tened to the supporting structure using 2 drywall screws
each (pos. 19 e.g. ø 3.5x35 mm; adjust screw length to pan-
elling thickness).
9 Profile CW 50/50/06 (with wall thickness = 100 mm, for
larger wall thicknesses, the profiles must be adapted
accordingly)
10 Profile UW 50/40/06 (with wall thickness = 100 mm, for
larger wall thicknesses, the profiles must be adapted
accordingly)
11.1 Mineral wool (according to the wall manufacturer's
specifications)
12 Panelling (on both sides) of the metal stud wall made of
gypsum-bonded wall boards
16 Solid ceiling
17 ER-A1 installation frame (as accessory at an extra
charge: supplied loose as a mounting kit or factory-
assembled).
17.1 + 17.3 B side Parts 1 and 2
17.2 + 17.4 H side parts 1 and 2
17.5 Countersunk head screw 4.5 x 20 mm
(8 pieces)
17.6 Corner angle ER-A1 (4 pieces)
18 Fixing lugs (included in the scope of delivery of
installation frame type ER-A1)
19 Drywall screws (-on site- 2 x / fixing lug;
e.g. ø 3.5 x 35mm)
20 Circumferential reveal (on site) screwed to metal stud
profiles, depending on the wall thickness (12.5 mm GRP
panels for wall thickness W ≤125 mm / for W > 125 mm
two layers of reveal (2 x 12.5 mm) are required)
33.2 Drywall screws (-on site- for example, ø 3.5 x 25mm;
screw distance ≤ 250 mm but at least
2 screws per side)

Fire-resistant damper model BKA-Ü
Technical documentation
Installation in lightweight partition walls with metal posts
Construction subject to change
No return possible Version: 2021-07-01 | Page 20
Dry installation with soft seal
BKA-Ü must be permanently suspended from the solid ceil-
ing on both sides of the wall (see page 24). Suspension an-
gle (pos. 38) for BKA-Ü is available as accessory at an extra
charge.
With an annular gap of 50 - 100 mm, the BKA-Ü must be
installed together with the firestop boards. Mounting of the
firestop boards after installation of the BKA-Ü (installation
dimension 210 mm) is possible starting with an annular gap
of about 100 mm.
For each BKA-Ü, a separate installation opening must be
provided.
The distance from one BKA-Ü to another must be at least
200 mm.
Depending on the wall thickness, the minimal distance to
adjacent components is, due to the design, at least approx.
103/115 mm from the ceiling and approx. 113/125 mm
from the wall. The actual minimum distance may slightly
differ from the distances mentioned therein and must be
executed and adapted as a function of the wall connection
type.
Further information to be considered: see page 7 Minimum
distances or projecting ends.
Soft seal system
Permissible soft seal system (provided on site):
Manufacturer Hilti
•Firestop boards CFS-CT B 1S 140/50
•Firestop coating CFS-CT
•Firestop boards CP 673 PF
•Firestop coating CP 673
•Firestop sealant CFS-S ACR
In general, the specifications and processing guidelines of
the soft seal manufacturer (in particular the maximum seal
dimensions) must be observed.
Dimensions of the min./max. annular gap
*) ≙max. seal dimensions according to the manufacturer's specifica-
tions Hilti
Figure 28: Example of installation in soft seal system
Wall thickness = 100 mm
*) ≙max. seal dimensions according to the manufacturer's specifica-
tions Hilti
Figure 29: Metal stud frame plus required replacement parts
(for wall thickness = 100 mm)
Mounting information:
In the overlap area of the exchangeable profiles, they must
be riveted, crimped or screwed once on both sides. These
connections are only for fastening the individual metal pro-
files during mounting.
Sectional view for wall thickness = 100 mm
Figure 30: Installation in metal stud wall (wall thickness = 100 mm)