Trox Technik FK2-EU User manual

Fire damper
Type FK2-EU
Installation and operating manual
Read the instructions prior to performing any task!
according to Declaration of Performance
DoP / FK2-EU / DE / 002
GB/en

A00000092715, 1, GB/en
Translation of the original
© 2021
TROX GmbH
Heinrich-Trox-Platz
47504 Neukirchen-Vluyn, Germany
Germany
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Internet: http://www.troxtechnik.com
03/2022
Fire damper Type FK2-EU
2

General information
About this manual
This operating and installation manual enables oper-
ating or service personnel to correctly install the TROX
product described below and to use it safely and effi-
ciently.
This operating and installation manual is intended for
use by fitting and installation companies, in-house tech-
nicians, technical staff, instructed persons, and qualified
electricians or air conditioning technicians.
It is essential that these individuals read and fully under-
stand this manual before starting any work. The basic
prerequisite for safe working is to comply with the safety
notes and all instructions in this manual.
The local regulations for health and safety at work and
general safety regulations also apply.
This manual must be given to the system owner when
handing over the system. The system owner must
include the manual with the system documentation. The
manual must be kept in a place that is accessible at all
times.
Illustrations in this manual are mainly for information
and may differ from the actual design.
Copyright
This document, including all illustrations, is protected by
copyright and pertains only to the corresponding
product.
Any use without our consent may be an infringement of
copyright, and the violator will be held liable for any
damage.
This applies in particular to:
Publishing content
Copying content
Translating content
Microcopying content
Saving content to electronic systems and editing it
TROX Technical Service
To ensure that your request is processed as quickly as
possible, please keep the following information ready:
Product name
TROX order number
Delivery date
Brief description of the fault
Online www.troxtechnik.com
Phone [phone]
Limitation of liability
The information in this manual has been compiled with
reference to the applicable standards and guidelines,
the state of the art, and our expertise and experience of
many years.
The manufacturer does not accept any liability for dam-
ages resulting from:
Non-compliance with this manual
Incorrect use
Operation or handling by untrained individuals
Unauthorised modifications
Technical changes
Use of non-approved replacement parts
The actual scope of delivery may differ from the infor-
mation in this manual for bespoke constructions, addi-
tional order options or as a result of recent technical
changes.
The obligations agreed in the order, the general terms
and conditions, the manufacturer's terms of delivery,
and the legal regulations in effect at the time the con-
tract is signed shall apply.
We reserve the right to make technical changes.
Warranty claims
The provisions of the respective general delivery terms
apply to warranty claims. For purchase orders placed
with TROX GmbH, these are the regulations in section
"Vl. Warranty claims" of the Delivery Terms of TROX
GmbH, see www.trox.de/en/ .
General information
Fire damper Type FK2-EU 3

Safety notes
Symbols are used in this manual to alert readers to
areas of potential hazard. Signal words express the
degree of the hazard.
Comply with all safety instructions and proceed carefully
to avoid accidents, injuries and damage to property.
DANGER!
Imminently hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING!
Potentially hazardous situation which, if not avoided,
may result in death or serious injury.
CAUTION!
Potentially hazardous situation which, if not avoided,
may result in minor or moderate injury.
NOTICE!
Potentially hazardous situation which, if not avoided,
may result in property damage.
ENVIRONMENT!
Environmental pollution hazard.
Tips and recommendations
Useful tips and recommendations as well as informa-
tion for efficient and fault-free operation.
Safety notes as part of instructions
Safety notes may refer to individual instructions. In this
case, safety notes will be included in the instructions
and hence facilitate following the instructions. The
above listed signal words will be used.
Example:
1. Loosen the screw.
2.
CAUTION!
Danger of finger entrapment when closing
the lid.
Be careful when closing the lid.
3. Tighten the screw.
Specific safety notes
The following symbols are used in safety notes to alert
you to specific hazards:
Warning signs Type of danger
Warning – danger zone.
General information
Fire damper Type FK2-EU4

1 Safety ................................................................ 7
1.1 General safety notes ................................. 7
1.2 Correct use ................................................ 7
1.3 Qualified staff ............................................. 8
2 Technical data .................................................. 9
2.1 General data .............................................. 9
2.2 FK2-EU with fusible link ........................... 11
2.3 FK2-EU with spring return actuator ......... 14
2.4 FK2-EU with spring return actuator and
duct smoke detector ................................ 21
2.5 FK2-EU with fusible link and cover grille
as air transfer unit .................................... 22
2.6 FK2-EU with spring return actuator and
duct smoke detector as air transfer
damper .................................................... 23
3 Supply package, transport and storage ...... 25
4 Parts and function ......................................... 26
4.1 Function in the ventilation system ........... 26
4.2 FK2-EU with fusible link .......................... 26
4.3 FK2-EU with spring return actuator ......... 26
4.4 FK2-EU with spring return actuator and
duct smoke detector ................................ 27
4.5 FK2-EU with fusible link and cover grille
as air transfer unit .................................... 27
4.6 FK2-EU with spring return actuator and
duct smoke detector as air transfer
damper .................................................... 28
5 Installation ...................................................... 29
5.1 Installation situations ............................... 29
5.2 Safety notes regarding installation .......... 33
5.3 General installation information ............... 33
5.3.1 Installation kit ES – supply package and
assembly .............................................. 47
5.3.2 Installation kit E3 – supply package and
assembly .............................................. 50
5.3.3 Installation kit EW – supply package and
assembly .............................................. 53
5.3.4 Installation kit GM – supply package and
assembly .............................................. 56
5.3.5 Installation kit WA – supply package and
assembly .............................................. 57
5.3.6 Installation kit WE – supply package and
assembly .............................................. 61
5.3.7 Installation kit WE 120 – assembly (by
others) .................................................. 64
5.3.8 Installation kit GL – supply package and
assembly .............................................. 66
5.4 Solid walls ............................................... 69
5.4.1 General ................................................. 69
5.4.2 Mortar-based installation ...................... 70
5.4.3 Mortar-based installation – multiple
installation into one installation opening
............................................................... 74
5.4.4 Mortar-based installation – 4 dampers
with a common duct ............................. 76
5.4.5 Mortar-based installation with partial
mortaring .............................................. 79
5.4.6 Dry mortarless installation into a solid
wall with existing installation subframe
E1/E2 and installation kit E3 ................. 80
5.4.7 Dry mortarless installation into a solid
wall, with installation kit EW ................. 81
5.4.8 Mortar-based installation with flexible
ceiling joint ............................................ 83
5.4.9 Dry mortarless installation on the face of
a solid wall, with installation kit WA ...... 86
5.4.10 Dry mortarless installation remote from
solid walls with installation kit WE ...... 89
5.4.11 Dry mortarless installation remote from
solid walls with installation kit WE 120
and mineral wool ................................. 93
5.4.12 Dry mortarless installation with fire batt
............................................................ 95
5.5 Lightweight partition walls ....................... 97
5.5.1 General ................................................. 97
5.5.2 Mortar-based installation .................... 103
5.5.3 Mortar-based installation – multiple
installation into one installation opening
............................................................ 109
5.5.4 Mortar-based installation – 4 dampers
with a common duct ............................ 111
5.5.5 Dry mortarless installation with installa-
tion kit ES ............................................ 114
5.5.6 Dry mortarless installation with mineral
wool .................................................... 117
5.5.7 Dry mortarless installation with fire-rated
gypsum board or plasterboard ............ 118
5.5.8 Dry mortarless installation with flexible
ceiling joint and installation kit GL... /
GLK... ................................................. 120
5.5.9 Dry mortarless installation remote from a
lightweight partition wall, with installation
kit WE ................................................. 130
5.5.10 Dry mortarless installation with fire batt
.......................................................... 132
5.6 Lightweight partition walls with timber sup-
port structure or half-timbered construc-
tions ....................................................... 138
5.6.1 General ............................................... 138
5.6.2 Mortar-based installation .................... 141
5.6.3 Mortar-based installation – multiple
installation into one installation opening
............................................................ 150
5.6.4 Mortar-based installation – 4 dampers
with a common duct ........................... 153
5.6.5 Dry mortarless installation with installa-
tion kit ES ........................................... 156
5.6.6 Dry mortarless installation with mineral
wool .................................................... 158
Table of contents
Fire damper Type FK2-EU 5

5.6.7 Dry mortarless installation with fire batt
............................................................ 160
5.7 Solid wood walls .................................... 168
5.7.1 General ............................................... 168
5.7.2 Mortar-based installation .................... 169
5.7.3 Dry mortarless installation with installa-
tion kit ES ........................................... 170
5.7.4 Dry mortarless installation with mineral
wool .................................................... 171
5.7.5 Dry mortarless installation with fire batt
............................................................ 172
5.8 Shaft walls with metal support structure 173
5.8.1 General ............................................... 173
5.8.2 Mortar-based installation .................... 176
5.8.3 Dry mortarless installation with installa-
tion kit ES ........................................... 181
5.9 Shaft walls without metal support structure
................................................................ 183
5.9.1 General ............................................... 183
5.9.2 Dry mortarless installation with installa-
tion kit ES ........................................... 185
5.10 Solid ceiling slabs ................................ 186
5.10.1 General ............................................. 186
5.10.2 Mortar-based installation into solid
ceiling slabs ...................................... 188
5.10.3 Mortar-based installation – multiple
installation into one installation opening
.......................................................... 195
5.10.4 Mortar-based installation into a con-
crete base ......................................... 197
5.10.5 Mortar-based installation into a con-
crete base – multiple installation
opening into one installation opening
.......................................................... 201
5.10.6 Mortar-based installation into hollow
concrete block ceilings ..................... 204
5.10.7 Mortar-based installation into hollow
core slabs ......................................... 205
5.10.8 Mortar-based installation into ribbed
ceilings ............................................. 206
5.10.9 Mortar-based installation into compo-
site ceilings ....................................... 207
5.10.10 Mortar-based installation in conjunc-
tion with wooden beam ceilings ...... 208
5.10.11 Mortar-based installation in conjunc-
tion with solid wood ceilings ............ 209
5.10.12 Mortar-based installation in conjunc-
tion with lightweight ceilings ........... 210
5.10.13 Dry mortarless installation above or
below a solid ceiling slab with installa-
tion kit WA ....................................... 211
5.10.14 Dry mortarless installation remote
from solid ceiling slabs, with installa-
tion kit WE ...................................... 212
5.10.15 Dry mortarless installation with fire
batt ................................................. 216
5.11 Solid wood ceilings .............................. 220
5.11.1 Mortar-based installation into solid
wood ceilings .................................... 220
5.11.2 Dry mortarless installation into solid
wood ceilings, with installation kit ES
........................................................... 221
5.12 Wooden beam ceilings ........................ 222
5.12.1 Mortar-based installation into wooden
beam ceilings ................................... 222
5.12.2 Dry mortarless installation into wooden
beam ceilings, with installation kit
ES ..................................................... 224
5.12.3 Mortar-based installation into historic
wooden beam ceilings ...................... 226
5.13 Fixing the fire damper .......................... 228
5.13.1 General ............................................. 228
5.13.2 Suspending fire dampers installed
remote from solid walls and ceiling
slabs ................................................. 229
5.13.3 Fixing the damper when a fire batt is
used .................................................. 230
6 Accessories ................................................. 233
7 Electrical connection .................................. 236
7.1 General safety notes ............................. 236
7.2 Limit switches (fire dampers with fusible
link) ........................................................ 236
7.3 Spring return actuator ............................ 236
7.4 Spring return actuator and duct smoke
detector RM-O-3-D ................................ 236
8 Functional test ............................................. 237
8.1 General .................................................. 237
8.2 Functional test with automatic control unit
................................................................ 237
8.3 Fire damper with fusible link .................. 238
8.3.1 Fusible link – size 1 ............................ 238
8.3.2 Fusible link – sizes 2 and 3 ................ 239
8.4 Fire damper with spring return actuator 242
8.4.1 Spring return actuator – BFL... / BFN...
............................................................ 242
9 Commissioning ............................................ 244
10 Maintenance ................................................. 245
10.1 General ................................................ 245
10.2 Replacing the fusible link ..................... 246
10.2.1 Fusible link – size 1 .......................... 246
10.2.2 Fusible link – sizes 2 and 3 .............. 247
10.3 Inspection, maintenance and repair
measures ............................................. 248
11 Decommissioning, removal and disposal . 250
12 Nomenclature ............................................... 251
13 Change history ............................................ 256
14 Index.............................................................. 257
Table of contents
Fire damper Type FK2-EU6

1 Safety
1.1 General safety notes
Sharp edges, sharp corners and thin sheet metal
parts
CAUTION!
Danger of injury from sharp edges, sharp cor-
ners and thin sheet metal parts!
Sharp edges, sharp corners and thin sheet metal
parts may cause cuts or grazes.
– Be careful when carrying out any work.
–Wear protective gloves, safety shoes and a hard
hat.
Electrical voltage
DANGER!
Danger of electric shock! Do not touch any live com-
ponents! Electrical equipment carries a dangerous
electrical voltage.
– Only skilled qualified electricians are allowed to
work on the electrical system.
–Switch off the power supply before working on
any electrical equipment.
1.2 Correct use
The fire damper is used as an automatic shut-off
device to prevent fire and smoke from spreading
through ducting.
The fire damper is suitable for supply and extract air
in HVAC systems.
The fire damper may be used in potentially explo-
sive atmospheres if appropriate special accessories
are used with it and if the product bears the CE con-
formity marking according to Directive 94/9/EC. Fire
dampers for use in potentially explosive atmos-
pheres are marked for the zones for which they
have been approved.
Operation of the fire dampers is allowed only in
compliance with installation regulations and the
technical data in this installation and operating
manual.
Modifying the fire damper or using replacement
parts that have not been approved by TROX is not
permitted.
If this fire damper is used in Germany:
Do not use it in extract air systems in commercial
kitchens.
Not to be used as an air transfer damper.
Do not use in combined penetration seal.
Do not use in fire protection block bulkhead.
Approvals under building regulations may be
required for the use of upstream shutters for air
transfer units. This must be checked and applied for
by others.
Flame-resistant, non-dripping building materials
(elastomeric foams) must at least correspond to fire
rating class C - s2, d0 according to the specifica-
tions of MVV TB (since 2019/1). The applicable local
building regulations must be observed.
Incorrect use
WARNING!
Danger due to incorrect use!
Incorrect use of the fire damper can lead to dan-
gerous situations.
Never use the fire damper
–without specially approved attachments in areas
with potentially explosive atmospheres
– as a smoke control damper
– outdoors without sufficient protection against the
effects of weather
– in atmospheres where chemical reactions,
whether planned or unplanned, may cause
damage to the fire damper or lead to corrosion
Safety
Correct use
Fire damper Type FK2-EU 7

1.3 Qualified staff
WARNING!
Danger of injury due to insufficiently qualified
individuals!
Incorrect use may cause considerable injury or
damage to property.
– Only specialist personnel must carry out work.
Personnel:
Skilled qualified electrician
Specialist personnel
Skilled qualified electrician
Skilled qualified electricians are individuals who have
sufficient professional or technical training, knowledge
and actual experience to enable them to work on elec-
trical systems, understand any potential hazards related
to the work under consideration, and recognise and
avoid any risks involved.
Specialist personnel
Specialist personnel are individuals who have sufficient
professional or technical training, knowledge and actual
experience to enable them to carry out their assigned
duties, understand any potential hazards related to the
work under consideration, and recognise and avoid any
risks involved.
Safety
Qualified staff
Fire damper Type FK2-EU8

2 Technical data
2.1 General data
Nominal sizes B × H 200 × 100 – 1500 × 800 mm *
Casing lengths L 305 and 500 mm
Volume flow rate range Up to 14400 l/s or 51840 m³/h
Differential pressure range Up to 2000 Pa
Temperature range 1, 3, 4 -20 °C to 50 °C
Release temperature 472 °C or 95 °C (for warm air ventilation systems)
Upstream velocity 2, 4 ≤ 8 m/s with fusible link,
≤ 12 m/s with spring return actuator
≤ 10 m/s with explosion-proof spring return actuator
Closed blade air leakage EN 1751, Class 2
Casing leakage EN 1751,
L = 305 mm, class C
L = 500 mm, class C; (B + H) ≤ 700, class B
EC conformity Construction Products Regulation (EU) no. 305/2011
EN 15650 – Ventilation for buildings – Fire dampers
EN 13501-3 – Classification: Fire resistant ducts and fire
dampers 5
EN 1366-2 – Fire resistance tests for installations: Fire
dampers
EN 1751 Ventilation for buildings – Air terminal devices
Declaration of performance DoP / FK2-EU / DE / 002
1) Temperatures may differ for units with attachments. Details for other applications are available on request.
2) Data applies to uniform upstream and downstream conditions for the fire damper.
3) Condensation and the intake of humid fresh air have to be avoided as otherwise operation will be impaired or not possible.
4) For explosion-proof FK2-EU construction see the supplementary operating manual.
5) Leakage rate of the fire damper system tested at 300 Pa and 500 Pa negative pressure.
* Damper blade with lip seal for sizes 1 and 2, damper blade with travel stop seal for size 3, see table Ä 12 .
Technical data
General data
Fire damper Type FK2-EU 9

Product sticker
Fig. 1: Product sticker (example)
1 CE mark
2 Manufacturer's address
3 Number of the European standard and year of its
publication
4 Notified body
5 The last two digits of the year in which the CE
marking was affixed
6 Year of manufacture
7 No. of the declaration of performance
8 Website from which the DoP can be downloaded
9 Regulated characteristics; the fire resistance class
depends on the application and may vary
Ä Chapter 5.1 ‘Installation situations’
on page 29
10 Type
11 Order number
Technical data
General data
Fire damper Type FK2-EU10

2.2 FK2-EU with fusible link
Dimensions and weight
Fig. 2: FK2-EU with fusible link
B Width of the fire damper (side B)
H Height of the fire damper (side H)
FL Length of the fire damper (casing length)
Y Keep clear to provide access for operation
x 75 mm size 1
87 mm sizes 2 and 3
Installation side
Operating side
Weight of FK2-EU with fusible link, see table
Ä 12 .
Sizes 1 to 3, see table
Ä 12 .
Flange dimensions for L = 305 mm, see Fig. 3 .
Limit switch
Connecting cable length / cross section 1 m / 3 × 0.34 mm²
Protection level IP 66
Type of contact 1 changeover contact, gold-plated
Maximum switching current 0.5 A
Maximum switching voltage 30 V DC, 250 V AC
Contact resistance approx. 30 mΩ
Technical data
FK2-EU with fusible link
Fire damper Type FK2-EU 11

Weight [kg] for casing length L = 305 [mm] / L = 500 [mm]
1) Construction with spring return actuator: [A] = Horizontally arranged spring return actuator, [B] = Vertically
arranged spring return actuator
Sizes
Damper blade (30 mm thick) with lip seal for sizes 1 and 2, damper blade (40 mm thick) with travel stop seal for size
3.
Technical data
FK2-EU with fusible link
Fire damper Type FK2-EU12

Flange holes
Fig. 3: Flange holes L = 305 mm – uneven and even number of holes
** Other flange holes (non-standard)
Fig. 4: Flange holes L = 500 mm – uneven and even number of holes
B or H [mm] 200/100 – 355 360 – 630 635 –800 805 – 1250 1255 – 1500
No. of holes on each side
excluding corner holes
–1234
Technical data
FK2-EU with fusible link
Fire damper Type FK2-EU 13

2.3 FK2-EU with spring return actuator
Dimensions and weight
Fig. 5: FK2-EU with Belimo spring return actuator
B Width of the fire damper (side B)
H Height of the fire damper (side H)
FL Length of the fire damper (casing length)
[A] Spring return actuator horizontal
[B] Spring return actuator vertical
Y Keep clear to provide access for operation
Installation side
Operating side
Weight of FK2-EU with fusible link + approx. 1 kg (BFL... and BFN...), see table
Ä 12 .
For sizes 1 to 3 and orientation of the spring return actuator [A] or [B] see table
Ä 12 .
Flange dimensions for L = 305 mm, see Fig. 3 .
Technical data
FK2-EU with spring return actuator
Fire damper Type FK2-EU14

Spring return actuator BFL...
Construction 230-T TR 24-T-ST TR
Supply voltage 230 V AC, 50/60 Hz 24 V AC/DC, 50/60 Hz
Functional range 198 – 264 V AC 19.2 – 28.8 V AC
21.6 – 28.8 V DC
Power rating Spring winding mecha-
nism / hold position
3.5 W / 1.1 W 2.5 W / 0.8 W
Rating 6.5 VA 4 VA
Running time Actuator / spring return < 60 s / < 20 s
Limit switch Type of contact 2 changeover contacts
Switching voltage 5 – 120 V DC / 5 – 250 V AC
Switching current 1 mA – 3 (0.5 inductive) A
Contact resistance < 1 Ω (when new)
IEC protection class / IP protection II / IP 54
Storage temperature / ambient temperature -40 – 55 °C / -30 – 55 °C ¹
Ambient humidity ≤ 95% rh, no condensation
Connecting cable Actuator / limit switch 1 m, 2 × 0.75 mm² / 1 m, 6 × 0.75 mm² (free of halo-
gens)
Spring return actuator type BFL... for size 1.
¹ Up to 75 °C the safe position will definitely be reached.
Technical data
FK2-EU with spring return actuator
Fire damper Type FK2-EU 15

Spring return actuator BFN...
Construction 230-T TR 24-T-ST TR
Supply voltage 230 V AC, 50/60 Hz 24 V AC/DC, 50/60 Hz
Functional range 198 – 264 V AC 19.2 – 28.8 V AC
21.6 – 28.8 V DC
Power rating Spring winding mecha-
nism / hold position
5 W / 2.1 W 4 W / 1.4 W
Rating 10 VA (Imax 4 A @ 5 ms) 6 VA (Imax 8.3 A @ 5 ms)
Running time Actuator / spring return < 60 s / < 20 s
Limit switch Type of contact 2 changeover contacts
Switching voltage 5 – 120 V DC / 5 – 250 V AC
Switching current 1 mA – 3 (0.5 inductive) A
Contact resistance < 1 Ω (when new)
IEC protection class / IP protection II / IP 54
Storage temperature / ambient temperature -40 – 55 °C / -30 – 55 °C ¹
Ambient humidity ≤ 95% rh, no condensation
Connecting cable Actuator / limit switch 1 m, 2 × 0.75 mm² / 1 m, 6 × 0.75 mm² (free of halo-
gens)
Spring return actuator type BFN... for size 2 and 3.
¹ Up to 75 °C the safe position will definitely be reached.
Technical data
FK2-EU with spring return actuator
Fire damper Type FK2-EU16

Spring return actuator BF...
Construction 230-TN TR 24-TN-ST TR
Supply voltage 230 V AC, 50/60 Hz 24 V AC/DC, 50/60 Hz
Functional range 198 – 264 V AC 19.2 – 28.8 V AC
21.6 – 28.8 V DC
Power rating Spring-winding mecha-
nism / hold position
8.5 W / 3 W 7 W / 2 W
Rating 11 VA 10 VA
Run time Actuator / spring return < 120 s / approx. 16 s
Limit switch Type of contact 2 changeover contact
Switching voltage 5 – 120 V DC / 5 – 250 V AC
Switching current 1 mA ... 6 A
Contact resistance < 100 mΩ
IEC protection class / IP protection II / IP 54 III / IP 54
Storage temperature / ambient temperature -40 to 50 °C / -30 to 50 °C ¹
Ambient humidity ≤ 95% rh, no condensation
Connecting cable Actuator / limit switch 1 m, 2 × 0.75 mm² / 1 m, 6 × 0.75 mm² (free of halo-
gens)
BF actuator optional / upon request, weight of FK2-EU with fusible link + approx. 2 kg
¹ Up to 75 °C the safe position will definitely be reached.
Technical data
FK2-EU with spring return actuator
Fire damper Type FK2-EU 17

Dimensions and weight
Fig. 6: FK2-EU with Siemens spring return actuator
B Width of the fire damper (side B)
H Height of the fire damper (side H)
FL Length of the fire damper (casing length)
[A] Spring return actuator horizontal
[B] Spring return actuator vertical
Y Keep clear to provide access for operation
Installation side
Operating side
Weight of FK2-EU with fusible link + approx. 1.4 kg (GRA... and GNA...), see table
Ä 12 .
For sizes 1 to 3 and orientation of the spring return actuator [A] or [B] see table
Ä 12 .
Flange dimensions for L = 305 mm, see Fig. 3 .
Technical data
FK2-EU with spring return actuator
Fire damper Type FK2-EU18

Spring return actuator GRA...
Construction 326.1E 126.1E
Supply voltage 230 V AC, 50/60 Hz 24 V AC, 50/60 Hz /
24 – 48 V DC
Functional range 198 – 264 V AC 19.2 – 28.8 V AC
19.2 – 57.6 V DC
Power rating Spring winding mechanism 7 VA / 4.5 W 5 VA / 3.5 W
Hold position 3.5 W 2 W
Running time Actuator / spring return 90 s / 15 s
Limit switch Type of contact 2 changeover contacts
Switching voltage 24 – 230 V AC / 12 – 30 V DC
Switching current AC: 6 A (inductive 2 A) / DC: 2 A
IEC protection class / IP protection II / IP 42 or IP 54* III / IP 42 or IP 54*
Storage temperature / ambient temperature -20 to 50 °C / -20 to 50 °C
Ambient humidity < 95% rh, no condensation
Connecting cable Actuator / limit switch 0.9 m, 6 × 0.75 mm² (free of halogens)
Spring return actuator type GRA... for size 1.
*Connecting cable at the bottom
Spring return actuator GNA...
Construction 326.1E 126.1E
Supply voltage 230 V AC, 50/60 Hz 24 V AC, 50/60 Hz /
24 – 48 V DC
Functional range 198 – 264 V AC 19.2 – 28.8 V AC
19.2 – 57.6 V DC
Power rating Spring winding mechanism 7 VA / 4.5 W 5 VA / 3.5 W
Hold position 3.5 W 2 W
Running time Actuator / spring return 90 s / 15 s
Limit switch Type of contact 2 changeover contacts
Switching voltage 24 – 230 V AC / 12 – 30 V DC
Switching current AC: 6 A (inductive 2 A) / DC: 2 A
IEC protection class / IP protection II / IP 42 or IP 54* III / IP 42 or IP 54*
Storage temperature / ambient temperature -20 to 50 °C / -20 to 50 °C
Ambient humidity < 95% rh, no condensation
Connecting cable Actuator / limit switch 0.9 m, 6 × 0.75 mm² (free of halogens)
Spring return actuator type GNA... for sizes 2 and 3.
*Connecting cable at the bottom
Technical data
FK2-EU with spring return actuator
Fire damper Type FK2-EU 19

Spring return actuator GGA...
Construction 326.1E 126.1E
Supply voltage 230 V AC, 50/60 Hz 24 V AC, 50/60 Hz /
24 – 48 V DC
Functional range 198 – 264 V AC 19.2 – 28.8 V AC
19.2 – 57.6 V DC
Power rating Spring-winding mechanism 8 VA / 6 W 7 VA / 5 W
Hold position 4 W 3 W
Run time Actuator / spring return 90 s / 15 s
Limit switch Type of contact 2 changeover contact
Switching voltage 24 – 230 V AC / 12 – 30 V DC
Switching current AC: 6 A (inductive 2 A) / DC: 2 A
IEC protection class / IP protection II / IP 42 or IP 54* III / IP 42 or IP 54*
Storage temperature / ambient temperature -20 to 50 °C / -20 to 50 °C
Ambient humidity < 95% rh, no condensation
Connecting cable Actuator / limit switch 0.9 m, 6 × 0.75 mm² (free of halogens)
GGA actuator optional / upon request, weight of FK2-EU with fusible link + approx. 2.5 kg
*Connecting cable at the bottom
FK2-EU with Joventa spring return actuator
FK2-EU can also be supplied with a Joventa spring
return actuator (upon request):
SFR 2.90 T
SFR 1.90 T
SFR 1.90 T SLC
FK2-EU with explosion-proof Schischek spring
return actuator
FK2-EU can also be supplied with an explosion-proof
Schischek spring return actuator (upon request):
ExMax-15-BF-TR
RedMax-15-BF-TR
For more information see the Supplementary operating
manual for explosion-proof fire dampers type FK2-EU.
Technical data
FK2-EU with spring return actuator
Fire damper Type FK2-EU20