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Summary of Contents for Rf-t CR2
- Page 1 CIRCULAR FIRE DAMPER FOR LARGE DIAMETERS UP TO EI120S Produc t .guide Produc t .guide Rf-Technologies nv • Lange Ambachtstraat 40 • 9860 Oosterzele • Belgium TM - CR2 - EN - A - 04/2025 Tel +32 9 362 31 71 • info@rft.eu • www.rft.eu...
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Page 2: Table Of Contents
........................................2.2.2 CR2 with fusible link mechanism CFTH . - Page 3 INSTALLATION ..................................... . 3.1 (LOAD-BEARING) CONSTRUCTIONS .
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Page 4: General Info
GENERAL INFO We address this guide to all parties requiring detailed technical information on the fire damper, its installation and technically and regulatory relevant aspects. From designer and design office, to contractor and maintenance engineer. This document aims to provide a clear overview of the various aspects involved in selecting, installing and maintaining a fire damper. This guide is intended as a supplement to our existing product documentation. -
Page 5: Application
The CR2 is a circular fire damper for large dimensions up to Ø 630 mm with a fire resistance of up to 120 minutes. The damper tunnel is made of galvanised steel. The CR2 fire damper stands out for its fire resistance and universal installation options in the largest dimensions. -
Page 6: General Installation Guidelines
∎ Rf-t fire dampers can be connected to the ventilation system on one or both sides. For single-sided connections, the other side must be fitted with a non-combustible, sealing grille to prevent access to the damper blade and to ensure no risk of entrapment. -
Page 7: Inspection And Maintenance
1.5 INSPECTION AND MAINTENANCE A fire damper is maintenance-free. The fire damper and mechanisms must always remain accesible. After installation, the correct operation of the fire damper (opening and closing of the damper blade) must be checked immediately. Subsequently, the fire damper must be checked every six months to identify potential damage in a timely manner (see art. 8.3 of EN 15650 - product standard for fire dampers). -
Page 8: Storage And Logistics
1.6 STORAGE AND LOGISTICS As fire dampers are safety devices, they require careful handling and storage. Avoid shocks, damage, exposure to water and deformation of the product. Hidden defects will only be considered for warranty if they are reported to Rf-Technologies within 5 days of detection. It is recommended to unload in a dry area do not tilt the damper in order to move it... -
Page 9: Technical Data
2.1.1 CR2 The CR2 fire damper is a circular fire damper, available up to a diameter of 630 mm*.It has a fire resistance of up to 120 minutes. The CR2 fire damper has a tunnel made of galvanised steel with a damper blade made of moisture-resistant and asbestos-free material. -
Page 10: Cr2-L500
2.1.2 CR2-L500 CR2 fire damper with extended tunnel on the wall side to facilitate duct connection if walls thicker than 100 mm. For dampers up to Ø 500 mm, the damper blade does not protrude, allowing a grille or bend to be connected directly. -
Page 11: Product Label
153% 100 mm Extended fire dampers can facilitate installation, for example, in wider walls. To improve the ease of installation, the CR2, with a standard length of 375 mm, can be replaced by a longer 500 mm version (CR2-L500). 230 mm... -
Page 12: Mechanisms
2.2 MECHANISMS 2.2.1 Overview The CR2 fire damper can be equipped with different types of mechanisms. MECHANISM TYPE VERSION Standard CFTH + FCU Fusible link CFTH CFTH + FDCU CFTH + FDCB Unipolar limit switch with or without plug FDCU(-ST) -
Page 13: Cr2 With Fusible Link Mechanism Cfth
2.2.2 CR2 WITH FUSIBLE LINK MECHANISM CFTH The release mechanism CFTH automatically closes the fire damper blade when the temperature in the duct exceeds 72°C. The temperature rise causes the fusible link to react. This causes a strained, internal torsion spring to relax which brings the damper blade to its safety position (closed). -
Page 14: Cr2 With Spring Return Actuator One
The Rf-t spring return actuator ONE has been specially developed to easily monitor and automatically and remotely control Rf-t fire dampers of all sizes. The ONE is available in 24V and 230V versions. A thermal fusible link reacts when the temperature exceeds 72°C. -
Page 15: Cr2 With Spring Return Actuator One-X
The ONE-X is a spring return actuator with an integrated communication module. The ONE-X allows automatic and remote control of the full range of Rf-t fire dampers. When the spring return actuator is energised, it brings the damper blade into its waiting position. -
Page 16: Cr2 With Spring Return Actuator Belimo
The spring return actuator BFL-T(-ST) is specially designed to remotely monitor, open and operate fire dampers and is available in 24V and 230V versions. The BFL version is intended for CR2 fire dampers up to and including Ø 400 mm. A thermoelectric fuse (T) that reacts when the temperature exceeds 72°C is included, a plug (ST) to facilitate connection. - Page 17 The spring return actuator BFN(T)(-ST) is intended for CR2 fire dampers from Ø 450 mm and is available in 24V and 230V versions. A thermoelectric fuse (T) that reacts when the temperature exceeds 72°C. The motor is equipped with a beginning -and end-of-range switch as standard, but can also be fitted with a double set of beginning -and end-of-range switch (SN2).
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Page 18: Monitoring And Control Of Fire Dampers
2.3 MONITORING AND CONTROL OF FIRE DAMPERS Fire dampers with spring return actuators need to be monitored and controlled remotely. A bus network-based control and monitoring system can be used for this purpose. Such a system allows continuous and individual monitoring of all fire dampers (including non-motorised ones). -
Page 19: Weights
2.4 WEIGHTS 2.4.1 CR2 Weight of damper without mechanism (kg) Dn [mm] 11,2 14,2 16,2 19,2 22,2 26,2 Weight of the mechanism (incl. mounting plate) (kg) CFTH ONE(X) BFL(T) BFN(T) 2.4.2 CR2-L500 Weight of damper without mechanism (kg) Dn [mm]... -
Page 20: Options
2.6.3 EN 1751 - CLASS C CR2 fire dampers are class B as standard. CR2 fire dampers with dimensions > Ø 315 mm are available with air tightness class C according to EN 1751. This corresponds to classes C/D for ventilation ducts. Pay attention to an airtight connection between duct and fire damper. -
Page 21: Varia
2.7 VARIA 2.7.1 FLEXIBLE CONNECTION Flexible connections may be used. For example, based on local or regional regulations or guidelines (e.g. M-LüAR, DW145). The designer and/or installer of the ventilation ducts selects the way these flexible connections are realised and applied. Both elastic connections and flexible ventilation ducts are possible to avoid possible forces on the installed fire damper. -
Page 22: Installation
INSTALLATION The installation of fire dampers relies on several key principles. This third chapter deals with each of these aspects in a clear and concise manner: ∎ The (load-bearing) structures in which the fire dampers are installed (compartment boundaries). These are indicated by the letter ‘A’. -
Page 23: Load-Bearing) Constructions
3.1 (LOAD-BEARING) CONSTRUCTIONS 3.1.1 GENERAL Rf-t fire dampers are tested in standardised (load-bearing) structures according to EN 1366-2. The results obtained apply to similar (load-bearing) structures with a fire resistance, thickness and density equal to or greater than the tested (load-bearing) structure. -
Page 24: Flexible Wall Type A
(see "3.1.8 Installation at minimal distance""). Rf-t tests fire dampers without drywall or anchors in the day edges. The addition of such components does not negatively affect the classification of the fire dampers. - Page 25 Alternative: without horizontal bracing. When installing a fire damper in a flexible metal stud wall, some installation methods do not require reinforcing profiles around the wall opening from a fire technical point of view. Where applicable, this alternative is shown with the installation methods in section 3.3.
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Page 26: Flexible Wall Type F
(see "3.1.8 Installation at minimal distance""). Rf-t tests fire dampers without drywall or anchors in the day edges. The addition of such components does not negatively affect the classification of the fire dampers. -
Page 27: Gypsum Block Wall
Rigid floors are cellular concrete or concrete floors with a specific gravity of at least 650 ± 200 kg/m³ (EN 1363-1). Any voids around the fire damper should be filled. Rf-t fire dampers can be installed either with mechanism below or above the floor. 3.1.7 SANDWICH PANEL SYSTEM Paroc panels with thickness ≥... -
Page 28: Installation At Minimal Distance
≥ 200 mm The certified solution for Rf-t fire dampers consists of the following elements: on the one hand, to apply a universal sealing where the distance between fire damper and a second fire damper or to a structural component is smaller than the minimum... - Page 29 The operating mechanism must remain accessible at all times for inspection and/or servicing. 400 mm 150 mm When installing Rf-t fire dampers at minimal distance in a lightweight partition wall, no metal profiles should be placed between the fire damper and the (load-bearing) structure or between the fire dampers themselves. 400 mm 150 mm Information on each wall/sealing combination is further detailed in this manual.
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Page 30: Sealing And Installation Materials
(possibly in consultation with Rf-t). Always take into account the stability of the wall and the proper functioning of the fire damper. -
Page 31: Overview Of Sealing Systems
(possibly in consultation with Rf-t). Always take into account the stability of the wall and the proper functioning of the fire damper. -
Page 32: Installation Methods
3.3 INSTALLATION METHODS This section provides an overview of our certified installation methods. A correct installation, meeting the required fire resistance, can only be achieved if the fire damper, the (load-bearing) construction and the sealing system are well matched. In the overview table below, you can quickly find which installation methods are suitable for your specific application depending on the required fire resistance (classification) and the type and thickness of the (load-bearing) construction. -
Page 33: Rigid Wall - Mortar
3.3.1 RIGID WALL - MORTAR i ↔ o)S Ø 200-630 mm w ≥ 100, w* ≥ 100 EI120 (v Minimal distance 400 mm 400 mm 400 mm 150 mm 150 mm A.4 Rigid wall C.01 Mortar 20 ≤ s ≤ 50 ... -
Page 34: Rigid Wall - Gypsum
3.3.2 RIGID WALL - GYPSUM i ↔ o)S Ø 200-630 mm w ≥ 100, w* ≥ 100 EI120 (v Minimal distance 400 mm 400 mm 400 mm 150 mm 150 mm A.4 Rigid wall C.02 Gypsum 20 ≤ s ≤ 50 ... -
Page 35: Rigid Wall - Fire Batt
3.3.3 RIGID WALL - FIRE BATT i ↔ o)S Ø 200-630 mm w ≥ 100, w* ≥ 100 EI120 (v Ø 200-630 mm w ≥ 100, w* ≥ 100 EI90 (v i ↔ o)S Promat, Hilti i ↔ o)S Ø 200-630 mm w ≥... -
Page 36: Rigid Floor - Mortar
3.3.4 RIGID FLOOR - MORTAR i ↔ o)S Ø 200-630 mm w ≥ 150, w* ≥ 100 EI120 (h 150 mm 400 mm Minimal distance 150 mm 400 mm A.7 Rigid floor C.01 Mortar 20 ≤ s ≤ 40 ... - Page 37 i ↔ o)S Ø 200-630 mm w ≥ 125, w* ≥ 125 EI90 (h A.7 Rigid floor C.01 Mortar 20 ≤ s ≤ 60 version A 04/2025 37 / 50...
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Page 38: Rigid Floor - Fire Batt
3.3.5 RIGID FLOOR - FIRE BATT i ↔ o)S Ø 200-630 mm w ≥ 150, w* ≥ 100 EI120 (h C.31 150 mm ≤ Dn + 2s 400 mm Minimal distance 150 mm 400 mm A.7 Rigid floor C.31 Fire batt 2 x 50 mm 20 ≤... -
Page 39: Flexible Wall - Mortar
3.3.6 FLEXIBLE WALL - MORTAR i ↔ o)S Ø 200-630 mm A.2 Type F w ≥ 100, w* = w EI90 (v In case of round recess, alternative without horizontal studs: Minimal distance 400 mm 150 mm A.2 Flexible wall ... -
Page 40: Flexible Wall - Gypsum
3.3.7 FLEXIBLE WALL - GYPSUM i ↔ o)S Ø 200-630 mm A.2 Type F w ≥ 100, w* = w EI120 (v Ø 200-630 mm A.1 Type A w ≥ 100, w* = w EI60 (v i ↔ o)S Alternatief zonder horizontale versteviging: Minimal distance 400 mm... -
Page 41: Flexible Wall - Fire Batt
3.3.8 FLEXIBLE WALL - FIRE BATT i ↔ o)S Ø 200-630 mm A.2 Type F w ≥ 100, w* = w EI120 (v Ø 200-630 mm A.2 Type F w ≥ 100, w* = w EI90 (v i ↔ o)S Promat, Hilti i ↔... -
Page 42: Flexible Partition - Stone Wool & Cover Plates
3.3.9 FLEXIBLE PARTITION - STONE WOOL & COVER PLATES i ↔ o)S Ø 200-630 mm A.2 Type F w ≥ 100, w* =w EI90 (v Ø 200-630 mm A.1 Type A w ≥ 100, w* =w EI60 (v i ↔ o)S Minimal distance 400 mm 150 mm... -
Page 43: Gypsum Block Wall - Block Glue
3.3.10 GYPSUM BLOCK WALL - BLOCK GLUE i ↔ o)S Ø 200-630 mm w ≥ 70, w* ≥ 70 EI120 (v Minimal distance 400 mm 150 mm A.3 Gypsum block wall C.03 Block glue 20 ≤ s ≤ 40 ... -
Page 44: Sandwich Panel System - Fire Batt
3.3.11 SANDWICH PANEL SYSTEM - FIRE BATT i ↔ o)S Ø 200-630 mm w ≥ 100, w* = w EI120 (v C.31 ≥ 20 2.25 2.44 200% C.31 2.44 2.44 2.25 Verstek gesneden stalen pro elen A.9 Sandwich panel system Paroc AST ... -
Page 45: Suspension Of The Fire Damper
3.4 SUSPENSION OF THE FIRE DAMPER 3.4.1 SUSPENSION OF THE FIRE DAMPER IN A VERTICAL (LOAD-BEARING) CONSTRUCTION Rf-Technologies' fire dampers are usually tested in a vertical (load-bearing) construction (wall) without suspension. An exception to this are fire dampers located outside the wall, installation in Paroc Sandwich panel system or with sliding ceiling connection, technical details of suspension in these situations are documented in the relevant installation sheet. -
Page 46: Suspension Of The Fire Damper In A Horizontal (Load-Bearing) Construction, Sealed With Fire Batts
3.4.2 SUSPENSION OF THE FIRE DAMPER IN A HORIZONTAL (LOAD-BEARING) CONSTRUCTION, SEALED WITH FIRE BATTS. The ventilation ducts are supported according to the rules of good craftsmanship in accordance with the instructions provided by the manufacturers of the fastening materials. 3.5 VENTILATION DUCT CONNECTION The flange of the fire damper is equiped with a sealing ring over which the ventilation duct is slid. -
Page 47: Combined Penetrations
3.6 COMBINED PENETRATIONS Mixed penetrations are referred to when techniques evaluated according to different test standards pass through the same recess in the (load-bearing) construction and are sealed in the same way. Fire dampers are tested according to EN 1366-2 and are usually given an EIS classification. -
Page 48: Overview Legend
3.8 OVERVIEW LEGEND (LOAD-BEARING) CONSTRUCTIONS Flexible wall type A Flexible walls type A are constructed with metal studs as specified in European standard EN 13501-2. The walls are constructed according to the manufacturer's guidelines or standards in force locally. The wall thickness is 98 mm minimum, with 2 x 12.5 mm double-sided gypsum plasterboard, namely gypsum (cardboard) boards type A according to EN520 (GKB according to DIN 18180). - Page 49 (possibly in consultation with Rf-t). Always take into account the stability of the wall and the proper functioning of the fire damper.
- Page 50 Vertical profile 1.31 Plasterboard 12.5 mm type F 1.32 Plasterboard 12.5#mm type A Stone wool 40 kg/m³ Mounting screws Ø6mm (anchored to (load-bearing) construction) Mounting screws Ø3.5mm Universal screw ø 6 x 50 mm 2.25 Steel L-profile 30 x 30 x 2 (galvanised) 2.44 Hilti S-MD01Z 4.8 x 19 Jointfiller...
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