mercor mcr FID B User manual

Ul. Grzegorza z Sanoka 2
80-408 Gdańsk
tel. [phone]
tel./fax [phone]
OPERATION AND
MAINTENANCE MANUAL
(OMM)
Fire damper type
mcr FID B
Version FID B 21.07.30.2
FIRE VENTILATION SYSTEMS

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 2/22
TABLE OF CONTENTS:
1. INTRODUCTION ...................................................................................................................................................... 3
2. SUBJECT .................................................................................................................................................................. 3
3. DEVICE INTENDED USE ......................................................................................................................................... 3
4. DESIGN AND OPERATING PRINCIPLE ................................................................................................................. 4
5. DEVICE IDENTIFICATION ....................................................................................................................................... 8
6. INSTALLATION ........................................................................................................................................................ 8
6.1. PRE-ASSEMBLY INSPECTION ..................................................................................................................... 9
6.2. INSTALLATION OPENING ............................................................................................................................. 9
6.3. EMBEDDING ................................................................................................................................................... 9
6.4. ELECTRICAL CONNECTIONS .................................................................................................................... 15
7. TRANSPORT & STORAGE CONDITIONS ............................................................................................................ 21
8. MAINTENANCE AND SERVICING ........................................................................................................................ 21
9. WARRANTY TERMS & CONDITIONS .................................................................................................................. 21
Technical Manual designations
Option available
Option unavailable
CAUTION
All previous issues of this Technical Manual expire on the date of issue hereof.
The Technical Manual does not apply to the fire dampers manufactured before its date of
issue.

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 3/22
CAUTION
The product should be stored and used in rooms where:
• there is no access to dust, gases, caustic vapors and other aggressive chemical
vapors that can destroy the insulating elements and structural elements;
• the flaps are not affected by direct sunlight and UV radiation;
• the maximum relative humidity does not exceed 80% at the temperature of +20 ºC;
• the ambient temperature is between - 20 ºC and + 40 ºC;
• there are no vibrations.
In the case of cut-off and transfer fire dampers, the device is equipped with a thermal release containing
one-time temperature fuses. During normal operation, the above mentioned element should be protected
against the affect of the permissible temperature Tmax (see the table below). When it is exceeded, the
temperature fuses may operate, which is a normal operation and is not covered by the guarantee or
warranty.
A thermal release for a damper equipped with an electric actuator:
Thermal fuse for temperature 72 ºC 95 ºC
Temperature fuse inside the duct Tmax 40 ºC Tmax 60 ºC
Outdoor temperature fuse Tmax 40 ºC Tmax 40 ºC
A thermal release for a damper equipped with KW1 or RST mechanism:
Thermal fuse for temperature 72 ºC 95 ºC
Temperature fuse inside the duct Tmax 40 ºC Tmax 60 ºC

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 4/22
1. INTRODUCTION
The purpose of this operation and maintenance manual is to get the user acquainted with the intended
use, design, the principle of operation, correct installation and operation of the product.
The manual also includes additional information about the operating conditions, maintenance and warranty
conditions of the product.
2. SUBJECT
This manual concerns the entire group of single-plane fire dampers type mcr FID B. Compliance with the
Manual guidelines ensures correct functioning of the device in terms of fire protection of rooms as well
as safety of the system users.
3. DEVICE INTENDED USE
Application
Single-plane fire dampers type mcr FID B (square cross-section) may be used as:
cut-off fire dampers – mcr FID B/S
cut-off fire dampers for fire ventilation systems – mcr FID B/V
cut-off fire dampers for mixed fire ventilation systems – mcr FID B/M
transfer dampers – mcr FID B/T
relief dampers – mcr FID B/G
Caution:
Cut-off fire dampers for fire ventilation systems the mcr FID B/V and fire dampers for mixed fire ventilation
systems the mcr FID B/M, have one declaration of performance in accordance with the requirements of
law.
The marker -M and the word "mixed" used in the document are trademarks used by the manufacturer.
The construction and execution of the above dampers is the same regardless of the commercial mark.
The mcr FID B dampers have the MA feature (manual activate). This means that the damper
partition can change its position during a fire (the damper can open or close). The damper can be
operated without deteriorating its fire properties for 25 minutes.
Dampers classified as "MA" can be used wherever a multi-stage fire scenario is required, wherever manual
control of the smoke exhaust system by authorized units is allowed during a fire (e.g. the need to
"manually" change the position of the damper partitions and " overrides "of the smoke exhaust system
automatically started in the wrong fire zone).
The dampers cannot be operated in systems exposed to dust, except for when they are included in a
special, individually developed programme of service and technical inspections.
Fire resistance
The damper type mcr FID B has the following fire resistance:
EI60S /S /V /V-M /T /G EI120S /S /V /V-M /T /G
EI60 /S /V /V-M /T /G EI120 /S /V /V-M /T /G
E60S /S /V /V-M /T /G E120S /S /V /V-M /T /G
E60 /S /V /V-M /T /G E120 /S /V /V-M /T /G

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 5/22
Execution versions
mcr FID B dampers can be made as rectangular dampers.
Dimension type series
mcr FID B fire dampers are manufactured in the following size ranges:
Width: 200 to 1200 mm
Height: 200 to 800 mm
Width: 600 mm
Aside from the standard dimensions, the fire dampers may also be manufactured in intermediate sizes.
The damper casing can be made longer on request. Maximum surface area of type mcr FID B dampers:
0,96 m2. The minimum damper surface area is 0,04 m2.
4. DESIGN AND OPERATING PRINCIPLE
Design
The mcr FID B dampers consist of a casing with a rectangular cross-section consisting of fireproof boards,
a movable cut-off partition and an actuator operated manually or remotely. The cut off partition of the
dampers is made of a fireproof boards and is set in a sheet-metal profile. There is a ventilation gasket on
the inside of the housing. Retaining sections made of fireproof boards are attached to the inner surface of
the housing, limiting the movement of the rotating partition. The sections are covered with a ventilation
gasket. Corners made of steel, galvanized or stainless steel are attached to the outer surface of the
housing in the corners. For chemically aggressive environments, special enclosures are used, where the
fireproof boards are impregnated.
Function
The operating principle and behaviour of the mcr FID B single-plane dampers depend on their application
versions:
cut-off fire dampers – mcr FID B/S
In the normal operating position the dampers are open. The dampers are closed (to the safety position)
as follows:
automatically, by tripping the thermoelectric trigger
remotely, by tripping an electric axial actuator with a return spring caused by isolation from the supply
voltage
automatically, by tripping the thermal trigger and the driving spring
cut-off fire dampers for fire ventilation systems – mcr FID B/V
In the normal operating position the dampers are open or close depending on the function. The dampers
are closed/ opened as follows:
remotely, by tripping an electric axial actuator without a return spring, as a result of applying the
supply voltage to the actuator in the right manner. The damper blade can change position without loss
of device functionality for 25 minutes from the time of activation of operation.
remotely, by tripping the electromagnetic release and a spring as a result of applying the voltage
cut-off fire dampers for mixed fire ventilation systems – mcr FID B/M
In the normal operating position the dampers are open or close depending on the function. The dampers
are closed/ opened as follows:
remotely, by tripping an electric axial actuator without a return spring, as a result of applying the
supply voltage to the actuator in the right manner. The damper blade can change position without loss
of device functionality for 25 minutes from the time of activation of operation.
remotely, by tripping the electromagnetic release and a spring as a result of applying the voltage

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 6/22
transfer fire dampers – mcr FID B/T
In the normal operating position the dampers are open or closed. The dampers are switched to the
safety position as follows:
automatically, by tripping the thermoelectric trigger
manually, by pressing the control button on the thermoelectric trigger
remotely, by tripping an electric axial actuator with a return spring caused by isolation from the supply
voltage
automatically, by tripping the thermal trigger and the driving spring
relief fire dampers – mcr FID B/G
In the normal operating position the dampers are open or closed. The dampers are switched to the
safety position as follows:
automatically, by tripping the thermoelectric trigger
manually, by pressing the control button on the thermoelectric trigger
It is possible to manually service check the proper performance of the dampers with electrical actuators
by placing a special hex wrench in the socket marked on the actuator and rotating it to set the damper
isolating partition in the relevant position. Rotate the wrench slowly, smoothly and carefully. Rotating the
wrench too fast or too rapidly may damage the internal actuator gear or the drive transmission system.
It is possible to manually service check the proper performance of the integrated damper with the trigger
control gear by pressing the lever on the gear. The mcr T2 tester is recommended to check the proper
performance of dampers with electric actuators.
CAUTION
Never pull directly on the damper isolation partition to open or close the device. This may result in
damage of the self-locking driving gear of the damper that is not covered by warranty. It is
recommended that the fire damper were opened and closed when the ventilation system is turned
off.
Trigger control gears
The following trigger control gears are available for the mcr FID B fire dampers:
Electric actuator:
BF 230-T /S /V /V-M /T /G BE 230 /S /V /V-M /T /G
BF 24-T (-ST) /S /V /V-M /T /G BE 24 (-ST) /S /V /V-M /T /G
BF 24-T-TL /S /V /V-M /T /G BLE 230 /S /V /V-M /T /G
BFL 230-T /S /V /V-M /T /G BLE 24 (-ST) /S /V /V-M /T /G
BFL 24-T (-ST) /S /V /V-M /T /G EXBF 230 /S /V /V-M /T /G
BFN 230-T /S /V /V-M /T /G EXBF 24 /S /V /V-M /T /G
BFN 24-T (-ST) /S /V /V-M /T /G BF 230-TN /S /V /V-M /T /G
BF 24-TN (-ST) /S /V /V-M /T /G BF 24-TN-TL /S /V /V-M /T /G
BEE 230 /S /V /V-M /T /G BEE 24 (-ST) /S /V /V-M /T /G
BEN 230 /S /V /V-M /T /G BEN 24 (-ST) /S /V /V-M /T /G
MF 230-T /S /V /V-M /T /G MF 24-T /S /V /V-M /T /G
MLF 230-T /S /V /V-M /T /G MLF 24-T /S /V /V-M /T /G
Spring gear:
RST /S /V /V-M /T /G RST/KW1/S /S /V /V-M /T /G
RST/KW1/24P /S /V /V-M /T /G RST/KW1/24I /S /V /V-M /T /G
RST/KW1/230P
/S /V /V-M /T /G RST/KW1/230I /S /V /V-M /T /G

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 7/22
Basic dimensions
D210
H40
B40
49055
600
E A
C
Actuator A C D E
BE 198 10 75 81
BLE 130 30 75 70
BEE 149 30 75 52
BEN 130 30 75 48
5. DEVICE IDENTIFICATION
mcr FID B
B x H
/1
/2
/3
6. DEVICE ASSEMBLY
CAUTION
During the assembly of the damper and installation finish, future access to the device and removal
of the trigger control gear must be considered to enable servicing and inspection.
The mcr FID B dampers can be installed at a distance from the following building partitions:
walls with a wooden structure of the thickness required for fire resistance
walls made of boards with the thickness required for fire resistance
masonry walls of the thickness required for fire resistance
masonry walls made of bricks or blocks of the thickness required for fire resistance
rigid floor with the thickness required for fire resistance
Additionally, the dampers can be installed:
outside the partitions (walls, ceilings)
in modules (multiple dampers sets)
6.1. PRE-ASSEMBLY INSPECTION
Each fire damper is factory inspected by the manufacturer prior to packing and shipping. Upon unpacking
the delivered fire damper, visually examine it for any damage in transport or casing deformation.
6.2. INSTALLATION OPENING
The minimum size of the opening enabling the correct installation of a rectangular damper is, depending
on the thickness of fire resistant duct system:
fire protection duct wall thickness 40mm: X min. 160mm
fire protection duct wall thickness 50mm X min. 200mm
fire protection duct wall thickness 60mm X min. 180mm
Optional fittings
Material
Trigger control gear
Width x height (nominal)
Damper type / execution

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 8/22
H + X
B + X
H + X
B + X
H + X
H + X
Preparation of the installation opening
6.3. EMBEDDING / FIXING THE DAMPER
2 2
1
1. Damper mcr FID B BxH
2. Wooden blocks
Protecting the damper against buckling
The mcr FID B fire damper will work properly if the isolation partition rotation axis is horizontal. If the case of fire
damper must have vertical verical axial, state this when ordering. The trigger control gear may be located on the right
or on the left hand side of the damper at any direction of air flow.
The dampers can be installed on the vertical or horizontal section of the fire ventilation duct across the duct or on the
surface of the sides of the duct. The damper can also be installed in a construction shaft used for fire ventilation.
Acceptable assembly is shown in the figures further in the document.
Before embedding/fixing, place the damper in the fire ventilation duct or consruction shaft used for fire ventilation,
please the damper axially in the previous prepared opening. Level the device and secure in place. Next, actuate the
damper isolation partition by hand to verify that the rotation is correct (i.e. there is no collision with the damper casing
parts, etc.). Close the damper isolation partition. Install the bracing as shown in the figure. Carefully fill the gap
between the damper casing and the duct with a proper mortar formula that ensures proper duct and damper fire
resistance, and do not let the mortar get into the damper actuation components (i.e. the trigger control gear, the
isolation partition, gaskets and stops). To do this, the fire damper must be covered with plastic film or other suitable
material and remain so until the embedding and finishing is done. The damper must remain closed until the mortar
has cured. Once the mortar has cured, remove the temporary supports and open and close the fire damper to verify
its performance.
The embedded fire damper must be coaxially connected to the ventilation duct. Protect the fire damper casing from
damage, and specifically from straining the casing during the installation process. The fire damper cannot bear the
load of the ventilation duct or the ventilation system in which it is installed. Drilling the damper enclosure or driving
screws, bolts or other elements that pierce through the casing to the inside of the damper is prohibited. A mounting
frame RB is used to connect a steel ventilation duct. Once connected to the ventilation ducts, re-verify the fire damper
performance. With the installation finished, carefully clean the fire damper and make sure that there is no debris
which could influence proper performance of the device.
CAUTION

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 9/22
It is crucial to keep the device embedding envelope so that the trigger control gear is outside of
the wall envelope and easily accessible.
7
8
2
1 2
3
5
46
2
15
4
6
1. mcr FID B BxH damper
2. Multi-zone smoke
extract duct - eg made
of fire-rated boards
3. A strip of fire-resistant
board along the entire
length of the side BxH
4. System of ceiling
hanger
5. System of installation
transition of the
fireproof duct
6. Panel wall
7. M10x20 screw
8. MWB system grille
Installation of damper in panel walls
7
8
1 23
2
1
4
5
6
2
4
5
6
1. mcr FID B BxH damper
2. Multi-zone smoke
extract duct - eg made
of fire-rated boards
3. A strip of fire-resistant
board along the entire
length of the side BxH
4. System of ceiling
hanger
5. System of installation
transition of the
fireproof duct
6. Panel wall
7. M10x20 screw
8. MWB system grille
Installation of damper in solid walls
6
7
5
2
1
2
3
4
5
2
1
4
1. mcr FID B BxH
damper
2. Multi-zone smoke
extract duct - eg made
of fire-rated boards
3. A strip of fire-resistant
board along the entire
length of the side BxH
4. System of installation
transition of the
fireproof duct
5. Rigid floor
6. M10x20 screw
7. MWB system grille
Installation of damper in rigid floor – above the rigid floor

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 10/22
6
7
5
2
1
2
3
4
5
2
1
4
1. mcr FID B BxH
damper
2. Multi-zone smoke
extract duct - eg made
of fire-rated boards
3. A strip of fire-resistant
board along the entire
length of the side BxH
4. System of installation
transition of the
fireproof duct
5. Rigid floor
6. M10x20 screw
7. MWB system grille
Installation of damper in rigid floor – below the rigid floor
5
6
212 34
2
1 2
3
42
1. mcr FID B BxH damper
2. Multi-zone smoke
extract duct - eg made
of fire-rated boards
3. A strip of fire-resistant
board along the entire
length of the side BxH
4. System of ceiling
hanger
5. M10x20 screw
6. MWB system grille
Installation of the damper on horizontal ducts
2
4
1
3
2
56
24
1
3
1. mcr FID B BxH
damper
2. Multi-zone smoke
extract duct - eg made
of fire-rated boards
3. A strip of fire-resistant
board along the entire
length of the side BxH
4. System of ceiling
hanger
5. M10x20 screw
6. MWB system grille
Installation of the damper on vertical ducts

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 11/22
4
1
3
2
56
24
1
3
2
1. mcr FID B BxH damper
2. Multi-zone smoke
extract duct - eg made
of fire-rated boards
3. A strip of fire-resistant
board along the entire
length of the side BxH
4. System of ceiling
hanger
5. M10x20 screw
6. MWB system grille
Installation of the damper on vertical ducts
A
212 34
1. mcr FID B BxH damper
2. Multi-zone smoke
extract duct - eg made
of fire-rated boards
3. A strip of fire-resistant
board along the entire
length of the side BxH
4. System of ceiling
hanger
Variants of detail A:
10
5010
10
100100
6060
20
120
56
40
5. A strip of fire-resistant
board along the entire
length of the side BxH
with dimensions
10x50mm
6. A strip of fire-resistant
board along the entire
length of the side BxH
with dimensions
20x50mm
Connection of a multi-zone fireproof duct, e.g. made of fire-reated boards
212 455 3
1. mcr FID B BxH damper
2. Single-compartment
smoke extract duct -
eg metal one
3. System of ceiling
hanger
4. M10x20 screw
5. RB mounting frame
Connection of a single- compartment fireproof duct, e.g. made of metal sheets

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 12/22
CAUTION
Smoke extraction duct should be made in accordance with the duct manufacturer's guidelines. The ducts
must have adequate fire resistance in accordance with the fire resistance provided for the entire solution.
Seal all connections between the damper and the ducts with appropriate mortar / glue / gaskets, ensuring
fire resistance. The cut off damper in vertical position fire ventilation systems may be mounted across the
horizontal smoke extract duct or on the sides of the horizontal smoke extract duct or on the surface of any
side of the vertical smoke extract duct.
Inspection access
The mcr FID B damper is factory-equipped with an access inspection, thanks to which the connected duct
and the damper can be inspected without the need to disassemble the installation. The inspection can be
opened by unscrewing the 4 extreme screws as shown in the drawing above.
40
B+74
B+14
H+74
H+14
4xM10
RB connecting subframe
The mcr FID B damper can be delivered by the manufacturer with a system assembly frame for
single-compartment fire ventilation ducts. Flanges allow the connection of ventilation ducts with the use of
clamps for fixing ducts. M10 rivet nuts located in the corners of the frame allow for centering the ducts. If
the RB assembly frame is assembled on its own, the connection should be sealed with fire rated material
that provides the appropriate fire resistance for the application.

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 13/22
B
B+78
H
H+78
5
o
12
MWB system grille
The mcr FID B damper can be delivered by the manufacturer with a system cover grille. In case of specific
architectural requirements, the structure of the system masking grilles allows covering the damper and the
grille with additional masking grilles.
o
10 Drilling area
Introduction of electric cables for electric power supply of the actuator
The introduction of electric cables to power the actuator should be done by drilling the actuator casing
with a Ø10 drill. The openings can be made in any plane of the casing marked in the drawing above.
After inserting the cables, fill the gap between the cable and the actuator housing with fire rated material
ensuring appropriate fire resistance, provided for the application, or use appropriate electric glands. The
power and control cables must have adequate fire resistance that guarantees the supply of the control
signal to the device in the event of a fire.
6.4. ELECTRICAL CONNECTIONS
With the fire damper properly installed and embedded connect the electrical system wiring to the fire
damper, if the device features controls or other parts that require electric power supply. The following
shows the connection diagrams and basic electrical data for the trigger control gears supplied with the
mcr FID B fire dampers.

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 14/22
Electric actuators – electrical specification
Actuator type
Location of the damper isolation partition
- Belimo BFL series
- Belimo BFN series
- Belimo BF series
- Mercor MLF series
- Mercor MF series
Open isolation partition – actuator indication: 90
Closed isolation partition – actuator indication: 0
- Belimo serii BE
- Belimo serii BLE
- Belimo serii BEE
- Belimo serii BEN
Open isolation partition – actuator indication: 0
Closed isolation partition – actuator indication: 90
Technical specifications BF 24, BF24-T, BF24-TN, MF 24T BF230, BF230-T, BF230-TN, MF 230T
Power supply AC 24V 50/60Hz DC 24V AC 220-240V 50/60 Hz
Power demand:
- for spring tensioning
- for spring holding
7 W
2 W
8,5 W
3 W
Sizing (apparent power) 10 VA 11 VA
Appliance class III II
Ingress protection rating IP 54 IP 54
Auxiliary circuit breaker: 2xSPDT
6 (3) A, 250V
2xSPDT
3 A, 250V~
- activation position [degrees] 5°, 80° 5°, 80°
Torque:
- motor 18 Nm 18 Nm
- spring 12 Nm 12 Nm
Cable connection:
- motor (L = 0.9 m) 2x0,75 mm
2
2x0,75 mm
2
- auxiliary circuit breaker 6x0,75 mm
2
6x0,75 mm
2
Movement time: (0-90°)
- motor 120 s 120 s
- return spring 16 s 16 s
Operating temperature range - 30 ...+50°C - 30 ...+50°C
Sound pressure level:
- motor max 45 dB (A) max 45 dB (A)
- spring ~ 63 dB (A) ~ 63 dB (A)
Technical specifications BE24, BE24-ST BE230 BLE24, BLE24-ST BLE230
Power supply AC 24V 50/60Hz
DC 24 V AC 220-240V 50/60 Hz AC 24V 50/60Hz DC 24V AC 220-240V 50/60 Hz
Power demand:
- for spring tensioning 12 W 8 W 7.5 W 5 W
- for spring holding 0,5W 0,5 W 0,5 W 1 W
Sizing (apparent power) 18 VA 15 VA 9 VA 12 VA
Appliance class III II III II
Ingress protection rating IP 54 IP 54 IP 54 IP 54
Auxiliary circuit breaker: 2xSPDT
6(3) A, 250V
2xSPDT
6(3) A, 250V
2xSPDT
3A, AC 250V
2xSPDT
3A, AC 250V
- activation position [degrees] 3°, 87° 3°, 87° 3°, 87° 3°, 87°
Torque:
- motor 40 Nm 40 Nm 15 Nm 15 Nm
- locking 50 Nm 50 Nm 20 Nm 20 Nm
Cable connection:
- motor (L = 0.9 m) 3x0,75 mm2 3x0,75 mm2 3x0,75 mm2 3x0,75 mm2
- auxiliary circuit breaker 6x0,75 mm2 6x0,75 mm2 6x0,75 mm2 6x0,75 mm2
Movement time: (0-90°) 60s 60 s 30 s 30 s
- motor
Operating temperature range - 30 ...+50°C - 30 ...+50°C - 30 ...+50°C - 30 ...+50°C
Sound pressure level:
- motor max 62 dB (A) max 62 dB (A) max 62 dB (A) max 62 dB (A)
Technical specifications BEE24, BEE24-ST BEE230 BEN24, BEN24-ST BEN230
Power supply AC 24V 50/60Hz
DC 24 V AC 220-240V 50/60 Hz AC 24V 50/60Hz DC 24V AC 220-240V 50/60 Hz
Power demand:
- for spring tensioning 2,5 W 3,5 W 3 W 4 W
- for spring holding 0,1W 0,4 W 0,1 W 0,4 W

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 15/22
Sizing (apparent power) 5 VA 6 VA 6 VA 7 VA
Appliance class III II III II
Ingress protection rating IP 54 IP 54 IP 54 IP 54
Auxiliary circuit breaker: 2xSPDT
3A AC 250V
2xSPDT
3A AC 250V
2xSPDT
3A, AC 250V
2xSPDT
3A, AC 250V
- activation position [degrees] 5°, 80° 5°, 80° 5°, 80° 5°, 80°
Torque:
- motor 25 Nm 25 Nm 15 Nm 15 Nm
Cable connection:
- motor (L = 0.9 m) 3x0,75 mm2 3x0,75 mm2 3x0,75 mm2 3x0,75 mm2
- auxiliary circuit breaker 6x0,75 mm2 6x0,75 mm2 6x0,75 mm2 6x0,75 mm2
Movement time: (0-90°) 60s 60 s 30 s 30 s
- motor
Operating temperature range - 30 ...+55°C - 30 ...+55°C - 30 ...+55°C - 30 ...+55°C
Sound pressure level:
- motor max 58 dB (A) max 58 dB (A) max 58 dB (A) max 58 dB (A)
Technical data
BFL24, BFL24-T BFL230, BFL230-T BFN24, BFN24-T BFN230, BFN230-T
Power supply AC 24 V 50/60 Hz
DC 24 V
AC 220–240 V 50/60 Hz
AC 24 V 50/60 Hz
DC 24 V
AC 220-240V 50/60 Hz
Power demand:
– when putting the spring
under tension
– when in standby
2.5 W
0.7 W
3,5 W
1.1 W
4 W
1.4 W
5 W
2.1 W
Apparent power
4 VA
6.5 VA
6 VA
10 VA
Protection class
III
II
III
II
IP rating
IP 54
IP 54
IP 54
IP 54
auxiliary switch:
– activation point [degrees]
2 x PDT
3(0.5) A AC 250V
2 x PDT
3(0.5) A AC
250V
2 x SPDT
3(0.5) A, 250 V
2 x SPDT
3(0.5) A, 250 V
5

, 80

5

, 80

5

, 80

5

, 80

Torque:
- motor
- spring
4 Nm
3 Nm
4 Nm
3 Nm
9 Nm
7 Nm
9 Nm
7 Nm
Wire connection:
– motor (length: 0.9 m)
– auxiliary switch
2 x 0.75 mm2
6 x 0.75 mm2
2 x 0.75 mm2
6 x 0.75 mm2
2 x 0.75 mm2
6 x 0.75 mm2
2 x 0.75 mm2
6 x 0.75 mm2
Movement time (0–90°):
- motor
- return spring
60 s
≈ 20 s
60
≈ 20 s
60 s
≈ 20 s
60 s
≈ 20 s
Working temperature range −30 ...+55°C −30 ...+55°C
−30 ...+55°C −30 ...+55°C
Sound pressure level:
- motor
- spring
max 43 dB (A)
~ 62 dB (A)
max 43 dB
(A)
~ 62 dB (A)
max 55 dB (A)
~ 67 dB (A)
max 55 dB (A)
~ 67 dB (A)
Technical specifications MLF 24T MLF 230T
Power supply AC 24V 50/60Hz DC 24 V AC 220-240V 50/60 Hz
Power demand:
- for spring tensioning 5 W 5 W
- for spring holding 2.5 W 3 W
Sizing (apparent power) 7 VA 7 VA
Appliance class III II
Ingress protection rating IP 54 IP 54
Auxiliary circuit breaker: 2xSPDT
6 (1.5)A AC 250V
2xSPDT
6 (1.5)A AC 250V
- activation position [degrees] 5

, 80

5

, 80

Torque:
- motor 4 Nm 4 Nm
- spring 4 Nm 4 Nm
Cable connection:
- motor (L = 0.9 m) 2x0.75 mm
2
2x0.75 mm
2
- auxiliary circuit breaker 6x0.75 mm
2
6x0.75 mm
2
Movement time: (0-90°)
- motor 40-75 s 40-75 s
- return spring

20s

20s
Operating temperature range - 30 ...+50°C - 30 ...+50°C
Sound pressure level:
- motor max. 45 dB (A) max. 45 dB (A)
- spring ~ 62 dB (A) ~ 62 dB (A)

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 16/22
Connection diagram for the BF24-Tand BF230-T actuators
Connection diagram for the BFL24-T, BFL230-T, BFN24-T, BFN230-T, BF24-TN and BF230-TN
actuators
Connection diagram for the MLF 24T, MLF 230T, MF 24T, MF 230T

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 17/22
Connection diagram for the BE24, BLE24, BE230 and BLE230 actuators
Connection diagram for the BEE24, BEN24, BEE230 and BEN230 actuators
Note:
The BE, BLE, BEE and BEE actuator operating control requires a three-wire system. The actuator sense
of rotation is switched by applying the supply voltage to terminal 2 or 3, depending on the desired sense.
The location of the limit switches for all types of actuators is shown for the position without voltage.
For proper operation of a device equipped with electrical actuators, it is recommended that the rated
voltage housed tolerance of 24V±10% or 230V±10%. Power supply devices other than listed above may
cause malfunction and will not be covered by the warranty conditions.
EXBF actuators
Technical specifications
EXBF 24
EXBF 230
Zone 1, 2, 21, 22
ATEX classification II 2 GD EEx d IIC T6
Power supply 24 V AC ±20% 50/60 Hz / 24 VDC-10/+20% 230 V AC ±14% 50/60 Hz
Power demand:
- for spring tensioning 7 W 8 W
- for spring holding 2 W 3 W
Sizing (apparent power) 10 VA 12.5 VA
Ingress protection rating IP 66 IP 66
Auxiliary circuit breaker: 2 x SPDT 6A (3) max 250 V AC 2 x SPDT 6A (3) max 250 V AC
- activation position 5

, 80

5

, 80

Torque:
- motor 18 Nm 18 Nm
- spring 12 Nm 12 Nm
Movement time: (90°)
- motor 150 s 150 s
- return spring

20s


20s

Ambient temperature - 20 ...+50°C - 20 ...+50°C

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 18/22
Connection diagram for the EXBF actuators
Caution:
For proper operation of a device equipped with electrical actuators, it is recommended that the rated
voltage housed tolerance of 24V±10% or 230V±10%. Power supply devices other than listed above may
cause malfunction and will not be covered by the warranty conditions.
RST/KW1 trigger control gear
The RST/KW1/S version has the limit switches installed in the gear itself. The electrical connections shall
be made by connecting the properly labelled conductors to the electrical system. A fusible trigger is
installed in the gear. The dampers with the RST/KW1/230I, RST/KW1/230P mechanisms, are supplied
with the RST/KW1/24... triggering and control mechanism, together with the 230/24V transformer module
type MP230/24. For the trigger and control mechanism of the "impulse" type damper, adequate power
must be provided to ensure that the control signal is supplied to the device in the event of fire.
RST/KW1/S RST/KW1/24I RST/KW1/24P RST/KW1/24I
+MP230/24
RST/KW1/24I
+MP230/24
Supply voltage X 24 V – 48 V DC 24 V – 48 V DC 230V AC 230V AC
Power consumption X 3.5 W 1.6 W 4.5 W 2.5 W
Holding force X 12 daN 12 daN 12 daN 12 daN
Thermal trigger trip point 72°C +-2°C
WK1d / WK2d limit switch NO/NC (switching contact)
5A, 230V AC
Switch trigger 3°, 87° – tolerance: +/- 2°
Limit switch operating
temperature -25 ...+85°C
Electrical connection X - release: cable 0.6 m, 2x0.5 mm2
- limit switch: cable 0.6 m, 6x0.5 mm2
Rotation angle 92°
Movement time Max. 2s - spring
Sense of rotation CCW
Gear weight 1.2 kg 1.4 kg 1.4 kg 1.5 kg 1.5 kg
KW1 gear power supply: WK1 limit switch WK2 limit switch
Wire number: 1-2 Wire number: 3-4 – NO (normally open)
Wire color: green / gray
Wire number: 6-7 – NO (normally open)
Wire color: brown / pink
Wire number: 4-5 – NC (normally closed)
Wire color: gray / blue
Wire number: 7-8 – NC (normally closed)
Wire color: pink / yellow
EX zone
EEx-e rated installation box
Thermal
trigger

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 19/22
Connection diagram for transformer module type MP230/24
Caution! - The location of the limit switches is shown for the fire damper in the safety position
For proper operation of a device equipped with electrical actuators, it is recommended that the rated
voltage housed tolerance of 24V±2% or 230V±2%. Power supply devices other than listed above may
cause malfunction and will not be covered by the warranty conditions.
RST trigger control gear
In the RST version the limit switches are independent units installed inside the fire damper casing. The
fusible release is located on the damper isolation partition. The driving spring is installed on the damper
isolation partition.
Installation of the RST fusible release:
 Move partition to the open position
 Install the fusible link on the hooks attached to the fire damper casing and the isolation partition
 Tighten the nut to lock the hook on the fire damper casing
Independent limit switches – RST version
WK1 – single switch – indicates that the fire damper is closed.
WK2 – tandem of switches – indicates that the fire damper is closed or open.
Switch technical specifications
WK1 and WK2 limit switch 1xNO/1xNC SPDT (switching contact) 5A, 230V
AC
Limit switch operating temperature -25 ...+85°C
Body Plastic
Moving hook with nut
Fusible link
Fixed hook on the
isolation partition
Damper isolation partition
Caution
The drawing is indicative only
and applies both to the
rectangular and circular form
versions.

mcr FID B single-plane fire dampers
“MERCOR” SA – The company reserves the right to modify and change the document. Version FID B 21.07.30.02 20/22
Caution
When the isolation partition closes, the closed
indication limit switch is switched over (contacts 2-3
are closed).
Electric connection diagram of WK1 and WK2 limit switches
7. TRANSPORT & STORAGE CONDITIONS
Fire dampers are packaged in cardboard boxes or placed on pallets. Dampers are protected against
damage by film or another covering material. Damper transport may take place using any means of
transport, provided they are protected against weather factors. Dampers placed on means of transport
should be secured against shifting of position during transport. Before installing dampers, control each of
them visually. Do not move the damper by holding by the connection cable or put a device on a release
and control mechanism. Do not hit or drop the damper. When moving and installing, support the damper
on the sides or edges of the body.
Dampers should be stored in closed rooms that provide protection against external weather conditions. In
the case dampers are stored on the ground, place them on protection pads in order to protect them against
damage. Storage should take place in rooms where:
• there is no access to dust, gases, caustic vapors and other aggressive chemical vapors that can
destroy insulating elements and structural elements;
• the dampers are not affected by direct sunlight and UV radiation;
• maximum relative humidity does not exceed 80% at the temperature of + 20 ºC;
• the ambient temperature is between - 20 ºC and + 40 ºC;
• there are no vibrations.
8. MAINTENANCE AND SERVICING
The equipment from Mercor SA requires periodic technical inspection and maintenance at least every 12
months throughout its operating life, i.e. during the warranty and post-warranty period. Inspection and
maintenance may only be carried out by the manufacturer or contractors authorised by MERCOR SA to
service its products.
Regular service inspections of fire protection equipment is mandatory in Poland according to § 3 Section
3 of the Polish Regulation of the Ministry of the Interior and Administration of 7 June 2010 on the fire
protection of buildings, other structures and areas (Polish Journal of Laws, Year 2010, No. 109 Item 719).
Do these recommended actions in the inspection intervals:
 Check the electrical connections, especially for all mechanical damage.
 Inspections of the condition of the supply voltage for the devices, which allowed the following
tolerances:
 24V±10% for electric actuators
 24V±2% for electromagnetic release mechanism
 230V ±10% for electric actuators
 230V±2% for electromagnetic release mechanism
 Check the equipment casing, especially for all mechanical damage.
 Check for any obstructions to proper performance of the equipment.
To facilitate the activities under service inspection, servicing and warranty claim response, e.g. visual
inspection or repairs, the equipment user/operator shall provide physical access to the equipment by
removing thermal insulation, suspended ceiling, and other installations, as required and applicable to
warrant unobstructed access.
Inspection ports, e.g. type mcr KRW are recommended for equipment installed in ducts.
In the case of roof mounted equipment, provide access to the area (via ladders or elevated platforms).
Closed indication
Open indication