mercor EXi-F User manual

Ul. Grzegorza z Sanoka 2
80 – 408 Gdańsk
phone [phone]
tel./fax (0
-
58) 341 39 85
OPERATION AND MAINTENANCE MANUAL
mcr EXi-F pressure differential system kit for smoke and
heat control systems
No EXi-F 005
2022
FIRE VENTILATION SYSTEM DEPARTMENT

EXi-F positive pressure smoke control system
„MERCOR” S.A. – Specifications are subject to change without notice. Version DTR_EXIF_EN_20220516 Page 2 / 28
INDEX:
1. INTRODUCTION .................................................................................................................................................................. 3
2. PRODUCT OVERVIEW ...................................................................................................................................................... 3
3. SYSTEM APPLICATIONS ................................................................................................................................................. 4
3.1. APPLICATIONS ................................................................................................................................................................... 4
3.2. OPERATION........................................................................................................................................................................ 5
3.3. SYSTEM SELECTION GUIDE ................................................................................................................................................ 8
4. SYSTEM COMPONENTS................................................................................................................................................... 8
4.1. MCR OMEGA CONTROL UNIT .............................................................................................................................................. 8
4.2. MCR EXI-F AIR SUPPLY UNITS ......................................................................................................................................... 13
4.2. DIFFERENTIAL PRESSURE TRANSMITTER .......................................................................................................................... 17
4.2.1. MCR ICS DIGITAL DIFFERENTIAL PRESSURE TRANSMITTER ........................................................................................... 17
4.3. AUXILIARY COMPONENTS OF MCR EXI-F SYSTEM ........................................................................................................... 19
4.3.1. INTAKE VENT SWITCHING SYSTEM ................................................................................................................................ 19
4.3.2. DUCT SMOKE DETECTOR UG-3-A4 ............................................................................................................................... 20
4.3.3. MANUAL CONTROL PANEL (MCP) ................................................................................................................................ 21
5. WIRING SYSTEM .............................................................................................................................................................. 22
5.1. MCR OMEGA CONTROL SUPPLY UNIT ............................................................................................................................ 22
5.2. MCR EXI-F AIR SUPPLY UNITS ......................................................................................................................................... 23
5.3. MCR ICS PRESSURE TRANSMITTERS ................................................................................................................................. 24
5.3.1 MCR ICS DIGITAL PRESSURE TRANSMITTER ................................................................................................................... 24
5.4. DAMPER ACTUATORS ...................................................................................................................................................... 25
5.5. DUCT SMOKE DETECTOR .................................................................................................................................................. 26
6. TRANSPORT AND STORAGE ....................................................................................................................................... 27
7. MAINTENANCE AND SERVICING ................................................................................................................................ 27
8. WARRANTY TERMS AND CONDITIONS..................................................................................................................... 27

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1. INTRODUCTION _________________________________________________
This operation and maintenance manual (OMM) provides information on applications, design,
operation, installation and maintenance of mcr EXi-F smoke control system for escape routes.
This manual also includes additional information on operating conditions, maintenance and
warranty terms and conditions.
This manual applies to a group of devices operating as a smoke control pressure differential
systems for escape routes. Please follow the guidelines in this Operation and Maintenance Manual to
ensure user safety and failure-free device operation.
2. PRODUCT OVERVIEW ____________________________________________
This manual applies to mcr EXi-F positive-pressure smoke control system for escape routes.
The system includes a group of products selected and configured to establish a protected area with a
specific positive pressure in accordance with the design requirements. The system is manufactured by
„MERCOR” SA, ul. Grzegorza z Sanoka 2, 80-408 Gdańsk.
mcr EXi-F system components:
1. mcr Omega control unit (CU Omega);
2. mcr ICR pressure regulator (mcr Omega unit component);
3. air supply unit with accessories (dampers, intake vents, exhaust vents, grilles);
4. digital differential pressure transmitter mcr ICS
mcr EXi-F system auxiliary components:
1. manual control panel (MCP);
2. intake vent switching system (dampers with actuators);
3. duct smoke detectors;
4. mcr PL overpressure bleed damper (reduction of the system tightness – increase of
required leakage)
5. elevated control panel (ECP)
NOTE
This Operation and Maintenance Manual replaces all previous versions. This Operation and
Maintenance Manual does not apply to any devices manufactured before its issue date.

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3. SYSTEM APPLICATIONS __________________________________________
3.1. Applications ____________________________________________________
Smoke control in the escape routes is one of the most crucial fire prevention measures in the
building. Secure escape routes guarantees safe and efficient evacuation of people from fire-exposed
areas, facilitate fire-fighting operations and reduce damage caused by smoke, fire gases and products
of thermal decomposition.
mcr EXi-F kits control smoke in any protected area (staircases, lift wells, escape routes) by
creating positive pressure and thereby preventing smoke ingress. mcr EXi-F system can be used in
staircases with protected lobbies and is compatible with systems including at least one pressure
transmitter per protected area.
mcr EXi-F system consists of a configured set of devices preventing smoke ingress to the protected
area by increasing pressure.
Fig. 1. Example mcr EXi-F system diagram
Depending on the demand, air can be supplied to the protected area using either a single-point
or a multi-point air supply.
mcr EXi-F includes mcr ICR pressure regulator for the air supply unit control and does not
require safety relief valves to control pressure. The exhaust vents can be installed as an auxiliary
component in the protected area.
mcr EXi-F system devices can be used in pressure differential systems, where the air is
discharged from the fire-exposed floor using gravity vents or exhaust fan (smoke ventilation system).
fan
protected area
Constant
leakage
mcr Omega control unit
differential pressure
transmitter

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3.2. Operation ______________________________________________________
The system is managed by mcr Omega control unit (CU) including all the required components
(e.g. mcr ICR positive pressure regulator). Positive-pressure mcr EXi-F system is activated
automatically via SAP signal or manually via CU or the manual control panel. After detecting the fire in
the building, the air dampers of the air supply units are activated, and the air supply unit is activated
with a delay (necessary to open the shut-off dampers). After several seconds, the protected area is
filled with air to create the differential pressure between the protected area and the adjacent areas.
The required positive pressure is controlled by a variable air volume supplied to the protected
area by the air supply unit(s). Provided that the door to the protected area are closed, the main fan of
the air supply unit maintains a stable positive pressure. The actual pressure in the protected area is
measured and controlled by mcr ICS. The positive pressure in the staircase (20-80 [Pa]) guarantees
that the force required to open the exit door does not exceed 100 [N]. Opening the door results in
pressure drop in the protected area, thus increasing the fan speed and providing the design air flow
rate through the door separating protected and non-protected areas.
For the air flow rate to reach the required value, air relief is provided using one or more of the
following:
- opening in the external wall (e.g. automatically doors – mcr OSO system, grilles),
- vertical air vent shaft with vents in the adjacent areas (e.g. mcr FID S, mcr WIP, mcr WIP PRO)
are connected to the common vertical shaft for discharging the smoke at the top of the building,
- mechanical exhaust with a proper design and control system.

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Fig. 2. Example positive pressure mcr EXi-F system

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Fig. 3. Example air supply to the protected area diagram
Fig. 4. Example positive pressure system for lift shaft
air supply fan with damper and
smoke detector
air supply fan with damper and
smoke detector air supply fan with damper and
smoke detector
mcr Omega control unit mcr Omega control unit
mcr Omega control unit
air supply fan with
damper and
smoke detector
CORRIDOR STAIRCASE STAIRCASE CORRIDOR CORRIDOR
STAIRCASE
a) single
-
point air supply
b) two-point air supply c) multi-point air supply
air supply fan with damper and
smoke detector
mcr Omega control
unit
CORRIDOR
LIFT WELL

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3.3. System selection guide ___________________________________________
mcr EXi-F systems should be installed in accordance with the design developed for a specific
building to one of the following design requirements:
 PN-EN 12101-6:2007 Smoke and heat control systems. Part 6: Specification for pressure
differential systems. Kits.
 NFPA 92A Standard for Smoke-Control Systems Utilizing Barriers and Pressure Differences,
2012 Edition;
 ITB No. 378/2002 Designing fire ventilation systems of escape routes in high and high-rise
buildings.
and:
 the Regulation of the Minister of Infrastructure of 12 April 2002 on technical conditions for
buildings and their location. Dz.U. No. 75 of 2002, item 690 as amended;
 Technical Approval ITB-KOT-2021/1788.
4. SYSTEM COMPONENTS __________________________________________
4.1. mcr Omega control unit ___________________________________________________
Applications _______________________________________________________
mcr EXi-F pressure differential system kit uses mcr Omega control unit; the unit is compatible
with an analog and digital pressure regulators and a frequency converter (inverter). The control unit is
used for controlling and monitoring mcr EXi-F pressure differential system components. The device
carries out all the required control and operation procedures for the differential pressure system,
including timer function of the smoke exhaust fan control.
The unit can also be used as a controller for fire divisions. All the functions related to the
positive pressure and fire divisions are controlled by the control unit.

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Fig. 5. Example mcr EXi-F system control configuration diagram
Operation __________________________________________________________

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The automatics used in mcr Omega unit control, supply, monitor and visualize operation of all
mcr EXi-F kit components.
Fig. 6. mcr Omega control unit - general view
Main control unit (CU) tasks:
 power supply, control and monitoring of the air supply fans for positive pressure via signals from
the fire alarm control panel (FACP),
 power supply, control and monitoring of the air control and shut-off dampers, unit maintain
dumpers power supply
 power supply and operation of the duct smoke detector (used optionally).
 power supply, control and monitoring of dampers used in differential pressure system.
The control unit is supplied with 3 x 400 V. The control unit is powered by an incoming panel for
fire protection equipment, which is not being disconnected with a fire switch or is equipped with an
automatic reserve power switch (ARPS) in buildings, where no incoming panel for fire protection
equipment is available in the main switchboard.
mcr Omega control unit is delivered in powder coated on stainless steel enclosure with front
door and IP55 protection rating (external and internal version available). The door is fitted with a
gasket, lock or rotary lock with a key. Depending on its version, a cover with cable glands is available
at the top or at the bottom of the device. The number and location of cable glands depend on the
system size and the number of controlled and supplied external devices. The device dimensions vary
from 300 x 200 x 150 mm to 1200 x 2000 x 300 mm depending on the number of controlled devices
and the complexity of operations and switching program. A visualization panel with FACP power
supply, alarm and failure indicators is mounted on the door.

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Table 1. mcr Omega control unit specifications
Main supply voltage: 400 V AC +10%. –15%, 50 Hz
Reserve power supply*
Emergency power supply in the building
Certified fire protection power supplies
Internal ATS (optional).
Backup power: Lead-acid batteries, AGM
Battery capacity: 2,2Ah-40Ah
Reserve power supply time: 72h
Alarm configuration: Single stage (2nd stage)
Enclosure protection rating: IP 54
Environmental class: III (with temperature extension up to -25°C)
Operating temperature range: -250C +750C
Unit working voltage: 22.5 V ..... 32 V AC (24 V at 200C)
Enclosure material: Powder coated or stainless steel
Dimensions (L x W x H) Type series:
from 300x200x150 up to 1200x2000x300
Environmental conditions:
- temperature range from -25
0
C up to +75
0
C (-25
0
C
with heating, +750C with internal ventilation)
- relative humidity:90%
- protection (e.g. by roofing) against precipitation and
solar radiation is required in external use
* power supply and control of smoke control devices and fire divisions which require auxiliary power supply as per relevant regulations
Control unit components depending on the system size:
 automatics and control block with advanced microprocessor monitoring and control modules
(mcr MMS) and intelligent mcr ICR positive pressure regulator module,
 power supply block (power supply with batteries),
 frequency converter (inverter),
 overcurrent protection and three-phase contactors,
 mcr ICR positive pressure regulator (compatible with mcr ICS)
The unit monitors fan supply line continuity also at standstills, interruptions or short-circuit.
mcr ICR positive pressure regulator controls fan speed via a three-phase inverter to maintain
set positive pressure (20 – 80 Pa) in the protected area. Measured pressure signal is transmitted from
the differential pressure sensor to the regulator via a distributed network. To determine the building
model, the regulator uses special algorithm for precision control in the environment with unknown or
impossible to determine characteristics.
Fig. 7. mcr ICR pressure regulator - general view

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The following lights indicate pressure regulator failures and alarms:
 MCR BUS 1,
 MCR BUS 2,
 ADAPTATION,
 IN,
 SENSOR.
The alarm light goes on when a failure is detected. Light off indicates correct operation. MCR
BUS 1 and MCR BUS 2 indicate failure of the communication bus connecting the system components.
Both lights ON indicate major failure of the communication bus. ADAPTATION indicates incorrect
pressure regulator adaptation, and if ON, the pressure regulator requires adaptation. IN indicates
discontinuity of the alarm line connected to DI+ and DI-. SENSOR indicates failure of one of the system
sensors.
Detailed information on detected failures are available via a built-in service interface.
Other errors can be indicated by short-circuiting O and CM terminals (relay output). The
terminals are short-circuited when an error is detected.
The following lights indicate regulator status:
 POWER,
 STATUS.
POWER is always on when the power is supplied to the device.
STATUS is always on in standby mode (awaiting an event) or flashing to indicate fire.
Emergency control procedure is activated by FACP signal input with specific parameters.
Omega CU requires FACP signal as a voltage free NC switch contact (contact state for operation in
standby mode). The contact should be bridged with the end of line resistor to ensure line continuity
monitoring. At standby, MMS controller awaiting for FACP signal reads zero resistance at its input and
treats it as no alarm. If the contact is opened, the controller reads the resistor resistance and executes
a program stored in its memory. If the resistance at the controller input increases to infinity, the unit
treats it as a failure, indicates the status with controller lights and transmits a signal.
After installing and checking the correct operation of all system components, the system
starts the adaptation procedure. Pressure regulator operation parameters and adaptation
procedure are performed by „MERCOR” or an authorized service centre.
The control unit cooperates with the fire control panels as per the following procedure: receive
signal to activate the fire program (hardwired signal), transmit control unit failure signal to FACP
(hardwired signal), confirm control procedure of connected devices by the control unit to FACP
(hardwired signal).
Unit inputs and outputs (all lines) are continuously monitored by the end of line resistors for
interruptions, short-circuit and time parameters of activation of all connected devices.
The unit door is fitted with a visualization panel with lights indicating:
 power supply status (green light on - power supply on);
 failure/error (yellow light off - correct unit operation);
 FACP alarm (red light off - no FACP alarm);
 "Reset" button (alarm reset), press and hold for
approx. 5 seconds to return to the unit's initial state (standby). No FACP signal can be
present at the alarm input(s).
All units have a "Test" button. During the test, the unit executes alarm procedure stored in its
modules/controllers for a specific fire scenario. After the test, the unit waits for 10 seconds, and
irrespective of the results sets its outputs to initial state to set the external devices in alarm standby
mode. Check each signal individually if there are several FACP alarms and related TEST buttons.

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NOTE
The method of mcr Omega unit operation depends on the diagram and program for
controlled devices. Detailed wiring diagrams, dimensions, number and type of components
used result from the design requirements for a specific building and are included as annexes to
this Operation and Maintenance Manual.
Power supply lines of the electric actuators connected to the control supply unit, alarm
signal lines from FACP unit are continuously monitored by the unit. The lines for feedback
transmitted by the unit to other systems should be monitored by those systems.
4.2. mcr EXI-F air supply units __________________________________________________
mcr EXi-F air supply units include the following components:
a) axial fan in a box type housing with optional accessories;
mcr EXI-F air supply unit
a) multi-blade damper with BLF/BF/BFL/BFN, BLE/BE, NMQ/LMQ/SMQ, NF/SF or MF/MLF series
actuator;
b) duct smoke detector (optional);
c) mcr LAM exhaust vent (vertical installation of fans in box housing, converging pipe with flange,
beveled duct with grille.
mcr EXi-F air supply units include mcr Monsun E1 series axial fans in a box type housing. Air
supply fans are characterized by high efficiency at low pressures. The task of the fans is to transport
the appropriate amount of air to ensure that the design requirements are met.
The fans can be installed indoors and outdoors in horizontal or vertical position.
mcr Monsun E1 series air supply fans are made in a box casing with an internal mineral wool
insulation layer. The box is equipped with connection flanges. A service switch is installed on the
casing of the mcr Monsun E1 fan, to which electric cables from the engine are connected.
Fig. 8. mcr Monsun E1 fan in box type housing
(1 - box housing with acoustic insulation, 2 – axial impeller, 3 - motor base bracket, 4 – motor base 5 - motor, 6 –
junction box)

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To reduce noise resulting from operation of the fan may be used noise suppressor. Suppersor's
casing is made of galvanized steel sheet, while the suppresor's core is made of perforated galvanized
steel sheet, with filling (insulation) made of acoustic mineral wool. Flexible connections are used to
eliminate vibrations transmitted by the fan to the ventilation system. For improved system operation
safety, it is recommended to protect the flexible connections (for outdoors installations) against birds
with a grille or a one-sided metal plate.
For vertical installation of the air supply unit outdoors, the unit is placed on the base/roof curb,
and the discharge side is connected to the air supply system. The suction side is protected against
weather conditions with mcr LAM louver vents (Fig. 13). The declared properties and features of LAM
vent (e.g. snow load SL 1300, wind load WL 1500) guarantee operation in extreme weather conditions.
For vertical installation indoors, the unit is mounted on the supporting structure and connected
to the air supply system in accordance with the design requirements.
mcr EXI-F air supply units include multi-blade dampers with actuator. The rotary mechanism of
the damper include gears and bearings or steel rods.
Table 2. mcr EXi-F air supply units - Hydraulic parameters
System type Fan type Power (kW)
Speed
(rpm)
Nominal
output (m3/h)
External static
pressure (Pa)
mcr EXi-F 100-1S mcr Monsun E 100-4T-20 15 1500 64500 200
mcr EXi-F 100-2S mcr Monsun E1 100-4T-15 11 1500 60000 200
mcr EXi-F 90-1S mcr Monsun E 90-4T-10 7.5 1500 45900 200
mcr EXi-F 90-2S mcr Monsun E1 90-4T-7,5 5,5 1500 40200 200
mcr EXi-F 80-1S mcr Monsun E 80-4T-5,5 4 1500 30500 200
mcr EXi-F 71-1S mcr Monsun E1 71-4T-4 3 1500 22000 200
mcr EXi-F 71-2S mcr Monsun E1 71-4T-1,5 1,1 1500 11500 200
mcr EXi-F 63-1S mcr Monsun E 63-4T-1,5 1.1 1500 9200 250

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Item System type H
mm]
S
[mm]
A
[mm]
B
[mm]
L1
[mm]
~L2
[mm]
L3
[mm]
L4
[mm]
~L5
[mm]
C
[o]
weight
[kg]
1 mcr EXi-F 100-1S 1200 1200 1100 1100 910 130 200 115 755 60 289
2 mcr EXi-F 100-2S 1200 1200 1100 1100 910 130 200 115 755 60 289
3 mcr EXi-F 90-1S 1200 1200 1100 1100 910 130 200 115 755 60 238
4 mcr EXi-F 90-2S 1200 1200 1100 1100 910 130 200 115 755 60 238
5 mcr EXi-F 80-1S 1000 1000 900 900 810 130 200 115 640 60 156
6 mcr EXi-F 71-1S 1000 1000 900 900 810 130 200 115 640 60 156
7 mcr EXi-F 71-2S 1000 1000 900 900 810 130 200 115 640 60 156
8 mcr EXi-F 63-1S 825 825 700 700 710 130 200 115 525 60 101
Item System type A[mm] B [mm] C [mm] D [mm] d [mm]
1 mcr EXi-F 100-1S 1200
1150 860 884 13
2 mcr EXi-F 100-2S 1200
1150 860 884 13
3 mcr EXi-F 90-1S 1200
1150 860 884 13
4 mcr EXi-F 90-2S 1200
1150 860 884 13
5 mcr EXi-F 80-1S 1000
950 760 784 13
6 mcr EXi-F 71-1S 1000
950 760 784 13
7 mcr EXi-F 71-2S 1000
950 760 784 13
8 mcr EXi-F 63-1S 825
775 660 684 13
Fig. 9. Dimensions and weights of mcr EXi-F air supply kit with fan in box housing

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Item System type A
[mm]
B
[mm]
~C
[mm]
~D
[mm]
P
[mm]
H
[mm]
~L
mm]
Weight
[kg]
1 mcr EXi-F 100-1S-H 1200 1200 1300 1300 300 750 320 376
2 mcr EXi-F 100-2S-H 1200 1200 1300 1300 300 750 320 376
3 mcr EXi-F 90-1S-H 1200 1200 1300 1300 300 750 320 326
4 mcr EXi-F 90-2S-H 1200 1200 1300 1300 300 750 320 326
5 mcr EXi-F 80-1S-H 1000 1000 1100 1100 300 650 320 228
6 mcr EXi-F 71-1S-H 1000 1000 1100 1100 300 650 320 228
7 mcr EXi-F 71-2S-H 1000 1000 1100 1100 300 650 320 228
8 mcr EXi-F 63-1S-H 825 825 945 945 300 550 320 157
Fig. 10. Dimensions and weights of mcr EXi-F air supply kit with fan in box housing
Fig. 11. Example mcr EXi-F air supply unit in wall-mounted version (installation indoors)
(1 - fan in a box housing, 2 - flexible connection, 3 - damper with actuator, 4 - air intake, 5 - vibro-isolating pad or
shock absorbers, 6 - smoke detector, 7 - supporting structure, 8 - protective mesh)

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Fig. 12. Example mcr EXi-F air supply unit in wall-mounted version (installation outdoors)
(1 - fan in a box housing, 2 - flexible connection, 3 - damper with actuator, 4 - air intake, 5 - vibro-isolating pad or
shock absorbers, 6 - smoke detector, 7 - supporting structure, 8 - protective mesh)
Fig. 13. Example horizontal installation of mcr EXi-F air supply unit
(1 - fan in box housing, 2 – ventilation duct, 3 – damper,
4 – duct smoke detector, 5 – flexible connector, 6 – fan inlet protection, 7 – junction box, 9 – noise suppresor)
4.2. Differential pressure transmitter ____________________________________________
4.2.1. mcr ICS digital differential pressure transmitter ______________________________
The device measures differential pressure in a protected area at increase pressure (staircases,
lift shafts, protected lobbies, exit access corridors). The device should be connected to two pressure
line. The measurement results are transmitted in real time via a digital interface to the regulator
controlling fan operation (via an inverter).

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Fig. 14. mcr ICS digital pressure transmitter - general view
mcr ICR pressure regulator can be connected to 24 mcr ICS digital pressure transmitters. The
system components communicate via mcr BUS with high throughput and providing the highest safety
level. mcr BUS is a multi-master type bus where the data can be transmitted anytime by any device
connected to the bus, and each transmitter may immediately notify the pressure regulator on any
failure or alarm signal.
The components are connected in a loop to guarantee efficient operation of the entire system in
case of a single communication cable failure.
The line continuity is continuously monitored. The pressure converters send periodical status
information to the regulator to ensure continuous monitoring of the system status and detection of the
following failures:
 line discontinuity,
 mcr ICS digital pressure transmitter removed or faulty
 alarm input discontinuity for mcr ICS,
 digital pressure transmitter failure for mcr ICS.
The pressure source is connected via a flexible 8 mm dia. pressure line (5 m pressure line included
with the pressure transmitter).
Table 3. mcr ICS pressure transmitter specification
Power supply 24±15% [V], AC/DC
Protection Internal safety fuse, 140 [mA]
Operating temperature -25÷55 [C]
Enclosure protection rating IP44
Dimensions 135 mm x 135 mm x 65 mm
Installation To flat surface with 2 screws
Cable grommets Grommets - 4 PG11 cable glands with seal.
Electrical connection Maximum wire diameter 2.5 [mm²], max. 1 wire per
terminal
Pressure connection Pressure line connectors. Connectors outside the
enclosure, dia. 6 (mm)
Output Differential interface, distributed system, galvanic
separation mcr BUS driver
Sensor range Pressure -500 ÷ +500 (Pa)

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Maximum allowable positive
pressure 100 [kPa]
Measurement error +/-1.5 [%]
The following lights indicate the pressure transmitter alarms and failures:
 MCR BUS,
 PRESSURE,
 IN.
MCR BUS indicates the communication bus failure. PRESSURE indicates the pressure sensor
failure. IN indicates discontinuity of the alarm line connected to DI+ and DI-.
The following lights indicate the pressure transmitter status:
 POWER,
 STATUS.
POWER is always on when the power is supplied to the device. STATUS is always on when
awaiting an event or flashing when indicating fire.
4.3. Auxiliary components of mcr EXi-F system ________________
4.3.1. Intake vent switching system _____________________________________________
If the air inlets are at the roof level, two air inlets are required, distant from each other and
facing different direction to avoid leeward position in relation to the smoke source. Each inlet should
provide full air supply required by the system. All inlets should be protected by an independent system
of smoke control dampers (when one damper closes due to the smoke, another inlet will supply air
required by the system). The smoke is detected by the smoke detectors upstream of each damper.
An intake vent switching system with two opposed dampers and Belimo B(L)E actuators is
used.
Fig. 15. Basic dimensions of the air dampers used in two damper configuration
Item System type
Air damper
a
b
c
weight
[mm] [mm] [mm] [kg]
1 mcr EXi-F 100-1S 1100 1100 115 18.5
2 mcr EXi-F 100-2S 1100 1100 115 18.5
3 mcr EXi-F 90-1S 1100 1100 115 18.5
4 mcr EXi-F 90-2S 1100 1100 115 18.5
5 mcr EXi-F 80-1S 900 900 115 14
6 mcr EXi-F 71-1S 700 700 115 10
7 mcr EXi-F 71-2S 700 700 115 10
8 mcr EXi-F 63-1S 700 700 115 10

EXi-F positive pressure smoke control system
„MERCOR” S.A. – Specifications are subject to change without notice. Version DTR_EXIF_EN_20220516 Page 20 / 28
Fig. 16. Example mcr EXi-F air intake unit in roof-mounted version with two intake vents
(1 - fan, 2 – intake vent, 3 - vibration damper, 3 - flexible connector,
4 – dampers with actuators in two intake vent configuration, 5 - duct smoke detectors in external version)
4.3.2. Duct smoke detector UG-3-A4 _____________________________________________
If the air inlet is not at the roof level, in the inlet duct or directly near the air supply ducts, a
smoke detector for automatic deactivation of the pressure differential system should be provided in
case when large volumes of smoke are present in the supplied air.
If the air inlets are at the roof level, two air inlets are required (two intake vents configuration).
Each inlet must be protected by an independent damper system with a duct smoke detector installed
upstream.
Fig. 17. Duct smoke detector (from left): general view, dimensions, UG Cover (for built-in installation)