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

EXi-F positive pressure smoke control system
„MERCOR” S.A. – Specifications are subject to change without notice. Version DTR_EXIF_EN_20220516 Page 3 / 28
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.

EXi-F positive pressure smoke control system
„MERCOR” S.A. – Specifications are subject to change without notice. Version DTR_EXIF_EN_20220516 Page 4 / 28
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

EXi-F positive pressure smoke control system
„MERCOR” S.A. – Specifications are subject to change without notice. Version DTR_EXIF_EN_20220516 Page 5 / 28
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.

EXi-F positive pressure smoke control system
„MERCOR” S.A. – Specifications are subject to change without notice. Version DTR_EXIF_EN_20220516 Page 6 / 28
Fig. 2. Example positive pressure mcr EXi-F system

EXi-F positive pressure smoke control system
„MERCOR” S.A. – Specifications are subject to change without notice. Version DTR_EXIF_EN_20220516 Page 7 / 28
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

EXi-F positive pressure smoke control system
„MERCOR” S.A. – Specifications are subject to change without notice. Version DTR_EXIF_EN_20220516 Page 8 / 28
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.

EXi-F positive pressure smoke control system
„MERCOR” S.A. – Specifications are subject to change without notice. Version DTR_EXIF_EN_20220516 Page 9 / 28
Fig. 5. Example mcr EXi-F system control configuration diagram
Operation __________________________________________________________

EXi-F positive pressure smoke control system
„MERCOR” S.A. – Specifications are subject to change without notice. Version DTR_EXIF_EN_20220516 Page 10 / 28
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.