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Trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Alerton, BACtalk, and their logos are registered trademarks and VisualLogic is a trademark of Honeywell Intl. Honeywell Intl. disclaims any proprietary interest in trademarks and trade names other than its own.
System activation Dedicated systems and non-dedicated systems System implementation Building equipment and controls HVAC air-handling systems Controls Chapter 3: Alerton smoke control solutions Basic smoke control approach Smoke control components BTI-S global controller VLC-1188-S field controller VLC-16160-S field controller VAV-SD-S field controller...
Alarm Control Units, as described in Standard UL 864. This document describes general smoke control concepts and practices based on NFPA 92A. It also describes the function and interconnection of Alerton products with other smoke control equipment and HVAC equipment.
BACtalk Systems Chapter 3 Alerton smoke control solutions This chapter describes Alerton’s approach to smoke control and the Alerton components that can be used to perform smoke control functions. This chapter provides examples of how Chapter 4 Smoke control applications to implement smoke control systems using Alerton components.
Smoke control: an overview The information in this chapter is based upon the recommended practices described in NFPA 92A, Recommended Practice for Smoke-Control Systems, 2000 Edition. For complete information, refer to that document. All fires produce smoke, which can spread through a building, causing property damage and potentially endangering life.
Smoke Control System Guidelines BACtalk Systems What is a smoke control system? An overall smoke control system is a complete system engineered to accommodate a specific installation. Either the smoke control system designer or another responsible party should provide a specific installation diagram that shows how to connect smoke control equipment to the HVAC and other system equipment.
Smoke Control System Guidelines Systems and applications Pressure differences Air pressure differences provide the mechanism that contains smoke within the smoke zone and prevents smoke from moving into other zones. NFPA 92A provides guidelines for recommended pressure differences across smoke barriers and doors. The pressure differences that smoke control systems produce can fluctuate due to the wind, fan pulsations, doors opening, doors closing, and other factors.
Smoke Control System Guidelines BACtalk Systems During smoke control operation, the functions of the air handler change. The system may drive the outdoor and exhaust air dampers fully open and the return air damper fully closed to provide the maximum amount of outdoor air and building exhaust, which are used for smoke control and evacuation.
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Smoke Control System Guidelines Systems and applications • Different types of supply air fans have varying advantages and limitations, depending on the system design. For example, in a simple single-point injection system, a propeller fan mounted on the roof or an exterior wall can supply air to stairwells.
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Smoke Control System Guidelines BACtalk Systems A zoned smoke control system uses mechanical fans to produce pressure differences and airflows that limit smoke movement from the zone where the fire started. Concentrating the smoke in this smoke zone can make the area untenable.
Smoke Control System Guidelines Building equipment and controls Building equipment and controls HVAC systems typically provide a means of supplying, returning, and exhausting air from a conditioned space. Most HVAC systems can be adapted for zoned smoke control. To provide smoke control, HVAC systems use outside air to produce pressure differences across barriers.
Smoke Control System Guidelines BACtalk Systems Fan-powered terminal systems receive variable air volumes of primary cooled air and return air. This air combines in the terminal unit to provide a constant volume of supply air to occupied spaces. For smoke control, terminal unit fans located in the smoke zone should be shut off, and the primary air damper should be closed.
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Smoke Control System Guidelines Building equipment and controls The total response time required for individual components to reach their desired state or operational mode should not exceed the following: • Fan operation at the desired state: 60 seconds • Completion of damper travel: 75 seconds Firefighters’...
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Smoke Control System Guidelines BACtalk Systems Each smoke control system configuration should be defined in a schedule format that includes, at a minimum, these parameters, which are included in NFPA 92A: • Fire zone in which a smoke control system automatically activates •...
Alerton manufactures components that meet UL 864/UUKL requirements for use in smoke control system equipment and provides information for others to use in the actual design and installation of the system. Alerton does not design smoke control systems. It is the designers’ and installers’ responsibilities to ensure that a specific smoke control system meets the requirements of the local authority having jurisdiction (AHJ).
Smoke control components Smoke control systems are very complex. Their design should be undertaken only by qualified engineers. This section describes the UL Listed Alerton components that engineers can incorporate into the design of a smoke control system: • BACtalk Integrator-S (BTI-S) •...
(Up to 64 devices) Figure 2 Alerton offers five key building blocks for a smoke control system: a BTI-S global controller and four field controllers, the VLC-1188-S, VLC-16160-S, VAV-SD-S, and VAV-DD7-S. Note that multiple secondary BTI-S controllers can be incorporated into a smoke control system.
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Smoke Control System Guidelines BACtalk Systems The BTI-S provides a MODBUS interface to the FSCS, using an EIA-422 serial connection. The BTI-S also includes an application to print data during a smoke control event. A serial printer connects to the EIA-232 port on the BTI-S. The following information can be found in the BTI-S Installation and No te Operations Guide (LTBT-TM-BTIS) and BTI-S data sheet (LTBT-BTI-S):...
• Impedance values for testing at which open faults, short circuit faults, and ground faults prevent normal operation per ULC S527-99 Alerton smoke control products offer short circuit protection on all binary No te outputs. After a short circuit event, always cycle a binary output off and back on to reset the protection devices and ensure proper operation.
Smoke Control System Guidelines BACtalk Systems VLC-16160-S field controller The VLC-16160-S is a high-performance, fully programmable logic controller designed for central plant systems, lighting panels, and other applications with numerous control points. As a native BACnet controller, the VLC-16160-S integrates seamlessly with your BACnet system, communicating at up to 76.8 Kbps on a BACnet MS/TP LAN.
HVAC equipment. Alerton smoke control components are designed to work with a UUKL Listed Firefighters’ Smoke Control Station. Each job will require working directly with the FSCS manufacturer to produce a panel applicable to the specific project.
• Correct mounting, orientation, and clearances • Recommended wiring methods and guidelines • Electrical ratings of input power and extended circuits Alerton does not manufacter or sell FSCS equipment. For details about ordering an FSCS, see “FSCS ordering information” on page 55. Ethernet switch Whenever UL 864 Listed equipment is used in a system with equipment that is not UL 864 Listed, UL requires a robust connection between these subsystems.
56. Other system components Other components that UL finds suitable in combination with Alerton smoke control components may be used in a particular project. For example, a smoke control system may include a Fire Alarm Control Unit and smoke dampers, which are available from a variety of vendors.
• The BTI-S requires an ungrounded, full wave transformer. Network isolation Network isolation considerations and guidelines include: • Use only Alerton VLCs that are UL Listed Smoke Control System Equipment to connect to any BTI-S that is part of the smoke control system.
For example, a differential pressure switch or flow station monitors a fan and returns a signal to the system. Alerton equipment provides for a self-test for end-process verification and a trouble signal upon failure of intended operation. This self-test would be a part of the DDC programming for the system.
The following illustrations show typical installation connections for FACU to FSCS, BTI-S, VLC-1188-S, VLC-16160-S, VAV-SD-S, and VAV-DD7-S. IMPORTANT! You must use a transformer that has been UL tested and approved for use with Alerton smoke products. See “Transformer selection information” on page 56. TYPICAL INSTALLATION CONNECTIONS...
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Figure 4 Typical VLC-1188-S power and communications connections. (See VLC Installation & Wiring Guide (LTBT-TM-VLC) for wiring details. See “Transformer selection information” on page 56. for model details.
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Typical power and communications connections for VAV-SD-S. (See VLC Installation & Wiring Guide (LTBT-TM-VLC) for wiring details.) IMPORTANT! You must use a transformer that has been UL tested and approved for use with Alerton smoke products. See “Transformer selection information” on page 56.
Smoke Control System Guidelines BACtalk Systems Typical sequence of operation (zone control) As shown in Figure 10, the FACU (1) responds to a fire signaling device (FSD) by closing relay contacts corresponding to the zone in alarm. The FSCS (2) detects this contact closure, which is communicated to the primary BTI-S (3) over EIA-422 MODBUS.
When all smoke condition indicators have been cleared and the FSCS is returned to automatic mode, the system returns to normal operation. For more information on programming Alerton system components to perform smoke control, see “Smoke control programming” on page 49.
Smoke control applications The applications described in this chapter are provided as guidelines. They must be reviewed and modified to fit the specific installation and project requirements for a particular building. It is the system designer’s responsibility to complete the system’s mechanical design and validate the design’s concept.
Smoke Control System Guidelines BACtalk Systems Warehouse example This section describes how a smoke control solution might be implemented in a warehouse application. This example describes guidelines for a zoned smoke control system installed in a single-story warehouse. The warehouse has four smoke control zones; each zone has its own air handling unit and each zone is separated from the other by smoke barriers.
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Smoke Control System Guidelines Warehouse example trigger the end switch, which the primary BTI-S detects, the BTI-S commands the appropriate LED on the FSCS. 2. The supply fans for the AHUs in all other zones (1, 2 and 4) are commanded ON, and the return fans are commanded OFF.
Smoke Control System Guidelines BACtalk Systems Figure 12 FSCS layout for warehouse example Warehouse smoke control system components In this example, the warehouse incorporates the following components, which are used to perform smoke control functions. For more information, see “Smoke control components”...
Smoke Control System Guidelines Warehouse example Implementing the solution You should define each smoke control mode in a table or schedule, which lists all dedicated and nondedicated equipment and explains the appropriate equipment response for each smoke alarm condition. Table 1 shows a sample schedule that might be used for this example when zone 3 is in smoke alarm.
Smoke Control System Guidelines BACtalk Systems High-rise example This section describes how a smoke control solution might be implemented in a high-rise application. This example describes guidelines for a smoke control system in an eight-story building. Two types of smoke control systems are used in this scenario: stairwell pressurization and zoned smoke control.
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Smoke Control System Guidelines High-rise example PENTHOUSE AHU VLC-1188-S AHU Controller EXHAUST AIR OUTSIDE AIR DAMPER DAMPER RETURN AIR DAMPER SUPPLY FAN RETURN FAN STAIRWELL #1 STAIRWELL #2 7TH FLOOR SD-S DEDICATED EXHAUST AIR DAMPER SUPPLY DAMPER SD-S 6TH FLOOR SD-S DEDICATED EXHAUST AIR DAMPER...
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Smoke Control System Guidelines BACtalk Systems 2. The dedicated exhaust air dampers for all floors except the fourth are closed. The dedicated exhaust air damper for the fourth floor is opened. The dedicated supply air damper for the fourth floor is closed. The dedicated supply air dampers for all other floors are commanded open.
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Smoke Control System Guidelines High-rise example FIRE FIGHTERS SMOKE CONTROL STATION EXHAUST AIR DAMPER OUTSIDE AIR DAMPER 8TH FLOOR CLOSED OPEN CLOSED OPEN AUTO AUTO CLOSED CLOSED OPEN OPEN RETURN AIR DAMPER RETURN FAN SUPPLY FAN CLOSED OPEN AUTO OPEN CLOSED AUTO AUTO...
Smoke Control System Guidelines BACtalk Systems High-rise smoke control system components In this example, the high-rise building incorporates the following components, which are used to perform smoke control functions: • Fire alarm control unit • Firefighters’ Smoke Control Station • Primary BTI-S •...
Smoke Control System Guidelines High-rise example Dedicated stairwell pressurization fans are also controlled by a VLC-1188-S or a VAV-SD-S. A flow switch monitors the status of each fan. These fans are considered dedicated smoke control equipment and are always OFF unless commanded ON during a smoke control scenario or during weekly testing.
The primary difference between using Alerton equipment to provide smoke control and other vendors is the system architecture, including network types and the programming environment. Alerton uses Ethernet and MS/TP networks, both of which are BACnet-supported networks.
In some cases, smoke detectors that are part of the smoke control system, but not part of the fire alarm system, may be connected to Alerton UL 864 approved VLCs, which in turn are connected over the network to the primary BTI-S. The primary BTI-S can then command the status of a corresponding LED or audible signal on the FSCS.
Smoke Control System Guidelines Programming overview Each switch status from the FSCS panel is automatically written to the Present Value of the corresponding BV in the BTI-S at Priority Array Index 1. The BTI- S interprets information from these BVs and initiates the appropriate actions on the controllers.
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Smoke Control System Guidelines BACtalk Systems Similarly, the BTI-S uses AVs in the range of AV-0 to AV-799 to command the status of LEDs and audible signals on the FSCS. The LEDs and audible signals can then be commanded to four different states, depending on the value of the corresponding AV as show in the following table.
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Smoke Control System Guidelines Programming overview Use the following guidelines to set up and configure the alarm, using the BACtalk operator workstation software: • Set up an alarm handler that includes an alphanumeric pager as a recipient. You can add workstations to the list of recipients in the alarm handler.
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Automation Displays, Inc. manufactures an FSCS with MODBUS that is compatible with the Alerton BTI-S. You will be ordering an FSCS panel from the series ALR-xxxxx. This will ensure the proper MODBUS support.
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System designers can specify any UL Listed printer that supports a serial connection. The OKI Data Microline 320 Turbo printer (with separate serial card) was tested with Alerton system components. In addition, you may need to order a 9-pin EIA-232 cable to connect the printer to the BTI-S. For more...
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