Fire Alarm system requirements

Fire Alarm system Non-coded, UL Listed intelligent analog addressable system, one-way voice communications with multiplexed signal transmission and survivable network nodes.

Building codes and standards

§  National Fire Protection Association (NFPA):

­   NFPA‑70         National Electrical Code (NEC)

­   NFPA-72         National Fire Alarm Code

­   NFPA 101        Life Safety Code

­   IBC                International Building Code

­   IFC                International Fire Code

­   IMC               International Mechanical Code

§  National Electrical Manufacture’s Association  (NEMA)

§  Underwriters Laboratories, Inc.  (UL)

­   UL-864           Control Units for Fire Protective Signaling Systems (9th Edition)

­   UL-268           Smoke Detector for Fire Protective Signaling Systems

­   UL-217           Smoke Detectors for Single and Multiple Station

­   UL-521           Heat Detectors for Fire Protective Signaling Systems

­   UL-464           Audible Signaling Appliances

­   UL-1971         Visual Signaling Appliances

­   UL-38             Manually Actuated Signaling Boxes

­   UL-1481         Power Supplies for Fire Protective Signaling Systems

­   UL 2572         Control and Communication Units for Mass Notification Systems

Systems operational description

§  Mass Notification initiated event shall override any event and take the highest system priority.

§  Fire-alarm signal initiation shall be by one or more of the following devices:

­   Manual stations.

­   Heat detectors.

­   Flame detectors.

­   Smoke detectors.

­   Duct smoke detectors.

­   Verified automatic alarm operation of smoke detectors.

­   Automatic sprinkler system water flow.

­   Heat detectors in elevator shaft and pit.

­   Fire-extinguishing system operation.

­   Fire standpipe system.

§  Fire-alarm signal shall initiate the following actions:

­   Activate three multiple channel pre-recorded voice messages.

­   Continuously operate the visual notification appliances.

­   Identify alarm at fire-alarm control unit and remote annunciators.

­   Transmit an alarm signal to the remote alarm receiving station.

­   Unlock electric door locks in designated egress paths.

­   Release fire and smoke doors held open by magnetic door holders.

­   Switch heating, ventilating, and air-conditioning equipment controls to fire alarm mode.

­   Activate stairwell and elevator-shaft pressurization systems.

­   Close smoke dampers in air ducts of designated air-conditioning duct systems.

­   Recall elevators to primary or alternate recall floors.

­   Activate emergency shutoffs for gas and fuel supplies.

­   Record events in the system memory.

­   Record events by the system printer.

§  Supervisory signal initiation shall be by one or more of the following devices and actions:

­   Valve supervisory switch.

­   Low-air-pressure switch of a dry-pipe sprinkler system.

­   Elevator shunt-trip supervision.

§  System trouble signal initiation shall be by one or more of the following devices and actions:

­   Open circuits, shorts, and grounds in designated circuits.

­   Opening, tampering with, or removing alarm-initiating and supervisory signal-initiating devices.

­   Loss of primary power at fire-alarm control unit.

­   Ground or a single break in fire-alarm control unit internal circuits.

­   Abnormal AC voltage at fire-alarm control unit.

­   Break in standby battery circuitry.

­   Failure of battery charging circuitry

­   High or low battery charge.

­   Abnormal position of any switch at fire-alarm control unit or annunciator.

­   Fire-pump power failure, including a dead-phase or phase-reversal condition.

­   Low-air-pressure switch operation on a dry-pipe or pre-action sprinkler system.

­   Device level diagnostics, supervision of photo, ion and heat elements.


§  System Trouble and Supervisory Signal Actions:

­   Initiate notification appliance and annunciate at fire-alarm control unit and remote annunciators.  Record the event on system printer.