What is a Fire Alarm System?

  • The main purpose of a fire alarm system is to protect life n The main purpose of a fire alarm system is to protect life and property by giving early warning of a fire, so that the occupants can evacuate and/or the Fire Department can respond. respond.
  • A system must be able to detect the initiation of a fire condition, but also notify someone such as emergency condition, but also notify someone such as emergency personnel, the occupants of the facility, or both.
Fire Alarm System Components
  • Fire Alarm Control Panel (FACP)
  • Initiating Devices
  •   Notification Appliances
  • Emergency Control
  •  Supplementary Equipment
Fire Alarm Control Panel (FACP)
  • The control unit, or “panel“ is the brain of the system. It receives information from environmental sensors designed to detect changes associated with smoke or fire, monitors them, and provides for automatic control of equipment, and the transmission of information necessary to prepare the structure for fire based on a predetermined sequence. The panel supplies electrical energy to operate any associated initiating device, control relay, notification appliance, or transmitter. One of the most important uses of the control unit is to signal notification appliances to turn on in order to notify building occupants of the need to evacuate or relocate
  • Fire Alarm Control Panel Components :
    • Control Unit n Control Unit
    • initiating Device Circuits (IDCs)
    • Notification Appliance Circuits (NACs)
    • Auxiliary Circuits
    • Power Supply
Initiating Devices
  • Initiating devices provide an input to the fire alarm control unit and are either manually actuated, such as with a manual fire alarm box, also called a pull station, or automatically actuated, such as with a smoke detector and heat detector
  • Initiating Devices Types :
    • Manual Stations
    • Automatic Fire Detectors
      • Heat Detectors
      • Smoke Detectors
      • Gas Detectors
      • Water Flow  
    • Supervisory Switches
      • Sprinkler Valve Tamper
      • Tank Water Level
Notification Appliances
  • Notification appliances (such as a flashing light, strobe light, siren, horn, speaker, or a combination of these) use energy supplied from the fire alarm system to inform the occupants of the need to respond in some way, usually to evacuate the structure
  • Notification Appliances Types:
    • Audibles
      • Horns
      • Bells/Chimes
      • Speakers
    • Visuals
      • Xenon Strobes
        • Non-synchronized
        • Synchronized
    • Combination Devices
    • Firefighter’s Telephones