Fireguard U Training Series Episode 4 – Fire Alarm Events and Priorities

Fire Alarm Events

    1. FIRE – Highest priority, indicating a life-safety hazard event; Activates the building evacuation signals and, if so configured, directly or indirectly notifies the fire department and responsible building personnel. Common examples of FIRE devices:
      1. Manual (Pull) Station
      2. Smoke Detector (Sensor) – reacts to a specific concentration of airborne smoke particles
      3. Heat Detector (Sensor)
        1. Fixed Temperature – reacts to a specific set temperature (135°, 200°, etc.)
        2. The rate of rise – reacts to an abnormal rise in temperature
      4. Multi-Criteria Detector
        1. Smoke
        2. Heat
        3. Carbon Monoxide (CO) – not normally a FIRE event
      5. Water Flow – reacts to a flow of water in the fire sprinkler pipes following a sprinkler head activation
    1. SUPERVISORY – 2nd-highest priority, indicating a possible impairment to the effective operation of the fire detection or suppression system; Activates the panel and annunciator sounders only. If so configured, directly or indirectly notifies responsible building personnel.  Common examples of SUPERVISORY devices or events:
      1. Duct Detector – reacts to the high concentration of airborne smoke particles in HVAC ductwork; often shuts down the related air-handler(s).
      2. Carbon Monoxide Detector – reacts to high levels of CO
      3. Sprinkler Valve Tamper Switch – reacts when a fire sprinkler system valve begins to close.
      4. Low Air Switch – reacts to low air pressure in a dry sprinkler system
      5. Fire Pump Off-Normal Conditions; Commonly:
        1. Loss of Power
        2. Phase Reversal
        3. Fire Pump Running
    1. TROUBLE – Lowest priority, indicating a condition that could negatively affect the effective operation of a fire detection or suppression system if not addressed; Activates the panel and annunciator sounders only. If so configured, directly or indirectly notifies responsible building personnel.  Common trouble events:
      1. Electrical Faults
        1. Earth ground
        2. Open or short circuit
      2. Device communication failure
      3. Dirty smoke detector
      4. Power failure
        1. Primary system power
        2. Backup batteries
      5. Failure of the automatic remote monitoring system
      6. Fire Alarm System internal malfunctions or failures

 

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