Fire Detection, Alarm, and Suppression Systems

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Fire Detection, Alarm, and Suppression Systems

• Dustin N. Smith

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Local System

• Schools , Theaters

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Fixed-Temperature Heat Detectors

• Detect Heat by One or More of Three Primary
  Principles of Physics
• Expansion of Heated Material
• Melting of Heated Material
• 3. Changes in Resistance of Heated Material

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Fusible Devices/ Frangible bulbs

• Held in place by a solder with a known melting
  temp.
• Glass vial holds electrical contacts apart.

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Continuous Line Detector

• Spot Type
• Detect heat only
• Detect heat over a large area

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Bimetallic Detector

• Two metals that have different thermal expansion
  characteristics
• Utilizes a snap disk and microswitch

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Rate-of-Rise Heat Detectors

• Alarms when temperature rises 12 to 15 degrees
  per minute

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Smoke Detectors
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Fire-Gas Detector

• Monitors Carbon Dioxide and Carbon Monoxide
• More Discriminating
• Designed for Specific Fires

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Combination Detectors

• Fixed Temp./ Rate of Rise
• Heat/Smoke Detector
• Smoke/Fire-gas Detector

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Automatic Alarm Systems

• Monitored Systems
• Calls the Fire Department upon Alarm

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Auxiliary System

• Three Basic Types
• Local Energy System
• 2. Shunt System
• 3. Parallel Telephone System

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Remote Station System

• Connected to the Fire Department
  Telecommunications System
• Used Mostly in Volunteer Areas

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Proprietary System

• Used for Large Commercial, Industrial Buildings,
  High Rises, and Groups of Commonly Owned
  Buildings
• Always Staffed

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Central Station System

• Much like Proprietary system, except receiving
  point is not on the premises

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Auxiliary Services

• Shutting down or altering airflow in air vents
  for smoke control
• Closing smoke or fire-rated doors and dampers
• Overriding elevator controls

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Water Flow Alarms
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Sprinkler Systems
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Sprinkler Components
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