Term
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Definition
| Temperature of the surrounding environment |
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Term
| Americans with Disabilities Act (ADA) of 1990 - Public Law 101-336 |
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Definition
| A federal statute (US) intended to remove barriers — physical and otherwise — that limit access by individuals with disabilities. |
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Term
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Definition
| (1) Alarm actuated by heat, gas, smoke, flame-sensing devices, or waterflow in a sprinkler system conveyed to local alarm bells or the fire station. (2) Alarm boxes that automatically transmit a coded signal to the fire station to give the location of the alarm box. |
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Term
| Automatic Sprinkler System |
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Definition
| System of water pipes, discharge nozzles, and control valves designed to activate during fires by automatically discharging enough water to control or extinguish a fire. Also called sprinkler system. |
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Term
| Automatic Suppression Systems |
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Definition
| Sprinkler, standpipe, carbon dioxide, and halogenated systems, as well as fire pumps, dry chemical agents and their systems, foam extinguishers, and combustible metal agents that sense heat, smoke, or gas and activate automatically. |
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Term
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Definition
| System that connects the protected property with the fire department alarm communications center by a municipal master fire alarm box or over a dedicated telephone line |
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Term
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Definition
| Strip or disk composed of two different metals that are bonded together; used in heat detection equipment. |
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Term
| Central Station Alarm System |
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Definition
| System that functions through a constantly attended location (central station) operated by an alarm company. Alarm signals from the protected property are received in the central station and are then retransmitted by trained personnel to the fire department alarm communications center. |
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Term
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Definition
| Alarm-initiating device capable of detecting an abnormal condition by more than one means. The most common combination detector is the fixed-temperature/rate-of-rise heat detector. |
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Term
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Definition
| Fire-suppression system consisting of piping and open sprinklers. A fire detection system is used to activate the water or foam control valve. When the system activates, the extinguishing agent expels from all sprinkler heads in the designated area. |
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Term
| Dry-Pipe Sprinkler System |
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Definition
| Fire-suppression system that consists of closed sprinklers attached to a piping system that contains air under pressure. When a sprinkler activates, air is released that activates the water or foam control valve and fills the piping with extinguishing agent. Dry systems are often installed in areas subject to freezing. |
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Term
| Fire Department Connection (FDC) |
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Definition
| Point at which the fire department can connect into a sprinkler or standpipe system to boost the water flow in the system. This connection consists of a clappered siamese with two or more 2½-inch (65 mm) intakes or one large-diameter (4-inch [100 mm] or larger) intake. |
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Term
| Fixed-Temperature Heat Detector |
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Definition
| Temperature-sensitive device that senses temperature changes and sounds an alarm at a specific point, usually 135°F (57°C) or higher. |
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Term
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Definition
| Device used to detect gases produced by a fire within a confined space. |
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Term
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Definition
| Detection and alarm devices used in some fire detection systems (generally in high-hazard areas) that detect light/flames in the ultraviolet wave spectrum (UV detectors) or detect light in the infrared wave spectrum (IR detectors). Also called Light Detectors. |
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Term
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Definition
| Small glass vial fitted into the discharge orifice of a fire sprinkler. The glass vial is partly filled with a liquid that expands as heat builds up. At a predetermined temperature, vapor pressure causes the glass bulb to break, causing water to flow. |
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Term
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Definition
| 1) Connecting link device that fuses or melts when exposed to heat. Used in sprinklers, fire doors, dampers, and ventilators. (2) Two-piece link held together with a metal that melts or fuses at a specific temperature. Also known as Fusible Link |
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Term
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Definition
| Type of smoke detector that uses a small amount of radioactive material to make the air within a sensing chamber conduct electricity |
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Term
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Definition
| Outside stem and yoke valve; a type of control valve for a sprinkler system in which the position of the center screw indicates whether the valve is open or closed. Also known as outside screw and yoke valve. |
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Term
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Definition
| Automatic sprinkler designed for placement and operation with the head pointing downward from the piping. |
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Term
| Photoelectric Smoke Detector |
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Definition
| Type of smoke detector that uses a small light source, either an incandescent bulb or a light-emitting diode (LED), to detect smoke by shining light through the detector’s chamber. Smoke particles reflect the light into a light-sensitive device called a photocell. |
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Term
| Post Indicator Valve (PIV) |
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Definition
| A type of valve used to control underground water mains that provides a visual means for indicating “open” or “shut” position; found on the supply main of installed fire protection systems. |
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Term
| Preaction Sprinkler System |
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Definition
| Fire-suppression system that consists of closed sprinklers attached to a piping system that contains air under pressure and a secondary detection system; both must operate before the extinguishing agent is released into the system; similar to the dry-pipe sprinkler system. |
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Term
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Definition
| Alarm that sounds before a total flooding fire extinguishing system is about to discharge. This gives occupants the opportunity to leave the area. |
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Term
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Definition
| Fire protection system owned and operated by the property owner. |
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Term
| Protected Premises Alarm System |
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Definition
| (1) Alarm system that alert and notifies only occupants on the premises of the existence of a fire so that they can safely exit the building and call the fire department. If a response by a public safety agency (police or fire department) is required, an occupant hearing the alarm must notify the agency. |
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Term
| Rate-Compensated Heat Detector |
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Definition
| Temperature-sensitive device that sounds an alarm at a preset temperature, regardless of how fast temperatures change. |
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Term
| Rate-of-Rise Heat Detector |
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Definition
| Temperature-sensitive device that sounds an alarm when the temperature changes at a preset value, such as 12°-15°F per minute. |
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Term
| Remote Station Alarm System |
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Definition
| System in which alarm signals from the protected premises are transmitted over a leased telephone line to a remote receiving station with a 24-hour staff; usually the municipal fire department’s alarm communications center. |
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Term
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Definition
| Vertical water pipe used to carry water for fire protection systems above ground such as a standpipe riser or sprinkler riser. |
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Term
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Definition
| A sprinkler designed to be positioned at the wall of a room rather than in the center of a room. It has a special deflector that creates a fan-shaped pattern of water that is projected into the room away from the wall. Also called Wall Sprinkler. |
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Term
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Definition
| a device designed to sound an alarm when the products of combustion are present in the room where the device is installed. The alarm is built into the device rather than being a separate system. |
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Term
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Definition
| Alarm-initiating device designed to actuate when visible or invisible products of combustion (other than fire gases) are present in the room or space where the unit is installed. |
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Term
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Definition
| Waterflow device in a sprinkler system. The sprinkler consists of a threaded nipple that connects to the water pipe, a discharge orifice, a heat-actuated plug that drops out when a certain temperature is reached, and a deflector that creates a stream pattern suitable for fire control. |
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Term
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Definition
| Sprinkler that sits on top of the piping and sprays water against a solid deflector that breaks up the spray into a hemispherical pattern that is redirected toward the floor. |
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Term
| Wet-Pipe Sprinkler System |
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Definition
| Fire-suppression system is built into a structure or site; piping contains either water or foam solution continuously; activation of a sprinkler causes the extinguishing agent to flow from the open sprinkler. |
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