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SECT�ON 1—GENERA!INFORMATION
<br /> UL EX.5174 10-31-97 Page 1-2
<br /> DEFINITION OFTERMS(Continued)
<br /> Cooking Hazard Area:The cooking hazard area is defined as the Hood:A device provided for cooking appliances to direct and cap-
<br /> heated portion of the appliance where the actual cooking opera- ture grease-laden vapors and exhaust gases. It shall be construct-
<br /> tion is performed,such as the griddle plate,broiler grate,fryer pot, ed in a manner which meets the requirements of NFPA 96
<br /> wok pan, range burner grates, eic. Linear Length:The actual length of piping measured from center
<br /> Dedicated Nozzle Appliance Protection: Protection of cooking to center of fittings.
<br /> appliances with enclosed cooking hazards,such as upright broilers, Liquid Agent: A specially-formulated, aqueous solution of inor-
<br /> which cannot be protected with overlapping nozzles and therefore 9anic salts used for the knockdown and suppression of fire.
<br /> must be protected with nozzles dedicated to the appliance.
<br /> Maximum Length of Cooking Appliance:The maximum dimen-
<br /> Detector: A device which includes the detector bracket, detector sion, on any side, which may be protected with overlapping
<br /> linkage, and fusible link used for automatic operation of the fire Protection
<br /> suppression system.
<br /> Maximum Piping: Specified length of piping and number of fit-
<br /> Detector Linkage: A device used to support the fusible link tings which must not be exceeded for each system.
<br /> housed in a bracket.
<br /> Minimum Piping: Minimum length of distribution piping required
<br /> Distribution Piping:Piping which delivers the extinguishing agent between the agent tank outlet and a nozzle protecting a fryer,wok,
<br /> and water from the tank to each discharge nozzle. braising pan,tilt skillet,or range when only one nozzle is used with
<br /> Ducts(or Duct System):A continuous passageway for the trans- a tank.
<br /> mission of air and vapors which, in addition to the containment Nozzle: A device designed to deliver the liquid agent and water
<br /> components themselves, may include duct fittings, dampers, With a specific flow rate and stream oattern.
<br /> plerums, and/or other items or ai;handling eq�ipment.
<br /> Nozzle Aiming/Location Graph:A graph used as an aid in deter-
<br /> Electrostatic Precipitator (ESP): A device used to aid in the mining appliance nozzle location, nozzle aiming, and hazard zone
<br /> cleaning of the exhaust air This device may be installed at or near placement.The graph includes a hood side view with numbered
<br /> the base of the ventilation duct or it may be installed midway or at °�X"and"Y"axes.The graph may indicate appliance nozzle aiming
<br /> the end of the duct system. points either on the floor or at a given hazard surface height.
<br /> Equivalent Length: Length of distribution piping, defined in feet, Overlapping Protection: When discharge nozzles are spaced
<br /> which includes the actual length of pipe (measured from center to equally apart over one or more appliances requiring protection.
<br /> center of fittings) and a given pipe length value assigned to each Nozzles used in this manner provide area protection of eligible __--
<br /> fitting used that must be added to the overall pipe length sum. appliances within the protected area.Two types of overlapping pro-
<br /> Exhaust Plenum:The space enclosed by the filters and the por- tection is available full hood continuous protection and group
<br /> tion of the hood above the filters. protection
<br /> Full Hood Continuous Appliance Protection: Full hood contin- Pulley Elbow: A device used to change the direction of the wire
<br /> uous protection is overlapping nozzle appliance protection that rope which runs between.the regulated release mechanism and
<br /> covers the complete appliance line-up located under the total hood the detectors,the regulated release mechanism and the mechan-
<br /> length.All appliances under the hood are those which can be an ical gas valve, and/or the regulated release mechanism and the
<br /> ignition source of grease in the hood, grease removal device or remote manual pull station
<br /> duct. Pulley Tee: A device used to change the direction of two wire
<br /> Fusible Links: A fixed temperature heat detecting device ropes which run from the regulated release mechanism to two
<br /> employed to restrain the operation of a mechanical control until its remote manual pull stations,or from two regulated release assem-
<br /> designed temperature is reached. When the link reaches its set blies to a single mechanical gas valve.
<br /> temperature, a solder connection, keeping two link halves intact, Regulated Actuator Assembly:An assembly which contains the
<br /> melts.The link's separation allows slack in a tensioned wire to trig- regulator,water flow valve,anti-siphon vacuum breaker, pneumatic
<br /> ger the release mechanism. actuator, and expellant gas hose within a metal enclosure. This
<br /> Gas Valve: A device used to shut off the gas supply to the cook- assembly is used to pressurize an additional agent tank in a multi-
<br /> ing equipment when the system is actuated. ple tank system.
<br /> Gas Valve Air Cylinder: An air cylinder, located in the release Regulated Release Mechanism: An enclosed device within the
<br /> mechanism,which operates pneumaticalty from pressure released ANSUL AUTOMAN regulated release assembly which releases
<br /> from the N2 cartridge, mechanically unlatchs a mechanical the expellant gas, activates alarms, and/or shuts off other devices
<br /> gas valve actuator, causing the gas valve to close upon system when signaled automatically by a detector or manually with a
<br /> actuation. remote pull station
<br /> Group Appliance Protection: Group protection is overlapping Regulator:A device used to regulate the pressure from the nitro-
<br /> nozzle appliance protection that protects individual hazard zones gen cartridge into the agent tank(s) when the system is actuated.
<br /> located under a common hood.These"groups"of appliances may Remote Manual Pull Station: A device which provides manual
<br /> be separated by appliances not requiring protection, such as actuation of the system from a remote location.
<br /> steam equipment or work tables.
<br /> Series Detector: Any detector located in-line between the regu-
<br /> Hazard Zone:The hazard zone is defined as a theoretical,flat and lated release assembly and the terminal detector
<br /> level, rectangular surface, that includes all of the cooking hazard
<br /> areas of the protected appliances under a common hood.The pur- Sptit System:A split distribution piping system includes a bull tee
<br /> pose of the hazard zone is to provide a means for locating and between the agent tank and the first nozzle
<br /> aiming the appliance protection nozzles.
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