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SECTION I - GENERAL INFORMATION UL EX. 3470 ULC CEx747 Page 1-2 REV. 3 10-1-02 DEFINITION OF TERMS (Continued) Depth: When referring to depth as a linear dimension, it is the horizontal dimension measured from front to back of the appliance or plenum. Detector: A device which includes the detector bracket, detector linkage, and fusible link used for automatic operation of the fire suppression system. Detector Linkage: A device used to support the fusible link. Distribution Piping: Piping which delivers the extinguishing agent from the tank to each discharge nozzle. See also Supply or Branch lines. Ducts (or Duct System): A continuous passageway for the trans- mission of air and vapors which, in addition to the containment components themselves, may include duel fittings, plenums, anellor other items or air handling equipment. Electrostatic Precipitator: A device used to aid in the cleaning of the exhaust air. This device is normally installed at or near the base of the ventilation duct. Expellant Gas Line: Piping anellor hose which supplies the nitro- gen or carbon dioxide gas from the regulated release assembly! regulated actuator assembly to each agent tank. Flow Number: Term used in system design to describe the flow capacity of each nozzle used to determine the quantity of tanks needed to cover a certain group of hazards. Fusible Links: A form of fixed temperature heat detecting device employed to restrain the operation of a mechanical control until its designed temperature is reached. Gas Valve: A device used to shut off the gas supply to the cook- ing equipment when the system is actuated. Gas Valve Air Cylinder: An air cylinder, located in the release mechanism, which operates pneumatically to mechanically unlatch a mechanical gas valve actuator, causing the gas valve to close upon system actuation. High Proximity: Indicates a distance (vertically) between the noz- zle tip and the surface of the appliance being protected. Hood: A device provided for cooking appliances to direct and cap- ture grease-laden vapors and exhaust gases. It shall be construct- ed in a manner which meets the requirements of NFPA 96. Liquid Agent: A potassium-based solution used for the knock- down and suppression of fire. Low Proximity: Indicates a distance (vertically) between the noz- zle tip and the surface of the appliance being protected. Maximum Length of Cooking Appliance: The maximum dimen- sion, on any side, which may be protected by one nozzle. Maximum Piping: Specified length of piping and number of fit- tings which must not be exceeded for each system. Medium Proximity: Indicates a distance (vertically) between the nozzle tip and the surface of the appliance being protected. Minimum Piping: Minimum length of distribution piping required between the agent tank outlet and any nozzle protecting a griddle, range, or fryer. Nozzle: A device designed to deliver the liquid agent with a spe- cific flow rate and stream pattern. ~ Plenum: The space enclosed by the filters and the portion of the hood above the filters. Pre-engineered System: NFPA 17A defines a pre-engineered system as one which has "...predetermined fta.v rates, nozzle pressures, and quantities of liquid agent." The R-102 system, as prescribed by UL (Underwriter's Laboratories), has specifiC pipe sizes, maximum and minimum pipe lengths and numbers of fit- tings, and number and types of nozzles.. The hazards protected by this system are also specifically limited as to type and size by UL based upon actual fire tests. All limitations on hazards that can be protected and piping and nozzle configurations are contained in the R-102 installation and maintenance manual which is part of the UL listing. Pulley Elbow: A device used to change the direction of the wire rope which runs between: the regulated release mechanism and the detectors, the regulated release mechanism and the mechan- ical gas valve, and/or the regulated release mechanism and the remote manual pull station. Pulley Tee: A device used to change the direction of two wire ropes which run from a regulated release or a regulated actuator to two remote manual pull stations, or from two regulated releases or regulated actuators to a single mechanical gas valve or from one regulated release or regulated actuator to two gas valves. Regulated Actuator Assembly: An assembly which contains the regulator, pneumatic actuator, agent 1ank (ordered separately), and expellant gas hose within a metal enclosure. This assembly is used to pressurize additional agent tanks in a multiple tank sys- tem. Regulated Release Mechanism: An enclosed device within the ANSUL AUTOMAN regulated release assembly which releases the expellant gas, activates alarms, and/or shuts off other devices when signaled automatically by a detector or manually with a remote pull station. Regulator: A device used to regulate the pressure from the nitro- gen cartridge into the agent tank(s) when the system is actuated. Remote Manual Pull Station: A device which provides manual actuation of the system from a remote location. Salamander Broiler: A broiler very similar in design to the upright broiler. A salamander broiler is used for general broiling of meats and fish, toasting, and holdinglwarming foods. Most contain a removable grease drip tray. Supply Line: The agent distribution piping which extends from the agent tank outlet and serves as a manifold for the branch lines. Series Detector: Any detector located in-line between the regu- lated release assembly and the terminal detector. Terminal Detector: The last in a series of detectors, or the only detector used in a single-detector system. This detector is thus named because it is at the point at which the wire rope ends, or "terminates.. There is only one terminal detector per detection system. Transition: An extension of the hood or canopy which allows for the smooth transmission of gases, air. and vapors between the hood opening and the base of the ventilation duct. Vent Plug: A device used to prevent pressure build-up within the agent tank or agent distribution lines due to temperature fluctuations. r. ~' "