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<br />ANSUL@ <br /> <br /> <br />~. <br /> <br />.-_. <br /> <br />G <br /> <br />Detection and Control Components <br /> <br />2151 Photoelectric Smoke Detector <br /> <br />Features <br /> <br />. Unique optical sensing chamber <br /> <br />. Built-in signal processing <br /> <br />. 3.0% nominal sensitivity <br /> <br />. Removable cover for field cleaning <br /> <br />. Visible LED "blinks" in standby <br /> <br />, Sealed against dirt, insects, and back pressure <br /> <br />. Field metering of detector sensitivity <br /> <br />. Built-in magnetic test switch <br /> <br />, Low standby current <br /> <br />, Built-in tamper-resistant feature <br /> <br />. Designed for direct surface or electrical box mounting <br /> <br />. 3600 Field viewing angle of the visual alarm LEOs <br /> <br />. Insect-resistant screening <br /> <br />. Easy plug-in of the head to base <br /> <br />. SEMS screws for easy wiring <br /> <br />, Air velocity up to 3000 feet per minute (914 meters per <br />minute) <br /> <br />Applications <br /> <br />Photoelectric detectors are recommended in areas where <br />slow smoldering fires are likely to ignite. In areas where <br />small combustion particles are usually present from fork-lift <br />trucks, cooking stoves, etc., they are less likely than ioniza- <br />tion detectors to produce false alarms. The detectors are <br />used in combination with an ANSUL AUTOPULSE@ Control <br />System and an ANSUL fire suppression system for automat- <br />ic detection, alarm, equipment control, and fire suppression <br />system release capabilities. <br /> <br />Description <br /> <br />The 2151 photoelectric smoke detector contains a unique <br />optical sensing chamber designed to sense the presence of <br />smoke particles produced by a wide range of combustion <br />sources and meet the performance criteria designed by UL <br />268. An integrated circuit incorporates signal processing to <br />reduce false alarms and sample/hold circuitry to provide <br />easy field metering of sensitivity. <br /> <br />The 2151 photoelectric detector incorporates the light scatter <br />principle within its sensing chamber and solid-state circuitry <br />allowing it to react to either smoldering or flaming fires. <br /> <br />The high-impedance circuitry of the detector allows a single <br />loop to power multiple detectors with very low power con- <br />sumption. Two externally-mounted LED indicators are pro- <br />vided which will blink as long as the detector is powered and <br />will light steadily when the detector is in alarm. <br /> <br />Technical Information <br />Stand-by Current: . . . . . . . . . . . . . . . . . . . . . . . 85 microamps <br />Sensitivity: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0% nominal <br />Weight:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 lb. (277 g) <br />Size: . . . . . . . . . . . . . . . . . . . . . 1.7 in. High x 4.0 in. diameter <br />(84 mm x 102 mm) <br />Construction:. . . . . . . . . Flame retardant white thermo plastic <br />Temperature: .... . ........32 OF to 120 OF (0 oC to 49 0c) <br />Humidity Range: .. .. .. .... . 10-93% RH (non-condensing) <br />Maximum Air Velocity: . . . . . . . . . . . . . . 3000 feet per minute <br />(15 meters per second) <br /> <br />2151 PHOTOELECTRIC SMOKE DETECTOR WITH BASE <br /> <br />............. <br /> <br />~ <br />, <br /> <br />1\'\1 <br />. <br /> <br />o <br /> <br />I((] <br />. <br /> <br /> <br />007363 <br /> <br />B110LP OPTIONAL NFPA CLASS "A" WIRING <br />H <br /> <br /> <br /> <br />(+) <br />(+) <br /> <br />007360 <br /> <br />2-1-06 <br />3-21.1 <br />