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DA-44061 . F-525 2400 Series 2-Wire Photoelectric Smoke Detector with Optional Horn and Thermal Section: Conventional Initiating Devices GENERAL The System Sensor 2400 Series photoelectric detectors are specifically designed to meet the stringent performance re- quirements of industrial and municipal fire detection/alarm sys- tems. The design of these detectors emphasizes ease of in- stallation and field maintenance. The new AT/AIT models add built-in audible signaling and optional isolation of the thermal. FEATURES Unique optical sensing chamber: Superior signal-to-noise ratio. - Built-in signal processing. - 3.0% nominal sensitivity. . Removable cover for field cleaning. . Visible LED "blinks" in standby. . Sealed against dirt, insects, and back pressure. . Built-in 13soF (S7"C) thermal (models TH, AT, and AIT only). . Three-year limited warranty. . Field metering of detector sensitivity (using MOD400R). . Built-in test capability. . Low standby current. . Twist-on mounting bracket with tamper option. Designed for direct surface or electrical box mounting. . Built-in 85 dBA piezoelectric horn (models AT and AIT only). . Insect-resistant screening (0.020"/0.508 mm openings). . Isolated or integrated operation of thermal availabl~. . SEMS screws for easy wiring. APPLICATIONS Use to contribute to life safety, fire protection, and property conservation. Photoelectric detectors are recommended in ar- eas where slow smoldering fires are likely to ignite. In areas where small combustion particles are usually present from forklift trucks, cooking stoves, etc., they are less likely than ionization detectors to produce false alarms. CONSTRUCTION AND OPERATION All System Sensor 2400 Series photoelectric smoke detectors contain a unique optical sensing chamber designed to sense the presence of smoke particles produced by a wide range of combustion sources and meet performance criteria designated by UL 268. A new custom integrated circuit incorporates signal processing to reduce false alarms and sample/hold circuitry to provide easy field metering of sensitivity. Additional key fea- tures of AT/AIT models include available isolation of the ther- mal for separate monitoring, and a built-in horn. The built-in piezoelectric horn produces an interrupted 85 dBA tone. The horn operates when the unit senses smoke, or when the thermal reaches its alarm point (integral thermal models only). July 27, 2000 @@ LISTED CS308 (2400A & S911 2400THA only) I California ~ State Fire :~ Marshal .....,:. 7272-1209:103 (2400 & 2400TH) 7272-1209:134 (2400A T & 2400AIT) <8> Approved MEA 427-91-E Vol. III INSTALLATION Model 2400 detectors are designed for systems use with UL listed control panels. See panel Compatibility Chart to deter- mine maximum number of detectors per zone. Easy to install and maintain, this detector is designed for direct surface mount- ing (mounting bracket included), or mounting to a 4" (101.6 mm) octagon or smaller box. Easy-to-wire screw terminals allow fast and simple field wiring of in, out and remote annunciator con- nections. Consult control panel specifications for the maximum allowable loop resistance for the particular control panel to be used. To prevent wiring mistakes, observe polarities and make cer- tain that each conductor is identified. A copy of Installation and Maintenance Instructions is packaged with each detector. For further information, refer to NFPA 72 and to Local Authority Having Jurisdiction. This document is not intended to be used for installation purposes. We try to keep our product information up-to-date and accurate. We cannot cover all specific applications or anticipate all requirements. All specifications are subject to change without notice. For more information, contact: ." .c, . . . One Town Center Road, Boca Raton, FL 33431 , ~ '..J. Security Services, Inc. Phone: (561) 988-3600 FAX: (561) 988-3675 DA-44061 . 07/27/00 - Page 1 of 2