8843 and 8854 Photoelectric Smoke Detectors - Siemens Building ...

The 8854 utilizes the low-profile 8853 surfacemounting base which may be used with a 4 inchsquare or octagonal box, as well as a single-gangelectrical box. The 8854 has screw clamp terminalsfor easy wiring. The base has an optional concealedlocking device to prevent unauthorizeddetector removal.The 8854 is capable of operating both a remotelamp and a relay or audible base when used withLifeWatch-450 control panel, other panels will allowone accessory per detector. The 8848 Remote Sensitivityand Alarm indicator duplicates the multicolorLED of the detector at a remote location to indicatenormal operation (green), trouble or out of sensitivity(amber), or alarm (red) for detectors located in out ofthe way places such as duct detectors, under computerroom floors, or above suspended ceilings. The8849 is simply a remote red LED to indicate an alarmcondition of a detector.The 8843 and 8854 and all of the above listedaccessories are UL and ULC listed, and approvedby CSFM and NYMEA, and other local boardswhere applicable.Application DataThe 8843 and 8854 is fully compatible with otherFaraday low voltage detectors and may be intermixedon the same conventional zone circuit. The8843 and 8854 are applicable to the 30 foot spacing(900 sq. ft.) as referred to in the National FireProtection Association Standard 72. This detectorspacing, however, is based on ideal conditions andshould be used only as a guide in planning detectorlayout. Do not mount detectors close to ventilationor air conditioning outlets that may movesmoke away from the detector. Exposed joists orceiling beams may also effect safe positioning ofsmoke detectors. It is mandatory that engineeringjudgement be applied regarding detector placementand spacing.Detector CleaningThe detector is field cleanable by twisting thedetector out of the base, unsnapping the chamberfrom the outer cover, without affecting sensitivecalibration and cleaning or replacing the removablechamber labyrinth and bug screen.Architect and Engineer SpecificationsThe photoelectric smoke detector shall be a plug-inunit which mounts to a twist/in base and shall beUL listed.The smoke detector shall operate on a two-wirecircuit and shall contain a multicolor LED indicatorindicating the detector is operational by flashinggreen, trouble by flashing amber, and alarm byflashing red. The detector shall be continually selftesting with visual operation indication and notrequire additional hardware or contact with thedetector for testing purposes.The detector shall allow for easy cleaning orreplacement of screens and/or chamber componentswithout affecting calibration.The base assembly into which the detector isinstalled shall be a twist/in design with screwclamp terminals. A security lock shall be installedin those areas where tamper resistant installation isrequired as indicated in the drawings.The detector or group of detectors shall require atwo-wire circuit of #18 AWG thermoplastic fixturewire enclosed in conduit, or #18 AWG limitedenergy shielded cable without conduit, if permittedby local building codes. All wiring shall be approvedfor fire alarm use and in compliance withnational and local codes. When required, the smokedetector shall contain a 135°F fixed temperatureself restoring heat sensor. Actuation of this deviceshall lock the detector alarm circuit.The detector shall be Faraday Model 8854 or Model8843 with a 8853 surface mounting base.