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

8843 and 8854 Photoelectric Smoke DetectorsFeatures• Advanced Field Cleanable Chamber Design• Self Diagnostic• Multi-Color LED for Normal, Trouble or Alarm Indication• Low-Profile Design• Easy Twist-In Base Design• ISO 9001 Certified• UL Listed, no. S6082• Made in U.S.A.IntroductionThe Faraday 8843 and 8854 Photoelectric SmokeDetectors, with its microprocessor controlled selfdiagnosticcircuitry, eliminates cumbersomesensitivity test equipment. It is the most advanceddetector in its class. This detector employs a simpletwist-in base for ease of maintenance and has afield cleanable/replaceable labyrinth and bugscreen. This detector is highly immune to falsealarm caused by deceptive phenomena such asdust or RF. These detectors have a full range ofaccessories available, including remote alarmindicator, remote sensitivity and alarm indicator,relay and audible base adapters, and a baseadapter that allows use in older Faraday 8914Series bases.DescriptionThe 8843/8854 is a two-wire, plug-in type photoelectricsmoke detector which is compatible withFaraday’s FireWatch-200, FireWatch-400, LifeWatch-401 and LifeWatch-450 conventional systems.The 8843/8854 contains an infrared light emittingdiode (LED) and a light sensing photodiode arrangedso that under normal conditions, light fromthe LED does not reach the photodiode. Whensmoke enters the photo chamber, light emittedfrom the IR LED is scattered by the smoke particlesand is received by the photodiode. The electricalsignal produced by the photodiode is compared toa factory set alarm threshold, and if sufficient toindicate an alarm, latches the detector alarm. The8843/ 8854 is reset at the control panel.Model 8854The 8843/8854 has self-testing circuitry which teststhe detector for defective operation or contaminationevery 7-8 seconds. If a problem is detected, themulticolor LED indicator will flash amber until theproblem is corrected. The detector flashes green innormal operation. In the alarm mode, the detectorwill flash red every 2-3 seconds, and latch intoalarm, alerting the control panel to the alarmcondition. This microprocessor-controlled selfdiagnostic system eliminates the need for externaltest meters or other equipment for detector testingand also alerts users to trouble conditions prior toperiodic system checks.The detector is field cleanable by twisting thedetector out of the base, unsnapping the chamberfrom the outer cover and cleaning or replacing theremovable chamber labyrinth and bug screen.A fixed 135°F (57°C) thermal sensor is availablewith the model 8843. When the thermal sensor isutilized, an alarm condition will be initiated whenthe temperature in the proximity or the sensorreaches 135°F. At this point the detector locksinto alarm.9634

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.

Technical SpecificationsCurrent Requirements:Normal -100 uA peakAlarm - 40 mAVoltage Range:16 - 26.6 VdcOperating Temperature:32-102°F (0-39°C)Humidity:93% non-condensingShipping Weight:8843, 8 oz. approx.8854, 8 oz. approx.DimensionsWiringCaution:1. Do not use looped wire under base terminal 5.Break wire run to provide supervision of connection.2.When a remote relay is used to control a criticalsystem function, the relay and it’s associateddetector and optional module(s) must be the onlydevices on the initiating circuit.

Ordering InformationSiemens Building Technologies, Inc.8 Fernwood Road • Florham Park, NJ 07932Tel: (973) 593-2600 • Fax: (973) 593-6670Web: www.faradayfirealarms.com10/05 2M SBT/IGWARNING- The information contained in this document is intended only as a summary andis subject to change without notice. The devices described in this document have specificinstruction sheets which cover various technical, limitation and liability information. Copiesof these instruction sheets and the General Product Warning and Limitations Document,which also contains important information, are provided with the product and are availablefrom the Manufacturer. Information contained in these documents should be consultedbefore specifying or using the product. For further information or assistance concerningparticular problems contact the Manufacturer.October 2005 - Supersedes sheet dated 12/03