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Product Overview — (continued) Sensitivity Settings <br /> Model 87201 DPU operates on AC power or rechargeable Application Parameter Sets <br /> batteries,providing flexibility and convenience in programming Model OP921 provides four(4)pre-programmed sensitivity <br /> and testing equipment from practically any location. parameter sets that can be selected by the FACP to match the <br /> Model OP921 is a plug-in,two-wire and addressable photoelectric expected app{ication or environmental conditions: <br /> smokedetector. ModeIOP921 ist�7Underwriters'Laboratories • sensitive <br /> • Standard <br /> Listed[�UL268A Listed for direct in-air duct usageJ. • Robust <br /> Each detector consists of a dust-resistant photoelectric chamber • Air-duct <br /> and microprocessor-based electronics with a low-profile plastic Sensitive: This application parameter set is practically <br /> housing. EveryModel OP921 firedetectorisshippedwitha suitable for areas where few misleading sources of false <br /> protectivedustcover: alarm are present, and is appropriate where priority is <br /> ,, ;, given to detecting open fires as soon as possible(e.g.— <br /> typically a clean application with controlled <br /> �` <br /> 1 environmental conditions.) <br /> Standard: This application parameter set is practically <br /> apt for normal office, hotel-lobby-type applications, <br /> ,�, �� ,;, and is the default setting. <br /> �� :; z <br /> � Robust: This application parameter set offers <br /> improved resistance to false alarms in areas where <br /> : �� �� misleading sources, such as cigarette smoke or exhaust <br /> "���"� fumes, may cause a nuisance alarm. <br /> `�� "„ <br /> �w.�����, �,; <br /> �. nustcover Air-Duct: This application parameter set is used when <br /> 2. Smokedetector the detector is used a 4UL268A (DI) compliant direct in- <br /> air duct application without a duct housing. <br /> Operation Model OP921 does not require a field sensitivity test. <br /> Model OP921 isawide-spectrum,photoelectricsmokedetector Model OP921 ist>UL Listed as a self-testing device and <br /> incorporating an infrared light-emitting diode(IRLED),and complies with NFPA 72 as a self monitoring detector <br /> infrared light sensing photodiode. Under normal conditions,light and control panel arrangement. This parameter set is <br /> transmittedbytheLEDisdirectedawayfromthephotodiodeand also used when Model OP921 is used in air-duct <br /> scattered through the smoke chamber in a controlled pattern. housings (Models FDBZ492 and FDBZ492-NR). <br /> The visible LED flashes green every 10 seconds to <br /> The smoke chamber is designed to manage light dissipation and i ndicate communication with the FACP, and to notify <br /> extraneous reflections from dust particles or other non-smoke, Model OP921 has passed its self-test. Should Model <br /> airborne contaminants in such a wayasto maintain stable, OP921 sense a fault or failure within its system, the LED <br /> consistentdetectoroperation. Whensmokeentersthedetector Will flash amber, and the detector will transmit the data <br /> chamber,light emitted from the IRLED is scattered by the smoke to the FACP. <br /> partides,and is received bythe photodiode: A quick visual inspection is sufficient to indicate the <br /> U condition of Model OP921 at any time. If more detailed <br /> �''. _ � r � „�. information is required, a printed report can be <br /> ' `� � provided from the compatible FACP, indicating the <br /> �, : status and settings assigned to each individual detector. <br /> ;� When Model OP921 moves to Alarm mode, the detector <br /> � +� � � will flash red and continue flashing until the system is <br /> ,�� ,,�� f::' � reset at the FACP. At that same time, any user-defined, <br /> �: � "` system-alarm functions programmed into the system <br /> ��� "'� are activated. <br /> 1. Labyrinth Model OP921 contains a tri-color LED indicator, capable <br /> 2. Opticaltransmitter of flashing any one (1) of three (3) distinct colors: <br /> 3. opacatreceiver green,yellow,or red. During each flash interval, the <br /> microprocessor-based detector monitors the following: <br /> SIEMENS Industry, Inc. CerberusT^^ PRO <br /> Building Technologies Division <br />