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1. Labyrinth 1 <br /> �i <br /> 2. Optical <br /> transmitter <br /> 3. Optical <br /> OR <br /> receiver 0 1. Dust cover <br /> o <br /> 2. Photoelectric <br /> smoke <br /> - detector <br /> � • 2 <br /> Application Parameter Sets <br /> Model FD0421 provides four(2) pre-programmed sensitivity parameter sets that can be selected by the Siemens fire-alarm <br /> control panel in order to match the expected application or environmental conditions: <br /> • Standard <br /> • Air-duct <br /> Standard: This application parameter set, which is ideal for normal office I hotel-lobby-type <br /> applications, is the default setting. <br /> Air-Duct: This application parameter set is used when the detector is used a UL268A (DI) <br /> compliant, direct in-air duct application without a duct housing. <br /> Model FD0421 does not require a field sensitivity test. Model FD0421 is UL Listed as a self-testing <br /> device and complies with NFPA 72 as a self-monitoring detector and control-panel arrangement. This <br /> parameter set is also used when Model FD0421 is used in air-duct housings (Models FDBZ492 and <br /> FDBZ492-HR). <br /> A quick visual inspection is sufficient to indicate the condition of Model FD0421 at any time. If more <br /> detailed information is required, a printed report can be provided from the compatible FACP, indicating <br /> the status and settings assigned to each individual detector. When Model FD0421 moves to'Alarm' <br /> mode,the detector will flash RED and continue flashing until the system is reset at the FACP. At that <br /> same time, any user-defined, system-alarm functions programmed into the system are activated. <br /> Model FD0421 contains a tri-color LED indicator, capable of flashing any one (1) of three (3) distinct <br /> colors: GREEN I YELLOW I RED. During each flash interval, the microprocessor-based detector monitors <br /> the following scenarios: <br /> • Smoke sensitivity is within the range indicated on the nameplate label <br /> • Smoke in its sensing chamber <br /> • Internal sensors and electronics are functional <br /> Based on the results of the monitoring, the LED indicator flashes the following: <br /> FLASH COLOR CONDITION FLASH INTERVAL <br /> [in seconds] <br /> GREEN*: Normal supervisory operation. 10 <br /> Smoke sensitivity is within rated limits. <br /> YELLOW: Detector is in trouble and needs replacement. 4 <br /> Alarm'condition 1 <br /> NO FLASH: Detector is not powered. — <br /> * denotes LED can be turned OFF <br /> Please follow the corresponding description of the panel used. <br /> Siemens <br /> Smart Infrastructure- Building Products —2— usa.siemens.comlfire <br />