14-14834 - Laserfiche WebLink

Browse Search

Product Overview— (continued) Profile overview Each detector consists of a dust-resistant photoelectric Model FDOT421 provides two(2)different alarm sources chamber;a solid state,non-mechanical thermal sensor,and that can be selected individually(ON or OF�by the control microprocessor-based electronics with a low-profile plastic panel. housing. Every Model FDOT421 fire detector is shipped with Alarm Source 1 (Neural Network)—Combines smoke—heat a protective dust cover: with the following selectable profiles: • Sensitive •Standard • Robust 1 Sensitive: This parameter set is practically suitable for areas where few misleading sources of false alarm are present,and is appropriate where priority is given to � detecting open fires as soon as possible(e.g.—typical ly a Z clean application with controlled environmental ��r�oa�Fnar+��a�c� conditions.) z)nuse aoo�er ��> Robust:This parameter set offers improved resistance to false alarms in areas where misleading sources, Operation such as cigarette smoke or exhaust fumes, may cause Model FDOT421 utilizes an infrared lightemitting diode a nuisance alarm. (IRLED),and infrared light-sensing photodiode. Under Standard•This parameter set is practically apt for normal conditions,lighttransmitted bythe LED is directed normal office, hotel lobby type applications and is the away from the photodiode and scattered through the smoke default setti ng. chamber in a controlled pattern. The smoke chamber is designed to manage light dissipation Alarm source 2(Thermistor)—Heat only,provides the and extraneous reflections from dust particles or other non- following: •Static 1 fixed at 135°F(57°C),default setting smoke,airborne contaminants in such a way as to maintain . Rate-of-Rise Detection: 15°F I min. (8.3°C 1 min) stable,consistent detector operation. When smoke enters the detector chamber,light emitted from the IRLED is If the detector is not programmed,Model FDOT421 will scattered by the smoke particles,and is received by the default to a'standard'profile setting,which allows operation photodiode. for a normal office-type environment. Model FDOT421 also utilizes a modern,accurate and shock- Model FDOT421 contains a tri-color LED indicator,capable of resistant thermistor to sense temperature changes. flashing any one(1)of three(3)distinct colors: Green, 'r'� ��:�.,or Red. During each flash interval,the The signal processing with detection algorithms allows the microprocessor-based detector monitors the following: detector to first gather smoke and thermat data,and then .Smoke in its sensing chamber analyze this information in the detector's'neural network.' . Smoke sensitivity is within the range indicated By comparing data received with the common on the nameplate label characteristics of fires orfire signatures,Model FDOT421 can . Internal sensors and electronics compare these signals to those of deceptive phenomena that cause other detectors to false alarm. Based on the results of the monitoring,the LED indicator flashes the following: 3 ��85�1 Flash Car�iti�c� t� 1 N��` �O�Of 5�L1f�i i , ��%xs��, ; Normal supervisory operation. p � ' � Smoke sensitivity is within 7 0 � ��,,,� � .,�,`��.�,�wa rated limits. Detector is in trouble and Yellow: needs replacement. 4 � �''�'""�' � ��"� Alarm condition. 1 2 OgGnl LrartamieEer � �"�'iO�"'�` No Flash: Detector is not powered. -- Each Model FDOT421 detector provides three(3)pre- *LED can be turned OFF. programmed parameter sets that can be selected by the fire Please follow the corresponding description of the panel used. alarm control panel. SIEMENS Industry, Inc. Building Technologies Division