jablotron SD-283ST Quick Start Manual

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jablotron SD-283ST Quick Start Manual Manual pdf 1 page image

JABLOTRON ALARMS a.s.Pod Skalkou 4567/33 46601 Jablonec n. NisouCzech Republic www.jablotron.com| ||SD-283ST Wired combined smoke and heat detectorSD-283ST Wired combined smoke and heat detector 1 / 2 MLW55404The SD-283ST is used to detect fire hazards in the interior ofresidential or commercial buildings. The detector is also suitable forinstalling in caravan trailers or mobile homes. The product is notdesigned to be installed in industrial premises.The detector indicates fire hazard using the built-in LED indicatorand acoustic signalling. The detector can also be powered from anexternal 12 V DC source or from the alarm system control paneland it provides ALARM and TMP outputs. When the detector isused with inserted batteries (3x 1.5 V AA), it can continue operatingas a stand-alone detector when the external 12 V power supply isdisconnected.The SD-283ST consists of two independent detectors – an opticalsmoke detector and a heat detector. The optical smoke detectorworks on the principle of scattered light. It is very sensitive to largedust particles which are present in dense smoke. It is less sensitiveto smaller particles generated by the combustion of liquids such asalcohol. That is why the fire detector also contains a built-in heatdetector which has a slower reaction but is much better at detecting firewhich generates only a small amount of smoke.Detector range and locationThe smoke detector must be installed so that any smoke easilydrifts into the detector owing to natural thermal currents, e.g. on theceiling. It is suitable for residential buildings but not suitable for freespaces, outdoor environments or interiors with extremely highceilings (above 5 m) where fire by-products can disperse over alarge area – the smoke would not reach the detector position.The detectors should be installed by a trained technician with avalid manufacturer’s certificate.Detectors should be installed in the building according to theproject documentation. If such documentation is not available, theirposition should comply with the effective standards for fire alarmsignalling systems.The detector must always be placed in the section leading to theexit of the building (escape route), see Fig. 1. If the building has afloor area greater than 150 m 2, installation of an additional detectorin some other suitable place is required, see Fig.2.1. kitchen,2. living room,3. – 6. bedroomsy / basic coverage{{ / recommendedcoverageFig 1Fig 2Fig 3In multi-storey flats and family houses the detector should beinstalled above the stairs. It is recommended to place additionaldetectors in rooms where people sleep. See Fig 3.Installation on level ceilingsPlace the detector in the centre of the room if possible. Thedetector must not be recessed into the ceiling due to thepossible existence of a cool air layer on the ceiling. Neverplace the detector in the corner of the room (always keep atleast 0.5 m distance from the corner - see Fig 4). There is aninsufficient circulation of air in the corners.Installation on sloping ceilingsIf the ceiling is not suitable for mounting on a level surface (e.g. aroom under a roof ridge), the detector can be installed as in Fig. 5.Fig 10,9 mFig 2centre of the room, best locationacceptable locationWalls, partitions, barriers and lattice ceilingsThe SD-283ST detector must not be installed closer than 0.5m from any wall or partition. A narrow room with a width of less than1.2 m requires the detector(s) to be placed at a distance of at least onethird of the room’s width away. In a case when a room is separatedinto sections with furniture, racks or semi partition walls which donot reach the ceiling, the space is considered to be fully separatedif the gap between the top of these and the ceiling does not exceed0.3 m. A free space of at least 0.5 m is required under and around thedetector. Any irregularities of the ceiling (e.g. girders) exceeding 5 % ofthe ceiling height should be considered a wall and the above mentionedlimitations should apply.Ventilation and air circulationThe detectors must not be installed directly by ventilation or airconditioning vents. In the case of air being supplied through aperforated ceiling, each detector must be placed so that noperforation hole occurs within 0.6 m of the detector.Avoid installing the detector in the following locations:x places with poor air circulation (niches, corners, apexes of A-shaped roofs, etc.)x places exposed to dust, cigarette smoke or steamx places with over-intense air circulation (close to ventilators,heat sources, air conditioning outlets, etc.)x in kitchens and other cooking places (because steam, smoke oroily fumes can cause false alarms or reduce detector sensitivity).x beside fluorescent lights or energy-saving light bulbs(electrical interference can cause a false alarm)x in areas with lots of small insectsWarning: Most false alarms are caused by improper detectorlocation.See CEN/TS 54-14 standard for detailed installation guidelines.InstallationWhen installing the detector, abide by the proceduresrecommended in the previous paragraphs.Fig 3: 1 – detector cover opening; 2 – detector cover closing; 3 – opticalstatus signalling; 4 – arrow showing where to insert the detector; 5 – terminal;6 – configuration terminals; 7 – battery holders1. Open the detector cover, by turning it anti-clockwise (1)2. Attach the base to the selected place using screws.

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