15 I n p u t D e v i c e s Overview The SuperDuct two-wir e duct smoke detector is ideally suited to applications wher e early indication of combustion is r equir ed within the confned space of ventilation ductwork. Its primary purpose is to pr ovide early war ning of an impending fr e and to pr event smoke fr om cir culating thr oughout the building. The SD-2W featur es a unique design that speeds installation and simplifes maintenance. Removable dust flters, conformally coated cir cuit boar ds, and optional water -r esistant gaskets keep contaminants away fr om components, ensuring years of tr ouble-fr ee service. When cleaning is r equir ed, the assemblies come apart easily and snap back together in seconds. SuperDuct detectors use dif fer ential sensing to pr event gradual envir onmental changes fr om triggering false alarms. A rapid change in envir onmental conditions, such as smoke fr om a fr e, causes the detector to automatically signal an alarm condition but dust and debris accumulated over time does not change alarm sensitivity . Remote T est, Reset, and Alarm Stations Remote T est/Reset stations pr ovide alarm testing and indication fr om the convenience of a r emote location. T ests can be performed quickly and safely – without having to climb to the r oof. Magnetically operated and key-operated one-gang models ar e available. Specifcations W ir e Size 14-22 A WG Air V elocity 100-4000 ft/min Sensitivity .79 – 2.46 % smoke obs per foot LEDs Power (gr een), Alarm (r ed), T r ouble (amber) & Dirty (amber) Alarm r elay 1 form C, 2.0 A @ 30Vdc Operating Envir onment ULC listed to –29°C to 49°C (–20°F to 120°F), 93% humidity Standar d Featur es • PCB mounted photoelectric detector with onboar d intelligence • Envir onmental compensation with dif fer ential sensing for r eliable, stable, and drift-fr ee sensitivity • -29°C to 49°C operating range with 100 to 4,000 ft/min. air velocity rating assur es r eliability under harsh envir onmental conditions • Wide 0.79% to 2.46% obscuration/ft. smoke sensitivity • Less than 2” deep for easy installation wher e space is tight • Status LEDs r emain visible thr ough clear assembly cover • Cover monitor switch for added security • Sampling tube can be installed with or without the cover in place and can be r otated in 45-degr ee incr ements to ensur e pr oper alignment with duct airfow • Magnet-activated test switch • One Form C auxiliary alarm r elay for contr olling ancillary equipment (e.g. HV AC contr ols) • Easy access to feld connection terminals Or dering Information Catalog Number Description SD-2W Conventional SuperDuct Detector SD-T* Sampling tube, one r equir ed per detector * Specify length in inches example SD-T36 = 36” tube. A vailable tubes sizes: 8, 18, 24, 36, 42, 60, 78 & 120. Accessories SD-TRM Remote test station, magnetic—single gang SD-TRK Remote test station, keyed—single gang EC-LED Remote LED indicator—single gang SD-MAG T est magnet kit SD-GSK Cover gasket kit T wo-wir e Photoelectric Duct Smoke Detector S u p e r D u c t S e r i e s S D - 2 W