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Application The sampling tube may be installed from either the duct side of SuperDuct detectors are ideally suited to duct smoke detection the assembly or from inside the sensor compartment,as preferred applications where early indication of combustion is required within by the installer. (The exhaust tube must be installed from the ductside.)Sampling tubes may be rotated in 45-degree increments so the confined space of ventilation ductwork. Its primary purpose that air-holes can be aligned to allow the unit to be mounted at is to provide early warning of an impending fire and to prevent virtually any angle relative to the air flow. smoke from circulating throughout the building. It is typically used to detect smoke in the supply side of the HVAC system but can In installations where the duct smoke detector's controls and indica- provide supervision of the return side as well. tors are hidden from view,a remote test station or an LED indicator ----------------- ---------- can be connected to the detector to provide these functions. Protected premises Remote i Remote Test Stations Alarm relay test I output stalion I t Labor-saving Remote Test/Reset stations provide alarm testing from the convenience of a remote I —' location.Tests can be performed quickly and safely Ddetec or e Ratlrm -without having to climb to the roof. Magnetically- HVAC�r - operated and key-operated one-gang models are unit _ ; -- --- available.Signature SuperDuct detectors are also = i Duct d eclare Supply l compatible with GSA-LED remote alarm LED. air i �- -- -- - i Air velocity in the duct as low as 100 ft/min. maintains adequate j Alarm relay air flow into the sensor smoke chamber through air holes in the air Remote output test sampling tube and discharges through the exhaust tube.Su- FACP station perDuct air sampling tubes must be installed with the inlet holes facing the airstream. Sampling tubes may be rotated in 45-degree increments so that air-holes can be aligned to allow the unit to be SuperDuct detectors continually sample air flow in the HVAC duct mounted in virtually any angle relative to the airflow. and initiate an alarm condition whenever smoke is detected. An SuperDuct sensors are engineered to operate optimally under the alarm is activated when the quantity(percent obscuration)of harsh environmental conditions frequently found in HVAC duc- combustion products in that air sample exceeds the detector's twork. Nonetheless, before installing the detector,test the duct sensitivity setting. air velocity,temperature,and humidity to verify that it is within the operating range of the SuperDuct detector. Consult the SuperDuct Signature Series Intelligence installation sheet for details. Like all Signature detectors,the GSA-SD features electronic ad- dressing and issues a dirty sensor warning when it reaches its Dimensions preset limit.The dirty sensor warning indicates the sensor is op- erating within its specified limits but is in need of servicing.When 8.70 in(22.1 cm) 8.15 in(20.7 cm) the detector's ability to compensate for environmental changes 7.75in(19.7 cm) has reached its limit,the duct smoke detector signals a trouble 3.OBIn(7.B2Cm) (;..60- condition. The GSA-SD also uses differential sensing to prevent gradual environmental changes from triggering unwanted alarms.A rapid change in environmental conditions,such as smoke from a fire, causes the detector to signal an alarm state, but dust and debris accumulated over time does not change alarm sensitivity. Each Signature Series SuperDuct detector contains a microproc- essor that performs comprehensive self-diagnostics and stores the results in nonvolatile memory.Stored results include details 228 in such as hours of operation, last maintenance date, and number (5.78 cm) of alarms and troubles.This information can be retrieved and reviewed when desired. Detector Configuration ; 5.45 in The detector assembly cover provides easy access to the smoke (13.84—) sensor, its wiring connections,sample and exhaust tubes,and the j smoke chamber itself. 0 0 0 0 Air enters the detector's sensing chamber through a sampling tube(ordered separately)that extends into the duct and is directed back into the ventilation system through an exhaust tube(in- I 1.90in eluded).The difference in air pressure between the two tubes pulls i (4.83 cm) the sampled air through the sensing chamber.When a sufficient amount of smoke is detected in the sensing chamber,the detector initiates an alarm. 1.38 in 5.40 in ~(3.51 un) (13.72 cm) �!o n C o Page 2 of 4 C)A t'A S -i E E 7K85001-0584 fr} }f': Lc issue 1