TM Duct Smoke Detector 2 and 4-Wire, Photoelectric Type
The SuperDuct SD Series duct detectors offers the convenience of modular design plus the power of advanced sensing technology. Available in a two wire version or a four wire version with separate controllers able to serve two detectors, installers have the freedom to configure the SuperDuct to suit the tight spaces typical of duct applications - and still have ready access to field connections and maintenance features.
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- -4F to 158F operating range with 100 ft/min to 4,000 ft/min air velocity
- Operating humidity: 10 - 93% relative humidity non-condensing
- 0.67 to 2.46% obscuration/ft
- 24V DC, 24V AC, 120V AC, 220/240V AC
- Standby current: 77.9 mA @ 24V DC
- Alarm current: 124.3 mA @ 24V DC
SuperDuct smoke detection is ideally suited to HVAC applications where early indication of combustion is required within the confined space of ventilation ductwork. Duct detectors are usually installed on the supply duct after the air filters, or in the return air stream prior to being diluted by outside air. To avoid the effects of stratification, install the sensor inlet tube a minimum of six duct widths beyond any bends in the duct.
SuperDuct detectors continually sample air flow in the HVAC duct and initiate an alarm condition whenever smoke is detected. An alarm is activated when the quantity (percent obscuration) of combustion products in that air sample exceeds the detector's sensitivity setting.
Air velocity in the duct as low as 100 ft/min. maintains adequate air flow into the sensor smoke chamber through air-holes in the air sampling tube and discharges through the exhaust tube. SuperDuct 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 mounted in virtually any angle relative to the airflow.
SuperDuct detectors are engineered to operate optimally under the harsh environmental conditions frequently found in HVAC ductwork. Nonetheless, before installing the detector, test the duct air velocity, temperature, and humidity to verify that it is within the operating range of the SuperDuct detector. Consult the SuperDuct installation sheet for details.
With SuperDuct, smoke detection for two airstreams can be monitored with just one set of field connections for fan shut-down, damper control, etc.
Up to two detectors may be connected to a single controller. Typically, the detector comes attached to the controller, connected by means of an integral cable (provided).
Alternatively, one or both detectors may be installed remotely from the controller and connected by means of either a cable with RJ45 connectors, or terminal blocks (see ordering information for details).
Wiring between detector and controller, along with wiring between controller and fire alarm panel (if used) is supervised.
Controllers and detectors come pre-assembled for easy installation for the RJ45 models. They are sold separately for the terminal versions.
RJ45 wiring harnesses
These 8-conductor cables are used to interconnect detectors with controllers. Harnesses are availble in 5 ft., 10 ft., and 15 ft. lengths. They include RJ45 connectors with rubber glands to provide a watertight seal at each end.
Air Sampling Tubes
Rigid metal smapling tubes are available in several lengths. They can be installed without the need to open the detector.
Remote Test/Reset Station
The Remote Test/Reset Station provides alarm test or dirty test capability from a remote location. It includes a one-gang plate, momentary SPST switch, red alarm LED, and terminal block. Magnetically-operated or key-operated models are available.
Air Velocity Test Kit
With this kit, and a suitable manometer, testing can be carried out with the duct detector fully installed and wired.
Used to activate test routine from either a SD-TRM4 Remote Test/Reset Station, or the detector.
- Data Sheet K85001-0583 - Four-Wire SuperDuct Duct Smoke Detector.pdf
- Data Sheet K85001-0585 - Two-Wire SuperDuct Duct Smoke Detector.pdf
- Edwards Signaling Smoke and Heat Detectors Application Bulletin
This is a guide for the installation of smoke and heat detectors.