SuperDuct Four-Wire Duct Smoke Detector - UTCFS Global Security ...

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Control or indicatorReset switchAlarm LEDTrouble LEDPower LEDDescriptionSensor controls and indicatorsMagnetictest/resetswitchResets the sensor when it is in thealarm or trouble state. Activates ortests the sensor when it is in thenormal state.Indicates one or both sensors are inthe alarm stateIndicates one or both sensors are inthe trouble state (flashing = dirty fault,steady = internal or wiring fault)Indicates the controller is energizedAlarmTroubleFigure 5: Sensor controls and indicatorsPowerDirtyThe controls and indicators on the four-wire smoke sensor (seeFigure 5) are described in the table below.Control or indicatorMagnetic test/resetswitchAlarm LEDTrouble LEDDirty LEDPower LEDNormal stateDescriptionResets the sensor when it is in thealarm or trouble state. Activates ortests the sensor when it is in thenormal state.Indicates the sensor is in the alarmstateIndicates the sensor is in the troublestateIndicates the amount of environmentalcompensation used by the sensor(flashing continuously = 100%)Indicates the sensor is energizedThe SuperDuct duct smoke detector operates in the normalstate in the absence of any trouble conditions and when itssensing chamber is free of smoke. In the normal state, thePower LED on both the sensor and the controller are on andall other LEDs are off.Alarm stateThe SuperDuct duct smoke detector enters the alarm statewhen the amount of smoke in the sensor’s sensing chamberexceeds the alarm threshold value. Upon entering the alarmstate:• The sensor’s Alarm LED and the controller’s Alarm LEDturn on• The contacts on the controller’s two auxiliary relayschange over• The controller’s alarm initiation relay closes• The controller’s remote alarm LED output is activated(turned on)• The controller’s high impedance multiple fan shutdowncontrol line is pulled to groundTrouble stateThe SuperDuct duct smoke detector enters the trouble stateunder the following conditions:• A sensor’s cover is removed and 20 minutes pass before itis properly secured• A sensor’s environmental compensation limit is reached(100% dirty)• A wiring fault between a sensor and the controller isdetected• An internal sensor fault is detectedUpon entering the trouble state:• The contacts on the controller’s supervisory relay changeover• If a sensor trouble, the sensor’s Trouble LED and thecontroller’s Trouble LED turn on• If 100% dirty, the sensor’s Dirty LED turns on and thecontroller’s Trouble LED flashes continuously• If a wiring fault between a sensor and the controller, thecontroller’s Trouble LED turns on but not the sensor’sNote: All troubles are latched by the duct smoke detector. Youmust clear the trouble condition then reset the duct smokedetector in order to restore it to the normal state.Multiple duct detector operationThe interconnect feature of the SuperDuct duct smoke detectorlets you connect up to 15 SuperDuct duct smoke detectors toeach other, typically for multiple fan shutdown applications.Technical Bulletin6 SuperDuct Four-Wire Duct Smoke Detector
When one of the duct smoke detectors goes into alarm, itoperates as previously described. On the remaining ductsmoke detectors not in alarm, only the following occurs:• The auxiliary relay contacts change over• The remote LED output is activated (turned on)Duct detector installationInstallation guidelinesTo ensure correct operation, install the SuperDuct duct smokedetector using the following guidelines:• Locate the sensor so its sampling tube is positioned in astraight length of square duct between six and ten ductwidths from any bends or obstructions as shown in thediagram below. See Figure 12 for sensor and controllerdimensions.AirflowBend or otherobstruction6 to 10 duct widths 1 ductwidth• For detection of smoke in the supply air system, install aduct smoke detector in the supply air duct at a pointdownstream from the supply fan and air filters• For detection of smoke in the return air system, install aduct smoke detector in the return air duct at a point beforethe return air stream is diluted by outside air• Extend sampling tubes at least two-thirds across the widthof the HVAC duct with the air inlet holes pointed into thedirection of airflow• Support sampling tubes longer than 3 feet at the endfarthest from the sensor to avoid excessive vibration• Upon installation perform an air pressure differential testto ensure the sensor is capable of sampling the air streamWiring guidelines• Do not loop wiring under screw terminals. Always breakwire runs to ensure proper connection supervision.• Run all field wiring to the controller through theknockouts located at the bottom of the controller housing.Maintain a 1/4-inch separation between power-limitedand nonpower-limited wiring at all times.Installation sequenceThe steps required to install the SuperDuct duct smokedetector are described below. The order in which these stepsare performed may vary depending installation requirements.1. Verify the duct airflow direction and velocity.2. Drill the mounting holes.3. Assemble the detector.4. Mount the detector on the HVAC duct.5. Verify the detector pressure differential.You can install the SuperDuct duct smoke detector in anyposition on a flat surface, as a single unit or with the sensorand controller separated.Changing sensor dirty test operationBy default, sensor dirty test results are indicated as follows:• The sensor’s Dirty LED flashes• The controller’s Trouble LED flashes• The controller’s supervision relay contacts toggleYou can change the operation of a sensor’s dirty test so thatthe controller’s supervision relay is not used to indicate testresults. When two detectors are connected to a controller,sensor dirty test operation on both sensors must be configuredto operate in the same manner.Caution: Changing the sensor dirty test operation will put theduct detector into the alarm state and activate all automaticalarm responses. Before changing sensor dirty test operation,disconnect all auxiliary equipment from the controller andnotify the proper authorities if connected to a fire alarmsystem.To configure dirty test operation:1. Hold the test magnet where indicated on the side of thesensor housing until the sensor’s Alarm LED turns on andits Dirty LED flashes twice (approximately 60 seconds).2. Reset the sensor by removing the test magnet thenholding it against the sensor housing again until thesensor’s Alarm LED turns off (approximately 2 seconds).Use the above procedure to change sensor dirty test back to itsdefault operation.Attaching a controller to a sensor in the fieldIf there are space constraints, you can attach the controller tothe sensor as shown in Figure 6 then mount them at the sametime.Technical BulletinSuperDuct Four-Wire Duct Smoke Detector 7
Page 1 and 2: SuperDuct Four-Wire Duct SmokeDetec
Page 3 and 4: duct and is directed back into the
Page 5: Sensitivity: 0.67 to 2.46 %obscurat
Page 9 and 10: No. Name No. NameNote: High voltage
Page 11 and 12: TroubleshootingController’s Troub
Page 13 and 14: 1.3755.40014.5113.9513.552.721.9005
Page 15 and 16: 1st sensorCategory 5TB1cable [8]TB4

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