System Sensor D4120W Duct Smoke Detector

inSTaLLaTion and mainTenance inSTrucTionS 3825 Ohio Avenue St Charles Illinois 60174 FAX 630 377 6495 to 158 F to 70 C to 158 F to 70 C 4 Type 4 Enclosure Watertight to 95 Relative Humidity Non condensing to 4000 ft min 0.5 to 20.3 m sec 14.38 in L x 5 in W x 2.5 in D 37cm L x 12.7cm W x 6.36cm D 7.75 in L x 9 in W x 2.5 in D 19.7cm L x 22.9cm W x 6.35cm D pounds 1.14 kg duct Smoke detector The D4120W duct detector consists of a Power Board and Sensor component Temperature Temperature Rating Velocity Footprint Dimensions Weight supply voltage capacitance Voltage Time with RTS451 Time by power down Up Time response time Test Requirements Using No Accessories standby current alarm current VDC max VDC min to 0.3 sec sec max sec max sec detector label mA 24 VDC mA 24 VDC VAC 50 60 Hz max VAC min to 0.3 sec sec max sec max sec detector label VAC 50 60 Hz VAC min to 0.3 sec sec max sec max sec detector label mA RMS 24VAC 60Hz mA RMS 24 VAC 60 Hz mA RMS 120 VAC 60 Hz mA RMS 120 VAC 60 Hz RATINGS initiation contacts SPST 30 VDC resistive auxiliary contatcs DPDT 30 VDC resistive 250 VAC resistive HP 240 VAC HP 120 VAC Alarm auxiliary contacts shall not be connected to initiating circuits of control Use the alarm initiation contact for this purpose Contacts SPDT 30 VDC resistive 125 VAC resistive of conTenTS Limitations of Duct Smoke Detectors 1 Exploded View of Duct Smoke Detector Components 2 General Description 2 Contents of Duct Smoke Detector Kit 2 Detector Installation 2 Sampling Tube Installation 3 Measurement Tests 3 Field Wiring Installation Guidelines 4 Unit Configuration 5 Detector Status Indication 6 Interconnection Multiple Fan Shut Down 6 Verification of Operation 6 Detector Cleaning Procedures 7 Sensor replacement 7 Optional Accessories 7 Diagrams 5 7 8 inSTaLLing maintain the watertight properties of this duct smoke detector watertight and fittings must be used Mount the product with the conduit holes downwards if possible Read the System Sensor Guide for Proper Use of Detectors in Duct Applications A05 1004 which provides information detector spacing placement zoning wiring and special applications This is available online at www systemsensor com NFPA Standards 72 and should also be referenced for detailed information CURRENT LOADS AT 24 VDC Max Max Max Max Max Max Any combination of accessories may be used such that the given loads are 110mA or less at the Aux output and 50mA or less the Alarm output Max Max This manual shall be left with the owner user of this equipment This detector must be tested and maintained regularly following 72 requirements The detector should be cleaned at least once a year LimiTaTionS of ducT Smoke deTecTorS National Fire Protection Association has established that DUCT DETEC MUST NOT BE USED AS A SUBSTITUTE FOR OPEN AREA DETECTOR as a means of providing life safety Nor are they a substitute for warning in a building regular fire detection system Sensor supports this position and strongly recommends that the user NFPA Standards 90A 72 and 101 The D4120W Air Duct Smoke Detec are listed per UL 268A device will not operate without electrical power Fire situations may an interruption of power The system safeguards should be discussed your local fire protection specialist device will not sense smoke unless the ventilation system is operating the cover is installed this detector to function properly it MUST be installed according to the in in this manual Furthermore the detector MUST be operated within electrical and environmental specifications listed in this manual Failure comply with these requirements may prevent the detector from activating smoke is present in the air duct figure 1 exPLoded VieW of ducT Smoke deTecTor comPonenTS TUBE BOARD BOARD MODULE COVER MODULE TUBE seperately HEAD TEST LOCATION generaL deScriPTion introduced into an air duct system will be distributed throughout the building Smoke detectors designed for use in air duct systems are used sense the presence of smoke in the duct D4120W Duct Smoke Detectors utilize 4 wire photoelectric technology the detection of smoke This detection method when combined with an housing samples air passing through the duct allowing detection of developing hazardous condition When sufficient smoke is sensed an alarm is initiated and appropriate action can be taken to shut off fans blow change over air handling systems etc These actions can facilitate the of toxic smoke and fire gases throughout the areas served by the system D4120W detectors are designed to operate on 24 VDC VAC or 120 VAC and supervisory relay contacts are available for control panel interface initiation HVAC control and other auxiliary functions Auxiliary re are provided for fan shut down Detector interconnection provides signal of up to 50 other detectors in the loop for multiple fan shut down These are not designed for 2 wire applications deTecTor feaTure SeT 2D51 plug in head sensors to 1 power board capability missing signal tubes install from front or rear of detector with existing accessories conTenTS of The ducT Smoke deTecTor kiT board assembly and cover s Three 10 sheet metal screws for mounting One test magnet Drilling template One sampling tube end cap One plastic exhaust tube A sampling tube must be ordered to complete the installation It must the correct length for the width of the duct where it will be installed Table 1 on page 3 to determine the inlet tube required for different duct deTecTor inSTaLLaTion VerifY air fLoW direcTion and VeLociTY D4120W detectors are designed to be used in air handling systems with velocities of 100 to 4000 feet per minute Duct widths from 6 inches to 12 can be accommodated Be sure to check engineering specifications to that the air velocity in the duct falls within these parameters If neces use a velocity meter anemometer to check the air velocity in the duct deTermine mounTing LocaTion and configuraTion ducts wider than 18 inches it is recommended that the detector be downstream of a bend obstruction in the duct or the supply or air inlet Installation of duct detectors can be on or within a commercial rooftop heating and air conditioning system fire smoke dampers economizers They may be mounted in either the supply and or return air as determined by local code a suitable location is selected determine if the detector is to be mounted a side by side configuration or a top over bottom as shown in Figure 2 If mounting in the square configuration the rear attachme