System Sensor DH100acdc Install and Maint Instructions

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SYSTEM SENSOR Division of Pittway 3825 Ohio Avenue St Charles Illinois 60174 FAX 630 377 6495 AND MAINTENANCE INSTRUCTIONS Air Duct Smoke Detector Installing thoroughly read the System Sensor Guide for Proper of Smoke Detectors in Duct Applications I56 473 which detailed information on detector spacing place zoning wiring and special applications Copies of this are available from System Sensor NFPA Standards 72 90A should also be referenced for detailed information This manual shall be left with the owner user of equipment This detector must be tested and maintained following NFPA 72 requirements The detector be cleaned at least once a year of Contents 1 General Description Limitations of Duct Smoke Detectors Exploded View of Duct Smoke Detector Components 2 Contents of the Duct Smoke Detector Kit Installation Sequence Duct Smoke Detector Maintenance and Test Procedures 5 Detector Cleaning Procedures Board Replacement Specifications General Description HVAC system supplies conditioned air to virtually every of a building Smoke introduced into this air duct sys will be distributed to the entire building Smoke detec designed for use in air duct systems are used to sense presence of smoke in the duct DH100ACDC Air Duct Smoke Detectors are supplied an ionization model or photoelectronic model These smoke detection methods are combined with an effi housing design that samples air passing through a and allows detection of a developing hazardous condi When sufficient smoke is sensed an alarm signal is at the fire control panel monitoring the detector appropriate action can be taken to shut off fans blow change over air handling systems etc These actions facilitate the management of toxic smoke and fire gases the areas served by the duct system detectors are designed to operate on 24 VDC 120 VAC or 240 VAC Alarm and supervisory relay con are available for control panel interface alarm initia HVAC control and other auxiliary functions Auxiliary are also provided for fan shut down or signaling of up 9 other detectors in the loop for multiple fan shut down detectors are not designed for 2 wire applications testing the alarm can be enabled by a magnet acti test switch or by the optional remote test station duct smoke detector latches into alarm state when an occurs A green LED flashes to indicate power a LED signals local alarm indication and optional ac offer a variety of annunciation capabilities DH100ACDC can be reset by a momentary power in the reset button on the front cover the control or remote reset accessory The DH100ACDC incor a cover tamper feature that provides a trouble after 20 minutes if the cover is removed or im installed Proper installation of the cover re the trouble condition Limitations Of Duct Smoke Detectors National Fire Protection Association has established DUCT DETECTORS MUST NOT BE USED AS A SUB FOR OPEN AREA DETECTOR PROTECTION as a 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 the user read NFPA Standards 90A 72 and 101 The Air Duct Smoke Detectors are listed per UL 268A device will not operate without electrical power situations may cause an interruption of power The safeguards should be discussed with your local fire specialist device will not sense smoke unless the ventilation sys is operating and the cover is installed this detector to function properly it MUST be installed to the instructions in this manual Furthermore detector MUST be protected from the elements and op within ALL electrical and environmental specifica listed in this manual Failure to comply with these may prevent the detector from activating smoke is present in the air duct Manuals Online Figure 1 Exploded View Of Duct Smoke Detector Components HOLES STRIP BOARD TUBE SAMPLING TUBE SCREW BOARD TUBE MOUNTING as indicated on the template Insert the two jack nut Drive a 10 machine screw into jacket to flare retainer then back out the screw to use for detector Sampling Tube Installation for Ducts Less 11 2 Feet Wide see Figure 2 Remove the front cover Slide the plastic sampling tube into the housing bushing Align the holes in the bushing with the holes in the tube Make sure there are 6 exposed holes on plastic sampling tube Secure with the 8 self tap screw into the bottom of the permanent tube in Fig 1 For ducts greater than 11 2 feet in width refer to 5.4.1 and 5.4.2 2 Plastic sampling tube to duct smoke detector Contents Of The Duct Smoke Detector Kit Complete housing base and cover assembly Two 10 machine screws for mounting Two sampling tube filters One test magnet Drilling template Two foam gaskets Four 6 self tapping mounting screws for the metal tube and optional exhaust tube extension Two jack nuts One inlet tube end plug One plastic sampling tube One 8 self tapping screw for the plastic sampling tube For ducts over 11 2 feet longer inlet sampling tubes be ordered to complete the installation They be the correct length for the width of the duct they will be installed See Table 1 on page 3 determine the inlet tube required for different widths Installation Sequence Verify Duct Air Flow Direction And Velocity DH100ACDC detectors are designed to be used in air systems having air velocities of 500 to 4000 feet minute Be sure to check engineering specifications to that the air velocity in the duct falls within these pa If necessary use a velocity meter to check the air in the duct Drill The Mounting Holes the paper backing from the mounting template Affix the template to the duct at the desired location Make sure the template lies flat and on the duct Center punch holes A and B Drill the Manuals Online Secure The Detector Housing To The Duct the foam gaskets over the tube bushings as shown in 3 Use the two machine screws to screw the detector to the duct Do not overtighten the screws 3 Installation of foam gaskets over sampling bushings HOLES FOR HOUSING DUCT WORK self tapping screws as shown in Figure 4 Sampling tubes over 3 ft long be supported at the end opposite the duct smoke de Slide the tube into the housing bushing that meets the flow first Position the tube so that the arrows point the air flow Secure the tube flange to the housing bushing with two For tubes longer than the width of the air duct the tube extend out of the opposite side of the duct If are more than 2 holes in the section of the tube ex out of the duct select a different length using 1 Otherwise trim the end of the tube protruding the duct so that 1 to 2 of the tube extend out the duct Plug this end with the end plug and tape any holes in the protruding section of the tube Be to seal the duct where the tube protrudes 4 Air duct detector inlet sampling tube HOLES FACE AIR FLOW FLOW DIRECTION 5 Tube mounting configurations with varying flow direction INDICATE POSITION OF TUBE HOLES FLOW FLOW MOUNTING OF HOUSING FLOW FLOW Sampling Tube Installation for Ducts Greater 11 2 Feet Wide sampling tube is identified by a series of air inlet holes the tube A plastic tube is included for ducts up to 18 in All other lengths must be purchased separately Or the correct length as specified in Table 1 for width of duct where it will be installed The exhaust tube is onto the base of the duct housing a

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