System Sensor Innovair DH100 Air Duct Smoke Detector

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INSTALLATION AND MAINTENANCE INSTRUCTIONS Air Duct Smoke Detector Installing thoroughly read the System Sensor Guide for Proper of Smoke Detectors in Duct Applications I56 473 provides detailed information on detector spacing zoning wiring and special applications Cop of this manual are available from System Sensor NFPA 72 and 90A should also be referenced for de information This manual should be left with the owner user this 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 DH100 Air Duct Smoke Detectors are supplied as a model This smoke detection method is with an efficient housing design that samples air through a duct and allows detection of a develop hazardous condition When sufficient smoke is sensed alarm signal is initiated at the fire control panel monitor the detector and appropriate action can be taken to off fans blowers change over air handling systems These actions can facilitate the management of toxic and fire gases throughout the areas served by the system Division of Pittway 3825 Ohio Avenue St Charles Illinois 60174 FAX 630 377 6495 detectors are designed to operate with 12 or 24 UL listed compatible 2 wire control panels Alarm must be limited to 100mA or less by the control Auxiliary relay contacts for control purposes are available for use with the DH100 Control must ini from the control panel 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 alarm occurs A green LED flashes to indicate power red LED signals local alarm indication and optional offer a variety of annunciation capabilities DH100 can be reset by a momentary power interrup the reset button on the front cover the control panel remote reset accessory 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 recom that the user read NFPA Standards 90A 72 and 101 DH100 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 Figure 1 Exploded View Of Duct Detector Components TUBE TUBE SELF TAPPING SCREW HOLES STRIP BOARD BOARD TUBE MOUNTING 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 Metal sampling tube end plug One telescoping sampling tube One 8 self tapping screw for the telescoping 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 DH100 detectors are designed to be used in air han systems having air velocities of 500 to 4000 feet per Be sure to check engineering specifications to en 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 Holes Installation Chart 14 16 18 as indicated on the template Insert the two jack nut Drive a 10 machine screw into the jacknut to the retainer and then back the screw out to use for de mounting Sampling Tube Installation for Ducts Less 11 2 Feet Wide see Figure 2 Remove the front cover Use the tube installation chart above to determine the screw setting Slide the sampling tube into the housing bushing Align the holes in the bushing with the holes in the sam tube Make sure the number of holes exposed on supplemental tube matches the number as deter in step 2 Secure with the 8 self tapping screw the bottom hole of the permanent tube For ducts greater than 11 2 feet in width refer to 5.4.1 and 5.4.2 2 Sampling tubes connected to duct smoke 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 Sampling Tube Installation of Ducts Greater 11 2 Feet Wide sampling tube is identified by a series of air inlet holes the tube One telescoping tube is included for ducts up 18 in width All other lengths must be purchased sepa Order the correct length as specified in Table 1 for of the duct where it will be installed The exhaust is molded onto the base of the duct housing and the Exhaust Tube Extension is available as an acces in those cases where the molded exhaust port does not at least 2 inches into the duct inlet tube is always installed with the air inlet holes into the air flow To assist proper installation the mounting flange is marked with arrows Make sure inlet tube is mounted so that the arrows point into the flow see Figure 4 Figure 5 shows the various combi of tube mounting configurations with respect to air Mounting the detector housing in a vertical orienta is acceptable provided that the air flows directly into sampling tube holes as indicated in Figure 4 1 Inlet tubes required for different duct Duct Width Tube Required to 2 ft to 4 ft to 8 ft to 12 ft Installation For Ducts Greater Than 1 1 2 Feet Less Than 8 Feet Wide If the tube is longer than the width of the air duct drill a hole in the duct opposite the hole already cut for inlet tube Make sure the hole is 1 to 2 below the in hole on the opposite side of the duct to allow for mois drainage If the tube is shorter than the width of the air install the end plug into the inlet tube as shown in 4 Sampling tubes over 3 ft long must be supported the end opposite the duct detector 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 self tapping screws For tubes longer than the width of the air duct the tube extend out of the

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