System Sensor DH100 Manual

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 Copies this manual are available from System Sensor NFPA 72 and 90A should also be referenced for detailed 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 General Description 1 Limitations of Duct Smoke Detectors 1 Exploded View of Duct Smoke Detector Components 2 Contents of the Duct Smoke Detector Kit 2 Installation Sequence 2 Duct Smoke Detector Maintenance and Test Procedures 5 Detector Cleaning Procedures 7 Board Replacement 7 Specifications 8 8 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 moni 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 Ohio Avenue St Charles Illinois 60174 FAX 630 377 6495 detectors are designed to operate with 12 or 24 VDC listed compatible 2 wire control panels Alarm current be limited to 130mA or less by the control panel relay contacts for control purposes are not avail for use with the DH100 Control must initiate from the panel testing the alarm can be enabled by a magnet activat test switch or by the optional remote test station The smoke detector latches into alarm state when an alarm A green LED flashes to indicate power a red LED local alarm indication and optional accessories 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 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 within ALL electrical and environmental specifi 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 HOLES STRIP BOARD TUBE SAMPLING TUBE SELF TAPPING SCREW BOARD TUBE Contents Of The Duct Smoke Detector Kit Complete housing base and cover assembly Two 10 x 11 4 sheet metal 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 One inlet tube end plug Metal sampling tube end plug One plastic sampling tube One 8 self tapping screw for the plastic sampling tube For ducts over 11 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 that the air velocity in the duct falls within these If necessary use a velocity meter to check the velocity 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 as indicated on the template MOUNTING Sampling Tube Installation for Ducts Less 11 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 sam tube Make sure there are six exposed holes on the sampling tube Secure with the 8 self tapping into the bottom hole of the permanent tube For ducts greater than 11 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 11 4 long sheet metal screws to the detector housing to the duct Do not overtighten the screws 3 Installation of foam gaskets over sampling bushings HOLES FOR HOUSING DUCT WORK self tapping screws hole on the opposite side of the duct to allow for drainage If the tube is shorter than the width of air duct install the end plug into the inlet tube as in Figure 4 Sampling tubes over 3 ft long must be at 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 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 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 when the tube protrudes 4 Air duct detector inlet sampling HOLES FLOW FLOW FACE AIR FLOW FLOW DIRECTION 5 Tube mounting configurations with varying flow direction INDICATE POSITION OF TUBE HOLES FLOW FLOW MOUNTING OF HOUSING MOUNTING OF HOUSING Only metal sampling tubes may be used on ori C and D Sampling Tube Installation of Ducts Greater 11 Feet Wide sampling tube is identified by a series of air inlet holes the tube One plastic tube is included for ducts up to 18 width All other lengths must be purchased separately the correct length as specified in Table 1 for width the duct where it will be installed The exha