System Sensor DNRW Manual

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I AND MAINTENANCE INSTRUCTIONS Smoke Detector Temperature Temperature Rating Velocity Footprint Dimensions Footprint Dimensions See applicable detector head installation manual for electrical specifications To determine applicable sensor head use the Base Sensor Cross Reference at www systemsensor com available on the Tools menu to 158 F to 70 C F to 120 F 0 C to 49 C with module installed in the DNRW to 158 F to 70 C 4 Type 4 Enclosure Watertight to 93 Relative Humidity Non condensing to 4000 ft min 0.5 to 20.3 m sec in L x 5 in W x 2.5 in D 37 cm L x 12.7 cm W x 6.36 cm D in L x 9 in W x 2.5 in D 19.7 cm L x 22.9 cm W x 6.35 cm D pounds 0.73 kg Ohio Avenue St Charles Illinois 60174 FAX 630 377 6495 OF CONTENTS Limitations of Duct Smoke Detectors 1 General Description 1 Contents Of The Duct Smoke Detector Kit 1 Sampling Tube Installation 2 Measurement Tests 3 Field Wiring Installation Guidelines 4 Verification of Operation 4 Cleaning 5 Sensor Replacement 5 Optional Accessories 5 Limited Warranty 6 INSTALLING System Sensor Applications Guide for Duct Smoke Detectors HVAG53 provides detailed information on detector spacing placement wiring and special applications This manual is available online at NFPA Standards 72 and 90A should also be refer for detailed information This manual shall be left with the owner user of this equipment The detector must be tested and maintained regularly following 72 requirements According to NFPA the detector should be visually semiannually and functionally tested at least once a year This may to be more frequent depending on the air quality of the duct supply air 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 DNRW Air Duct Smoke Detectors 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 this manual Furthermore the detector MUST be operated within electrical and environmental specifications listed in this manual and the head installation manual Failure to comply with these requirements prevent the detector from activating when smoke is present in the air duct CURRENT LOADS AT 24 VDC Max Max Max GENERAL DESCRIPTION introduced into this 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 DNRW Air Duct Smoke Detector uses photoelectric technology for the of smoke This detection method when combined with an efficient design samples air passing through the duct and allows detection of developing hazardous condition When sufficient smoke is sensed an alarm is initiated at the fire control panel monitoring the detector and appro action can be taken to shut off fans blowers change over air handling etc These actions can facilitate the management of toxic smoke and gases throughout the areas served by the duct system DNRW incorporates a sensor cover tamper feature that provides a trou signal at the panel immediately if the cover is removed or improperly in Proper installation of the sensor cover removes the trouble condition programmed with the system control panel two LEDs on each duct detector light to provide local visible indication DNRW provides a remote alarm output for use with auxiliary devices such the RA100Z remote LED annunciator as well as remote test capability with RTS151 or RTS151KEY Remote Test Stations DETECTOR FEATURE SET Uses plug in head UL listed as compatible with the system control panel Sampling tubes install from front and rear Compatible with existing accessories Able to address detector per code switches on sensor head CONTENTS OF THE DUCT SMOKE DETECTOR KIT Sensor power side and covers use appropriate sensor per the system panel Three 10 sheet metal screws for mounting Drilling template One sampling tube end cap One plastic exhaust tube A DST sampling tube must be ordered to complete the installation It be the correct length for the width of the duct where it will be installed Table 1 on page 2 to determine the inlet tube required for different duct 1 EXPLODED VIEW OF DUCT SMOKE DETECTOR COMPONENTS TUBE MODULE HEAD Sensor Module sold separately Refer to the control panel technical documentation for compatible UL listed heads with Remote Test Capability DETECTOR INSTALLATION VERIFY DUCT AIR FLOW DIRECTION AND VELOCITY DNRW detectors are designed to be used in air handling systems hav air velocities of 100 to 4000 feet per minute Duct widths from 6 inches to feet 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 FOR RECTANGULAR SIDE BY SIDE MOUNTING CONFIGURATION punch at four target centers two for sampling tubes and two the rectangular configuration mounting tabs as shown on mounting tem Drill pilot holes at target centers and cut two 1.375 inch diameter using a 13 hole saw or punch Drill 156 inch diameter holes using 5 inch drill at target centers FOR SQUARE TOP OVER BOTTOM MOUNTING CONFIGURATION punch at four target centers two for sampling tubes and two the square configuration mounting tabs as shown on mounting template pilot holes at target centers and cut two 1.375 inch diameter holes a 13 hole saw or punch Drill 156 inch diameter holes using a 5 drill at target centers If desired drill an additional 156 inch hole at location of one of the mounting tabs on the lower housing SECURE THE DUCT DETECTOR TO THE DUCT two rectangular configuration or three square configuration of the pro sheet metal screws to screw the duct detector to the duct Do not overtighten the screws 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 attachment screw rotate the uni

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