System Sensor DH500 Smoke Alarm User Manual
Contents
1. RTS451 RTS451KEY REMOTE TEST STATION LED OPTION 1 PER UNIT 8mA CURRENT DRAW TEST COIL OPTION 1 PER UNIT Figure 5B 95mA CURRENT DRAW The RTS451 RTS451KEY test coil circuit requires an external 24VDC power supply which must be UL listed Comm Line Alarm Initiation Loop UL Listed 1st 2nd Control Panel Detector Detector in Loop in Loop Figure 5C System wiring E for duct detectors using a UL listed control panel H0295 00 6 156 512 07R 2 To determine that smoke is capable of entering the sens ing chamber a visual examination should be conducted to note any obscurations around the sensing chamber If a smoke test is required smoke such as cigarette cot ton wick or punk smoke may be blown directly at the smoke detector head It is important to plug the exhaust and sampling tube hole to prevent ducted air from blow ing smoke away from the smoke detector head Record all test records in the Detector Test Log page 12 AXCAUTION Remember to remove the plugs after this test or the detec tor will not sense smoke in the air duct 7 2 Alarm Tests Before replacing the duct housing cover the detector interconnections should be checked The DH500 may be checked as follows A M02 04 00 Magnet Test 1 Make sure power is applied to the detector 2 Place the painted surface of the test magnet against the housing next to the rib molded onto the outside of the housing see Figure 7 3 The LEDs2. any remaining debris Replacement screens are available part no RS24 7 Vacuum photo chamber then use clean compressed air to blow area clean 8 Replace screen by aligning arrow on top with the field test slot on the base of the detector Push screen into place Screen should fit tightly to chamber Ionization Units 9 Remove the detector cover and screen assembly by depressing the three lock prongs on the top of the cover and rotating the cover counterclockwise The CRT400 Cover Removal Tool makes cover removal easier See Figure 11 10 Carefully pull the screen out of the cover 11 Clean the screen thoroughly with a soft brush or vacu um replacement screen available part no RS14 12 Brush or vacuum the inside of the cover Cover may then be blown out using clean compressed air DO NOT APPLY WATER TO THIS AREA 13 Vacuum the sensing chamber before using clean compressed air to loosen and blow out any remaining debris DO NOT APPLY WATER TO THIS AREA 14 Press the screen back into the cover 15 Replace the detector cover and screen assembly on the sensing chamber Rotate it clockwise to lock it into place 156 512 07R Both Types Of Units 16 Reinstall the detector housing 17 Restore power to the system 18 Put detector into alarm using appropriate method described in STEP 7 PERFORM DETECTOR CHECK page 7 of this manual 19 Notify the proper authorities that testing has been completed and the smo
3. on the detector should latch on as should any accessories i e RA4OOZA RTS451 and the alarm condition should be verified at the control panel Figure 7 Testing detector TEST MAGNET PAINTED SIDE TOWARD HOUSING MOLDED RIB DUCT DETECTOR HOUSING H0275 00 DETECTOR D500 08 00 Figure 8 Detector head removal DETECTOR HEAD TWIST COUNTERCLOCKWISE TO REMOVE DUCT H0276 00 HOUSING TWIST CLOCKWISE TO INSTALL B RTS451 RTS451KEY Remote Test Station The RTS451 RTS451 KEY Remote Test Station facilitates test of the alarm capability of the duct detector as indicated in the RTS451 RTS451KEY manual The DH500 duct detector cannot be reset by the RTS451 RTS451 KEY It must be reset at the system control panel To install the RTS451 RTS451KEY test coil connect the device as shown in Figure 9 wire runs must be limited to 25 ohms or less per interconnecting wire Place the coil in the detector housing with the arrow facing up and pointing toward the detector as in Figure 9 Attach the coil leads to the housing terminals as shown polarity is not important Firmly screw the bracket in place over the test coil 7 3 MOD400 Sensitivity Test After verification of alarm capability the MOD400 test module may be used with a voltmeter to check detector sensitivity as indicated in the MOD400 installation manual The housing cover must be removed to perform this test If the MOD400 readings indicat
4. that a permanent Detector Test Log be set up and maintained with a record for each individual smoke detector in each building Each detector should be clearly described with information on the type of detector the model number the serial number if any the location and the type of environment Data entries should include test dates type of test mode test results maintenance and comments A detector test log is included in this manual Recommended Detector Maintenance Procedure NOTE Notify the proper authorities that the smoke detec tor system is undergoing maintenance and there fore the system will temporarily be out of service Disable the zone or system undergoing mainte nance to prevent unwanted alarms and possible dispatch of the fire department 1 Turn off power to the system 2 Remove and inspect sampling tube filters 3 If filters are heavily coated with dirt replace them with D500 08 00 H0292 00 new filters If they are not heavily coated use a vacuum cleaner or compressed air nozzle to remove dust then reinstall the filters 4 Remove detector from housing See Figure 8 Photo Units 5 Remove detector cover by inserting a small blade screw driver into the slot located 90 degrees from the MOD400 test jack receptacle twisting the cover counterclockwise to remove see Figure 10 6 Lift screen from photo chamber Vacuum screen and cover before using clean compressed air to loosen and blow out
5. 00 156 512 07R D500 08 00 10 156 512 07R Please refer to insert for the Limitations of Fire Alarm Systems Three Year Limited Warranty System Sensor warrants its enclosed smoke detector to be free from defects in materials and workmanship under normal use and service for a period of three years from date of manufacture System Sensor makes no other express warranty for this smoke detector No agent representative dealer or employee of the Company has the authority to increase or alter the obligations or limitations of this Warranty The Company s obliga tion of this Warranty shall be limited to the repair or replacement of any part of the smoke detector which is found to be defective in materials or workmanship under normal use and service during the three year period commencing with the date of manufacture After phoning System Sensor s toll free number 800 SENSOR2 736 7672 for a Return Authorization number send defective units postage prepaid to System Sensor Repair D500 08 00 Department RA ____ 3825 Ohio Avenue St Charles IL 60174 Please include a note describing the malfunction and suspected cause of failure The Company shall not be obligated to repair or replace units which are found to be defective because of damage unreasonable use modifications or alterations occurring after the date of manufacture In no case shall the Company be liable for any consequential or incidental damages for breach of this or an
6. 16 inch O rings Two rubber tube bushings seals Four 6 self tapping mounting screws for the sampling tube 9 One filter adapter 10 One inlet tube end plug 11 Four 6x7 10 cover mounting screws 12 Two 10 speed nuts 13 One test coil and parts bag ee te a 156 512 07R Figure 1 CONDUIT HOLES FOAM INLET SAMPLING TUBE GASKETS SUPPLIED SEPARATELY N i S 5x TUBE Y N END DETECTOR BASE HOUSING MOUNTING SCREWS yy Y j Y f Xe EXHAUST FILTER ADAPTER DETECTOR HEAD SUPPLIED SEPARATELY MAGNET NOTE The inlet sampling tube must be ordered sepa rately It must be the correct length for the width of the duct where it will be installed See Table 1 to determine the inlet tube required for different duct widths Smoke detector heads 1551 ionization 2551 photoelectronic must be ordered separately SAMPLING TUBE FILTERS Installation Sequence Step 1 Verify duct air flow direction and velocity Step 2 Drill the mounting holes Step 3 Secure the housing base to the duct Step 4 Install the inlet sampling tube Step 5 Field wiring Step 6 Install the filters and check pressure differential Step 7 Perform detector check Step 8 Install the cover Step 9 Perform the final system check Testing J amp yo O O N WT UW UUN Step 1 Verify Duct Air Flow Direction and Velocity The DH500 is designed to be used in air handling systems having air
7. INSTALLATION AND MAINTENANCE INSTRUCTIONS DH500 Intelligent Air Duct Smoke Detector Housing Specifications Length 14 5 inches 36 7 cm Width 5 inches 12 7 cm Depth 3 5 inches 8 9 cm Weight 2 8 lbs 1 1 kg Operating Temperature Range Operating Humidity Range Duct Air Velocity Electrical Ratings for DH500 Voltage Range Standby Current nominal Power Up Surge at Max Rated Voltage LED current nominal 14 5 32 VDC Peak 150uA at 24 VDC 1 5mA sec 6mA at 24 VDC Before Installing Please thoroughly read System Sensor s Guide for Proper Use of Smoke Detectors in Duct Applications 156 473 XX which provides detailed information on detector spac ing placement zoning wiring and special applications Copies of this manual are available from System Sensor NFPA Standards 72 and 90A should also be referenced for detailed information NOTICE This manual should be left with the owner user of this equipment IMPORTANT This detector must be tested and maintained regularly following NFPA 72 requirements The detector should be cleaned at least once a year General Description An HVAC system supplies conditioned air to virtually every area of a building Smoke introduced into this air duct sys tem will be distributed to the entire building Smoke detec tors designed for use in air duct systems are used to sense the presence of smoke in the duct The DH500 Air Duct Detector Housings are used w
8. T INLET DETECTOR TUBE TUBE HOUSING D H0109 00 VERTICAL MOUNTING OF HOUSING In no case should more than 2 air inlet holes be cut off the tube There must be a minimum of 10 holes in the tube exposed to the air stream B Installation for Ducts More Than 8 Feet Wide NOTE To install inlet tubes in ducts more than 8 feet wide work must be performed inside the air duct Sampling of air in ducts wider than 8 feet is accom plished by using the ST 10 inlet sampling tube Install the inlet tube as follows 1 Drill a 3 4 inch hole in the duct directly opposite the hole already drilled for the inlet tube 2 Slide the inlet tube with the flange into the right housing bushing Position the tube so that the arrows point into the air flow Secure the tube flange to the housing bush ing with the two 6 self tapping screws 3 From inside the duct couple the other section of the inlet tube to the section already installed using the 1 2 inch conduit fitting supplied Make sure the holes on both of the air inlet tubes are lined up facing the air flow 4 Trim the end of the tube protruding through the duct so that 1 to 2 inches of the tube extends outside the duct Plug this end with the tube end cap and tape closed any holes in the protruding section of the tube Be sure to seal the duct when the tube protrudes 5 Any tube over 3 feet long that doesn t protrude through the duct on the side opposite the housing must be sup por
9. e base of the duct housing The inlet tube is always installed in the right house bush ing with the air inlet holes facing into the air flow To assure proper installation the tube mounting flange is marked with arrows Mount the inlet tube so that the arrows point into the air flow Figure 4 shows the various combinations of tube mounting configurations with respect to air flow INLET TUBE END PLUG AIR FLOW DIRECTION H0108 00 there are more than 2 holes in the section of the tube extending out of the duct select a different tube length using Table 1 Otherwise trim the end of the tube pro truding through the duct so that 1 to 2 inches of the tube extends outside the duct Plug this end with the tube end plug and tape closed any holes in the protruding section of the tube Be sure to seal the duct when the tube protrudes 5 Any inlet tube over 3 feet long must be supported on the opposite side of the duct detector housing 156 512 07R Figure 4 Tube mounting configurations with varying air flow direction and orientation of detector housing Vertical as well as horizontal mounting is acceptable DOTS INDICATE POSITION OF SAMPLING TUBE HOLES AIR FLOW DIRECTION DETECTOR HOUSING EXHAUST TUBE AIR FLOW DIRECTION DETECTOR HOUSING INLET TUBE EXHAUST TUBE HORIZONTAL MOUNTING OF HOUSING EXHAUST TUBE DETECTOR HOUSING EXHAUST AIR FLOW TUBE AIR FLOW DIRECTION DIRECTION INLE
10. e that the detector head is outside of the acceptable range the detector head requires cleaning See Periodic Maintenance Requirements on page 9 7 4 Trouble Test The capability of TROUBLE detection is tested by remov ing the detector head from the duct housing The detector head is removed by turning it counterclockwise about 10 degrees Figure 8 The system control panel should indi cate a trouble condition Reinserting the detector head should clear the trouble condition 156 512 07R Figure 9 RTS451 RTS451KEY test coil installation TEST COIL DETECTOR Step 8 Install the Cover Install the cover using the four screws Be certain filters are installed as specified in Step 6 Make sure that the cover fits into the base groove and that all gaskets are in their proper positions Tighten the four cover screws to 10 in Ibs Step 9 Perform the Final System Check Place the magnet in position as shown in Figure 7 The LEDs on the detector should light Any accessory LED s will also light The system control panel should indicate an alarm condition Periodic Maintenance Requirements Air duct smoke detectors should be maintained at least once a year They should be maintained more often if the detector heads become obviously dirty in less than a year The detectors must also be cleaned immediately after a fire Failure to properly maintain air duct smoke detectors may cause unnecessary false alarms It is recommended
11. ent substitute for ordering the correct length tubes Step 5 Field Wiring Wiring Installation Guidelines All wiring must be installed in compliance with the Canadian Electrical Code and the local codes having juris diction Proper wire gauges should be used The conduc tors used to connect smoke detectors to control panels and accessory devices should be color coded to prevent wiring mistakes Improper connections can prevent a system from responding properly in the event of a fire For signal wiring the wiring between interconnected detectors or from detectors to auxiliary devices it is rec ommended that single conductor wire be no smaller than 16 gauge 1 5 square mm and that two or three conduc tor wire be no smaller than 18 gauge 1 0 square mm The last foot or so of conduit should be flexible steel conduit available in electrical supply houses which facilitates easier installation and puts less strain on the conduit holes in the housing Solid conduit connections may be used if desired Smoke detectors and alarm system control panels have specifications for allowable loop resistance Consult the control panel manufacturer s specifications for the total loop resistance allowed for the particular model control panel being used before wiring the detector loop Wiring Instructions The DH500 is designed for easy wiring The housing pro vides a terminal strip with clamping plates Wiring con nections are made by strip
12. ide Duct Width ST 1 5 1 to 2 ft 0 3 to 0 6 m ST 3 2 to 4 ft 0 6 to 1 2 m ST 5 4 to 8 ft 1 2 to 2 4 m ST 10 8 to 12 ft 2 4 to 3 7 m Step 4 Install the Inlet Tube The inlet tube shown in Figure 3 is identified by a series Figure 3 Air duct detector inlet sampling tube AIR HOLES FLANGE ARROWS MUST FACE INTO AIR FLOW A Installation for Ducts Less Than 8 Feet Wide 1 If the inlet tube is longer than the width of the air duct drill a 3 4 inch hole in the duct directly opposite the hole already cut for the inlet tube If the inlet tube is shorter than the width of the air duct install the end cap into the inlet tube see Figure 3 2 Slide the inlet tube into the right housing bushing Position the tube so that the arrows point into the air flow 3 Secure the tube flange to the housing bushing with the two 6 self tapping screws 4 For tubes longer than the width of the air duct the tube should extend out of the opposite side of the duct If D500 08 00 Figure 2B Installation of foam gaskets over sam pling tube bushings INLET SAMPLING DUCT DETECTOR TUBE BUSHING HOUSING EXHAUST TUBE MOUNTING SCREWS SCREW HOLES FOR ATTACHING DETECTOR HOUSING TO DUCT H0238 00 of air inlet holes on the tube This tube must be purchased separately Order the correct length as specified in Table 1 for the width of the duct where it will be installed The exhaust tube is molded into th
13. ith System Sensor s intelligent model 1551 ionization detector head and model 2551 photoelectronic detector head These two principal smoke detection methods are combined with an efficient housing design that samples air passing through a duct and allows early detection of a developing hazardous condition When sufficient smoke is sensed an alarm signal is initiated at the fire control panel monitoring the detector and appropriate action can be taken to shut off fans and D500 08 00 32 to 120 F 0 to 49 C 10 to 93 Relative Humidity 500 4000 ft min 91 4 1219 2 m min SYSTEM S9 SENSOR 3825 Ohio Avenue St Charles Illinois 60174 1 800 SENSOR2 FAX 630 377 6495 www systemsensor com blowers change over air handling systems etc This can prevent the distribution or isolation of toxic smoke and fire gases throughout the areas served by the duct system Two LEDs on each detector latch ON to provide a local alarm indication There is also a remote alarm output for use with auxiliary devices The DH500 has remote test capability with the RTS451 RTS451KEY Remote Test Station Contents of the Duct Detector Housing Kit The DH500 consists of the following items See Figure 1 See Note 1 on Page 2 for inlet sampling tube and detector supply information Complete housing base and cover assembly Two 10 sheet metal mounting screws Two sampling tube filters One test magnet Drilling template Two 5
14. ke detector system is again operational 20 Other checks that should be made during mainte nance procedures Holes or cracks in duct work near vicinity of detec tor Air leaks where detector housing or sampling tubes are attached to duct Dust accumulations in or on sampling tubes Wiring terminal screw tightness Accessories Part No Remote LED RA400ZA Remote Test Station RTS451 RTS451 KEY Piezo Alert Sounder PA400 Replacement Filters F36 05 00 Magnet M02 04 00 End Plug For Sampling Tube P48 21 00 Installation Kit Parts bag A2650 01 Figure 10 Photo head exploded view REMOVABLE HEAD COVER TEST SLOT CLEANABLE SCREEN P N RS24 W O THERMAL HEAD COVER REMOVAL SLOT VANED CHAMBER H0261 00 D500 08 00 Ionization Replacement Screen RS14 Sensitivity Test Kit MOD400 Ionization Cover Removal Tool CRT400 Programming Specifications Requirements for Intelligent System Control Panels The 1551 and 2551 models can be used with the DH500 if the following constraints are observed There is a limit to the number of devices per zone that can have their LEDs latched ON The actual number of devices is determined by the control panel and its ability to supply LED current Refer to the equipment manual supplied by the control panel manufacturer for details Figure 11 lon head exploded view HEAD COVER LOCK PRONGS A REMOVABLE Ai COVER FOR CLEANING sss REMOVABLE SCREEN P N RS14 H0296
15. ping approximately 1 2 inch of insulation from the end of the wire sliding this bare end under the plate and tightening the clamping plate screw Step 6 Install the Filters Most duct installations are subject to dust accumulation System filters remove a large percentage of this contami nation but cannot remove all of it Dust inside the duct detector causes problems First very fine particles of dust can enter the detector sensing chamber and cause the unit to go into alarm Second the accumulation of dust and dirt necessitates a more frequent periodic cleaning schedule which can result in substantial cost and or down time Disposable sampling tube filters can greatly reduce the nuisance alarms caused by dust and can also significantly extend the maintenance interval To install the sampling tube filters simply push the filter adapter into the exhaust tube and then push the filter onto the adapter tube on the D500 08 00 left as shown in Figure 6 Then install the other filter over the end of the inlet sampling tube Filters require periodic cleaning or replacement depend ing on the amount of dust and dirt accumulated Visually inspect the filters at least quarterly inspect them more often if the dust accumulation warrants it Replacement filters can be ordered from System Sensor exhaust tube intake tube filter P N F36 05 00 The filters do not substantially affect smoke performance under normal conditions There is ve
16. ry little restriction of smoke entry even when up to 90 of the filter is clogged Visual inspection is usually adequate to determine whether the filters should be replaced because such a high percent age of contamination is required to affect performance However if further testing is desired a Dwyer Model 460 or equivalent Differential Pressure Gauge may be used Simply compare the differential pressure readings with and without the filters attached There should be little or no difference If the difference exceeds 10 replace the filters In no case however should the pressure differential be less than 0 01 inches of water or greater than 1 2 inches of water Step 7 Perform Detector Check 7 1 Air Flow 1 To verify sufficient sampling of ducted air use a manom eter to measure the differential pressure created from air flow across the sampling tubes The pressure should measure no less than 0 01 inches of water and no greater than 1 20 inches of water Figure 6 Sampling tube filter installation INLET SAMPLING TUBE Ep MES SCREWS N En PRG E DETECTOR BASE 2 ES EXHAUST FILTER ADAPTER DETECTOR HEAD SAMPLING TUBE FILTERS PUARO 156 512 07R RA400Z RA400Z or RTS451 RTS451KEY RA400Z RTS451 RTS451KEY 4 RA400Z or RTS451 RTS451KEY Comm Line D500 08 00 REMOTE ALARM LED OPTION 1 PER UNIT 8mA CURRENT DRAW Figure 5A EXTERNAL POWER SUPPLY
17. ted by other means D500 08 00 NOTE An alternate method to using the ST 10 is to use two ST 5 inlet tubes Remove the flange from one of the tubes and install as described above After the installation use electrician s tape to close off some of the sampling holes so that there are a total of 12 holes spaced as evenly as possible across the width of the duct NOTE Air currents inside the duct may cause excessive vibration This vibration can slowly open the seal around the tube and permit air to escape To prevent this from occurring a 3 inch floor flange available at most plumbing supply houses may be used This flange connector mounting technique makes the initial installation easier because a 1 inch to 1 1 4 inch hole may be drilled where the flange connector will be used It is easier to push the inlet tube through the larger hole Modification of Inlet Sampling Tubes There may be applications where duct widths are not what is specified for the installation In such cases it is permis sible to modify an inlet sampling tube that is longer than necessary to span the duct width Use a 0 193 inch diameter 11 drill and add the appro priate number of holes so that the total number of holes exposed to the air flow in the duct is 10 to 12 Space the additional holes as evenly as possible over the length of the tube 156 512 07R NOTE This procedure should only be used in an emergen cy and it is not intended as a perman
18. velocities of 500 to 4000 feet per minute Be sure to check engineering specifications to ensure that the air velocity in the duct falls within these parameters If neces sary an Alnor Model 6000 P velocity meter Dwyer 460 dif ferential pressure gauge or their equivalent may be used to check the air velocity in the duct D500 08 00 DUCT DETECTOR HOUSING TERMINAL STRIP DUCT DETECTOR COVER SAMPLING TUBE MOUNTING G Noe SCREWS H0297 00 Step 2 Drill the Mounting Holes Remove the paper backing from the top and bottom of the template Affix the template to the air duct at the desired mounting location Make sure the template lies flat and smooth on the air duct Center punch hole targets and remove the template Drill the holes as indicated on the template Slide the two speed nuts over the two small holes Hole A next to the sampling tube bushing holes Hole B previously drilled in the duct See Figure 2 Step 3 Mount Duct Housing Remove the duct housing cover Slide the foam gaskets over the tube bushings as shown in Figure 2B Make sure the two small holes in the gaskets line up with the two base mounting holes Put one 5 16 inch O ring over each of the two 10 sheet metal screws Use the two sheet metal screws to secure the duct housing to the duct Do not overtighten the screws 156 512 07R Figure 2A Speed nut mounting location HOLE B H0116 00 Table 1 Sampling Inlet Tubes Tube Outs
19. y other Warranty expressed or implied whatsoever even if the loss or damage is caused by the Company s neg ligence or fault Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you This Warranty gives you specific legal rights and you may also have other rights which vary from state to state I56 512 07R DETECTOR TEST LOG Detector Identification Information Manufacturer and Serial Date Detector Model Number Installed Description of Detector Location Test Results and Maintenance Data Date Test Test Maintenance Tested Description Results Performed Comments D500 08 00 12 156 512 07R 2003 System Sensor
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