Related Manuals for Hochiki America Corporation SPC-24
Summary of Contents for Hochiki America Corporation SPC-24
- Page 1 INSTALLATION PROCEDURE FOR SPC-24 PHOTOELECTRIC BEAM DETECTOR Issued January, 2007...
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Page 2: Table Of Contents
4. Terminal layout and part designation ............... 16 4.1. Emitter ............................16 4.2. Receiver ............................16 5. Summary of the SPC-24's functions ..............17 5.1. Alarm signal output and indicator lamp ................... 17 5.2. Fault signal output and indicator lamp ..................17 5.2.1. - Page 3 5.4. Sensitivity and operation setting....................18 5.5. Total obscuration of the beam....................18 5.6. Automatic compensation for change of receiver's signal strength .......... 18 6. Specification ......................19 7. Sensitivity selection .................... 20 8. Troubleshooting....................21 8.1. Operating indicator LED fails to flash ..................21 8.1.1.
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Page 4: General Description
1. General Description The photo-electric beam detector consists of an emitter and a receiver which face each other at a distance of between 5 and 100 meters. In the event of fire the smoke generated will decrease the amount of near infra-red light incident on the receiver. -
Page 5: Installing The Detector
2. Installing the detector 2.1. Siting Select a suitable position for the installation of both emitter and receiver, such that there are no visible obstructions between them. Remember that the beam detector works on the principle of reduction of light between the receiver and emitter. If there is any possibility of an object remaining within the beam for a few seconds then the siting of the detector is unsuitable. -
Page 6: Mounting And Removing The Detector
2.2. Mounting and removing the detector The detector can be fixed to the metal bracket by hooking the detector body to the four prongs of the mounting plate and then by sliding down firmly until the detector is locked into place and then locking using the locking screw. (see Figure 1). Removal of the detector can be achieved by slackening the locking screw and pressing the locking mechanism located on the bottom left hand side of the detector housing. -
Page 7: Opening The Detector Cover
2.3. Opening the detector cover Hold the detector cover between the thumb and fingers near the top of the cover and squeeze the cover firmly so that the top of the cover expands slightly. The cover can then be pulled away from the detector housing. This should be done by pulling the cover at an angle of 45°... -
Page 8: Installation Procedure
6 inches from the wall and strip 5 inches of the outer insulation jacket. Push cable wires through the hole in the back side of the SPC-24. The SPC-24 will accept wire sizes ranging from 14 to 20 AWG. - Page 9 Figure 4 Wiring method (3) Hook the back of the detector body to the 4 prongs of the mounting plate and slide down firmly, ensuring that the cables are not trapped or damaged by the detector. The detector body should lock into place by the locking mechanism which is located on the bottom right hand corner of the detector and then secured using the locking screw.
- Page 10 Emitter Emitter 24V+ 24V- End of Line Relay zone+ End of Line Resistor Value dependant on Control Panel. Receiver Receiver Check with manufacturer. Figure 7 Wiring diagram for 3-wire connection In order to comply with regulations for device and wiring supervision it may be necessary to use an end of line relay and end of line resistor. Also the contact across the detection zone for fire is a relay contact and it will generally be necessary to include a resistor or other current limiting element in series with the relay contact.
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Page 11: Closing The Detector Cover
2.5. Closing the detector cover Move the cover upwards so that the cover engages with the top of the detector housing. Then hook the top of the cover over the metal hook protruding outward from the top of the detector housing. Pull down the top of the cover ensuring that it is flush with the detector housing top. -
Page 12: Setting The Sensitivity & Switches For Operation
When installing the units in a dimly lit area, it may be difficult to see the receiver and emitter. In this case alignment can be made by turning the alignment adjustment wheels until the alignment setting LED can be seen in the centre of the sight hole. Set the distance switch on the emitter according to the monitoring distance, then close the cover on the emitter. -
Page 13: Signal Strength Adjustment
Ｓensitivity Ａdjusutment ＯＦＦ ＯＦＦ ＯＮ ＯＦＦ ３ ２ １ ４ ＯＦＦ ＯＮ ＯＮ ＯＮ Fault signal reset ＯＦＦ auto Not use ＯＮ manual Figure 11 Sensitivity and operation setting 2.6.3. Signal strength adjustment The reception signal level can automatically be initiated by closing the cover on the receiver. -
Page 14: Sensitivity Check Procedure
Hochiki detector removal pole, thus enabling testing of the filter from ground level. SPB-24N filters have been designed as disposable test filters for testing the Hochiki SPB-24N or SPC-24 beam detector and have been manufactured from plastic. -
Page 15: Maintenance
3. Maintenance 3.1. General The detector contains an automatic compensation function, which allows the detector to operate correctly even when the amount of signal reaching the receiver has changed (the compensation rate is ±1%/20 minutes). This means that minor changes due to contamination and beam alignment will not affect the sensitivity of the detector. -
Page 16: Terminal Layout And Part Designation
4. Terminal layout and part designation 4.1. Emitter Light Beam Adjustment Light Beam Adjustment Screw (Horizontal) Screw (Vertical) Alignment Setting LED (Green) Operating Indicator LED (Green) Distance Setting Switches SW1, SW2 Emitter Wiring Terminals Figure 12 Emitter Construction 4.2. Receiver Light Beam Adjustment Light Beam Adjustment Screw (Vertical) -
Page 17: Summary Of The Spc-24'S Functions
LED on the receiver. It should be noted that the SPC-24 has a sophisticated processing and analysing circuit and therefore a fire will not occur immediately the obscuration exceeds the sensitivity value, but will take typically 10 to 15 seconds to produce the fire signal. -
Page 18: Indication Of Normal Operation
5.3. Indication of normal operation When the covers of the receiver or emitter are closed then the green LED visible through the outside of the case will flash every 3 seconds to indicate that the detector is operating correctly. If the cover of the receiver is open then both green LED's (the centre alignment LED is not visible unless the cover is open) on the receiver will flash every 3 seconds. -
Page 19: Specification
6. Specification Installation Environment Indoor use only Principle of Operation Light beam obscuration(near infra-red) Rated Voltage 24VDC Rated Current 50mA Emitter : 15〜41VDC Operating voltage range Receiver : 15〜33VDC Peak surge voltage 42V Emitter : 50μA （at 24V,25℃） Supervisory current(average) Receiver : 200μA （at 24V,25℃） Compensation method 1% every 20mins. towards initial value Compensation limits +50% to -50% of the initial value Fire condition Red fire LED on receiver illuminated and fire relay closes Fault condition Yellow fault LED on receiver flashes and fault relay opens Set up condition : Both green and yellow LED's flash Monitor condition ... -
Page 20: Sensitivity Selection
7. Sensitivity selection If requirements or standards are provided for the sensitivity of the photoelectric beam detector and a test filter, the selection of sensitivity and its test should be performed in accordance with them. Otherwise, set the sensitivity select switch so that the sensitivity falls within the sensitivity setting range recommended by the manufacturer in accordance with the monitoring distance. -
Page 21: Troubleshooting
8. Troubleshooting The following conditions relate to the SPC-24 itself. 8.1. Operating indicator LED fails to flash 8.1.1. Receiver The operating indicator LED should flash every 3 seconds. If it does not the reason may be as follows :- No power on the receiver... -
Page 22: Detector Generates Fire - Panel Does Not Register Condition
Contamination limit has been exceeded (light received has changed by more than 50%) The CPU is unable to initialise the detector correctly as the values read are out of range The detector cover has been closed without setting the sensitivity The detector cover has been opened The optical axis has been altered suddenly. -
Page 23: Installation Guide Lines
9. Installation guide lines The Hochiki SPC-24 beam detector must be installed according to the requirements laid out in National or local standards. The following guidelines for installation are provided to give information in certain installation conditions where no advise or regulations are provided by the relevant standard. -
Page 24: Installation In Saw-Tooth Type Ceilings
Figure 16 Installation in circular shaped ceilings 9.4. Installation in sloped ceilings The installation for a sloped type roof or ceiling will be as shown in Figure 17. Either position A or B is acceptable for installation of the SPC-24. -
Page 25: Installation In A Monitor Roof
Figure 17 Installation under a sloped ceiling 9.5. Installation in a monitor roof The installation for a monitor roof should be performed as in Figure 18. The detector's installation height should be 0.8H or higher. If there is a ventilation in the top part of the roof then the detector must be placed below the opening. -
Page 26: Corridor With Open Adjoining Aisle
Figure 19 Installation in a closed corridor 9.6.2. Corridor with open adjoining aisle When the detector is installed in a corridor with an area adjoining which is open as shown in Figure 20 it is necessary to consider the adjoining area as a separate detection area. Figure 20 Installation in an open corridor 9.6.3. -
Page 27: Installation Precautions
Figure 21 Installation in a corridor with corners 9.7. Installation precautions The following precautions are necessary when installing beam detectors:- • In a room where an air inlet is positioned in the ceiling the beam detector should be placed near to the air inlet. •... -
Page 28: Smoke Patterns
9.8. Smoke Patterns The following smoke patterns should be considered when considering beam detector installation: Figure 22 Typical smoke patterns Hochiki America Corporation 7051 Village Drive, Suite 100 Buena Park, CA 90621-2268 USA Tel (714) 522-2246 Fax (714) 522-2268 Technical Support...
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