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Flame Vision FV282f+ - User Manual

1. 9 6 seconds 9 seconds 12 SWITCH S1 Pagani CONNECTOR BLOCKS RELAYS AND CONNECTOR BLOCK Fig C 3 Switch Location 6 7 SELF TEST The detector normally carries out a complete self test every 20 minutes The self test exercises the pyro electric sensors and the electronics and monitors the window for cleanliness If the window cleanliness test fails on 20 successive occasions 6 hours 40 minutes a fault condition is generated and the fault LED where fitted flashes at the rate of 0 5Hz In this condition the window self test only is automatically repeated every minute until the window clears and window self test passes If the window test continuously fails then the complete self test will still be repeated every 20 minutes Other self test failures will be indicated on the first test after they have occurred For the complete self tests to be run automatically the self test connection on the terminal board must be left open circuit when the unit is powered up In this mode additional self tests may be initiated remotely by connecting OV to the self test terminal refer to the wiring diagrams in Section D 13 The detector may be powered up in such a condition that the window self test can only be initiated remotely on demand the automatic window self test is disabled In order for this to be achieved the detector must b
2. of the signal depends upon the size of the flame and its distance from the detector For liquid fuels the signal level increases as the surface area of the burning liquid increases For any type of fire the signal level generally varies inversely with the square of the distance For convenience fire tests are normally carried out using liquid fuels burning in pans of known area in still air Note The results of fire tests can be significantly affected by weather conditions prevailing at the time eg wind The sensitivity of a detector can then be conveniently expressed as the distance at which a particular fire size can be detected While the FV282f will reject modulated signals from blackbody sources the presence of such sources of high intensity may affect the sensitivity of the detectors It is important to think in terms of distance rather than time because of the different burning characteristics of different fuels Figure C 4 shows the response to two different fuels which ultimately produce the same signal level The signal level given by gasoline quickly reaches its maximum and produces an alarm within about six seconds of ignition Diesel on the other hand being less volatile takes about a minute to reach equilibrium and an alarm is given in about 60 seconds from ignition Note f a fire test is carried out using non miscible fuels then it is strongly recommended that water be placed in the bottom of the pan to keep it cool a
3. secondly by comparing the signal in the guard channel For the FV282f detector there are two areas in the field of view where the guard channel is partly obscured In these areas the discrimination against modulated black bodies is compromised and modulated black body could possibly produce an alarm 19 The areas where this may happen are shown shaded in the field of view diagram in Fig C 9 Detectors should be mounted so that potential hot bodies are not located in the shaded areas This can normally be achieved by rotating the detector VIEWING CONE 180 Fig C 9 Areas Where FV282f May Not Discriminate Between Fire and a Modulated Hot Body 20 7 5 FALSE ALARM DATA The FV282f has been subjected to the following stimuli which might be considered potential sources of false alarms Unless otherwise specified tests were performed at a minimum distance between source and detector of 1 ft 0 3m Detectors were set to maximum sensitivity 164 ft 50m range Steady state sources were chopped at frequencies in the range 1 10Hz RADIATION SOURCE IMMUNITY DISTANCE ft 1 Sunlight No response 2 Sunlight with rain No response 3 100W tungsten filament lamp No response 4 bank of 4 x 32 W No response 5 125W mercury vapour lamp No response 6 1 kW radiant electric fire element gt 1 5 7 2 kW fan heater No response 8 heater gt 3 9 Halogen tor
4. 10 9 FAULT ALARM SELF SCN N C N O C RANGE TEST 16 15 14 13 12 11 10 9 FV282f FV282f O OIG O20 OJ 2E E sin Ld TO MONITOR CIRCUIT TO MONITOR CIRCUIT POSSIBLE MONITORING ARRANGEMENT FAULT Fig D 4 FV282f Relay Interface Wiring Diagram NOTE THE VALUES OF THE EOL AND MONITORING RESISTOR M ARE DEPENDENT ON THE REQUIREMENTS OF THE MONITORING EQUIPMENT EOL 28 4 20mA ea CONTROL EQUIPMENT 24V Lig T 1 t POINT oo 1 E 1 2 3 4 5 6 7 8 ov LINE ov LINE 4 20 SCN IN OUT mA OUT FV282f FAULT ALARM SELF SCN N C c N O C N C RANGE TEST 16 15 14 13 12 11 10 9 Fig D 5 282 4 20mA Interface Wiring Diagram The 4 20mA Interface is a Current Sink 29 3 2 FITTING FERRITE BEADS Fit the ferrite beads to conductors as shown in Fig D 6 For optimum RF suppression each pair of cables must be looped once around the ferrite bead Fig D 6 Fitting of Ferrite Beads 30 SECTION E COMMISSIONING 1 CONNECTING AND COMMISSIONING THE DETECTORS When the system wiring has been successfully tested and the control equipment commissioned the detector electronic assemblies may be fitted Set
5. ECTIONAL SENSITIVITY WARNING WHEN MOUNTING THE FV282f DETECTORS ENSURE THAT THE PART OF THE FLAMEPROOF GUARD INDICATED IN FIG C 5 IS NOT DIRECTED AT THE RISK AREA BEING PROTECTED DO NOT MOUNT THE THE FV282f DETECTOR WITH THIS PART OF THE GUARD DIRECTED AT THE RISK AREA BEING PROTECTED RESTRICTED 7 FIELD OF VIEW DUE TO WINDOW xe GUARD METAL PROTRUSION eo 2821 224 4 1 Gro 9 ident Fig C 5 The sensitivity of the FV282f is at a maximum on the detector axis The variation of range with angle of incidence is shown in Figures C 6 and C 7 for open air tests using 1 ft 0 09m kerosene pan fires with the detector operating at normal range 17 DETECTOR PLANVIEW o 40 30 20 40 FIRE ABOVE DETECTOR FIRE BELOW DETECTOR Fig C 7 Pan Fires Relative Range vs Angle of Incidence Vertical 18 0 DOTTED LINE REPRESENTS 0 8 MAXIMUM RANGE DOTTED LINE REPRESENTS MAXIMUM RANGE lt DOTTED LINE REPRESENTS FIELD OF VIEW HALF MAXIMUM OBSCURED BY RANGE WINDOW PROTECTOR SEE FIG C 6 Fig 8 FV282f Detection Range for Viewing cones of 50 60 70 80 and 902 7 4 HOT BODY DISCRIMINATION FIELD OF VIEW The FV282f flame detector discriminates against false alarms from hot radiating objects in the field of view of the detector This is done firstly by looking for modulation in the flame flicker frequency band 1 to 20Hz and
6. F TEST CONNECTION IS NOT OPENED AFTER A SELF TEST THE DETECTOR WILL REMAIN DISABLED The window self test may be disabled by permanently connecting the self test terminal to pins 3 or 5 before power up This may be desirable in those conditions in which contaminants may make the window appear dirty but which may not affect the ability of the detector to otherwise function normally The detector may be reset by reducing the voltage to less than 2 volts for greater than 0 5 seconds A remote LED may be used with the detector 14 7 PERFORMANCE CHARACTERISTICS 7 1 GENERAL A large number of fire tests have been carried during the development phase of the FV282f detectors to determine their response limits The results of these tests are summarised below In order to appreciate their significance an understanding of the mode of the operation of the detector is necessary and a brief explanation follows 7 2 MODE OF OPERATION BEHAVIOUR IN FIRE TESTS Flaming fires involving carbonaceous materials produce large quantities of carbon dioxide This part of the combustion process gives rise to a very high level of infra red radiation in a narrow wavelength region centred upon 4 3m The radiation from a fire flickers in a characteristic way and the detector uses this flicker signal in conjunction with the black body rejection technique described in Section to discriminate between flame and non flame signals The level
7. FV282f USER MANUAL A INTRODUCTION 1 Introduction 2 Flame Detection Operation 3 General Construction B PRODUCT APPLICATION 1 Application 2 Benefits of the FV282f C SYSTEM DESIGN INFORMATION 1 Introduction 2 Electrical Characteristics 3 Mechanical Characteristics 4 Environmental 5 Ordering Information 6 Operation 7 Performance Characteristics 8 Design of System 9 Approvals and Compliance with Standards D INSTALLATION 1 General 2 Mounting a Detector 3 Detector Wiring E COMMISSIONING 1 Connecting and Commissioning the Detectors F MAINTENANCE 1 General INDEX PAGE NN NON 11 15 22 23 24 24 24 26 31 31 36 36 SECTIONA INTRODUCTION 1 INTRODUCTION The FV282f triple IR flame detectors is FM Approved flameproof see Section 9 The FV282f Advanced Flame Detector has approved Fault and Alarm Relay outputs It also has a 4 20mA Interface The detector offers high performance flame detection capability and excellent immunity to blackbody radiation 2 FLAME DETECTION OPERATION The FV282f detectors analyse radiant energy at three different wavelengths and as such offer the full benefits of Triple IR flame detectors The detector uses a well proven flame detection technique This is based on monitoring for modulated infra red radiation in the 4 3 um waveband corresponding to CO emission It incorporates patented techniques for improved rejection of sola
8. Range Settings are halved if the Range Terminal No 11 is connected to 0 volts If switches SW1 2 and SW1 5 are changed from OFF to ON whilst the unit is powered the change will not be effective until the unit is powered down and re started t In the Variable Signalling Current mode SW1 6 ON the alarm output will always be UNLATCHING ie the setting of SW1 5 has no effect In this mode the final alarm decision and latching should be made at the controller eg PLC _ _ 1 22 ASSEMBLING THE UNIT Connect the hanging cord as a precaution to the top and bottom assemblies as shown in Figure E 2 Connect the two preformed cables from the top assembly to the bottom assembly with the cables running to the centre of the detector Fit the front assembly to the rear assembly Care should be taken to ensure that the internal wiring is not trapped between the terminal blocks and the front assembly It should be noted that a rubber seal is provided between the front and rear sections of the housing and this seal must be clean and dry before assembly It is also important to ensure that no moisture is trapped inside the housing Torque the four socket cap retaining bolts to 7 Ib ft 10 N m maximum At this stage the angle of the detector should be adjusted to view the required area and the fixing nuts and bolts finally tightened The cable from the circuit to th
9. arm it is important therefore that before the window is cleaned the detector should be disarmed by isolating the relevant circuit at the control unit The circuit must be de isolated as soon as cleaning is complete 36 1 3 FAULT FINDING If a fault is indicated at the controller it may be due to a number of self test outputs the most common fault would be obscuration of the window If the remote self test is connected put the controller into the walk test mode by switching the self test input to OV If an alarm is indicated then the window is clean and the front end circuitry is operating correctly Reset the controller and wait two minutes If no fault is indicated then it is likely that the fault was due to a software watchdog timeout which might be caused in rare circumstances by very excessive electrical interference If the detector fails the remote test or no remote test can be performed clean the window and the reflector as specified reset the controller If the detector still shows a fault after a 7 period replace the detector It should be remembered that unless the processor has malfunctioned the detector will still be capable of detecting a fire at higher levels or with greater susceptibility to false alarms unless the window is totally obscured by something other than gradual contamination A faulty detector will be indicated by a flashing built in yellow LED REFLECTOR FACE WINDOW Fig F 1 Reflector and Wind
10. ated LABEL 4 x 0 315 8 3mm SURFACE MOUNTING HOLES SAPPHIRE WINDOW 5 87 149 3mm 6 57 167mm 2 we o IZ 48 d Li 20mm TO 1 2 14 NOTE MAXIMUM HEIGHT WITH CONDUIT ADAPTOR FLAMEPROOF GUARD FITTED OPENING x 2 3 7 94mm Fig 1 FV282f Overall Dimensions 50 ADJUSTMENT 5 3 94 100mm 5 9 149 3 SURFACE MOUNTING DIMENSIONS Fig C 2 Adjustable Mounting Bracket and Surface Mounting Dimensions 4 ENVIRONMENTAL 4 1 GENERAL The design and construction of the FV282f detectors is such that it may be used over a wide range of environmental conditions Relevant limits are given in Para 4 2 4 2 TECHNICAL DATA 4 2 1 TEMPERATURE HUMIDITY PROTECTION AND PRESSURE Operating temperature range 40 to 80 C 40 F to 176 F 110 C 230 F for short durations Storage temperature range 40 C to 80 C 40 F to 176 F Relative humidity up to 95 RH non condensing Enclosure protection NEMA 4 IP66 IP67 Normal operating atmospheric pressure 910mbar to 1055mbar Heat radiation from sun or flame 0 to 1000Wm2 Hazardous location ratings Explosionproof Class I Division 1 Groups B C and D Hazardous location ratings Dust ignitionproof Class II Groups E F and Class III Cable gland entries must be su
11. between the installer and the end user Once this agreement has been reached the system designer can determine the area covered by each detector using a scaled plot based on Figures C 6 to C 7 and the fire test data This plot is best drawn to the same scale as the site plan so that direct superposition can be used to determine detector coverage In carrying out the design certain factors should be kept in mind a For area rather than spot protection the best coverage will normally be obtained by mounting the detectors on the perimeter of the area and pointing into the area b As the FV282f is a line of sight detector any object within the detector s field of view will cause a shadow in the protected area Even small objects close to the detector can cause large shadows The detector should not be mounted in such a position that water will collect on the window d The detectors are passive devices and will not react with one another They may therefore be positioned with their fields of view overlapping 22 9 APPROVALS AND COMPLIANCE WITH STANDARDS The FV282f detector Fault and Alarm relay outputs has been Approved by Factory Mutual The detector is designed to comply with FM3615 Explosionproof Electrical Equipment in systems that comply with FM3260 Flame Radiation Detectors for Automatic Fire Alarm Signalling They are classified as explosionproof for Class I Division 1 Groups B C and D and dust ignitionproof
12. ch No response 10 Car headlights 60W halogen No response 11 Lighted cigarette No response 12 Grinding metal No response 13 Electric arc welding ug rod 120A gt 16 14 Photographic quartz lamp 1000W gt 1 15 Photographic electronic flash unit No response Minolta Maxim Program Flash 5400HS operated in both single and multi flash modes 21 8 DESIGN SYSTEM 8 1 GENERAL Using the information given in Sections 5 and 6 it is possible to design a flame detection system having a predictable performance Guidelines on the application of the above data and on siting of detectors is given in the following paragraphs CAUTION THE GUIDELINES GIVEN CANNOT CATER FOR ALL EVENTUALITIES THAT MAY BE ENCOUNTERED ON A SITE 8 2 FIRE TEST DATA It has been explained in Section 6 that the sensitivity of the detector is most easily specified in terms of its response to well defined test fires Tests are conveniently carried out using a 1 f 0 09m pan Sensitivity to other pan areas is estimated from field trial results 8 3 DETERMINING NUMBER OF DETECTORS It will be clear that the number of detectors required for a particular risk will depend on the area involved and the fire size at which detection is required Large areas or small fires require large numbers of detectors There are as yet no agreed rules for the application of flame detectors and the overall system sensitivity must therefore be agreed
13. dition at intervals of not more than 1 year each detector should be checked for correct operation Any excessive deposits of dirt oil etc should be removed from the detector housing as described in 1 2 Note inspection frequency specified above should be considered as a minimum requirement to be applied in the average environment The inspection frequency should be increased for dirtier environments or those which present a higher risk of physical damage For flameproof detectors the following periodic checks should be made spigot joints should be separated and the faces examined for possible defects sulting from corrosion erosion or other causes b check that all stopping plugs and bolts are in position and tight no attempt should be made to replace or repair windows except by complete assembly replacement 1 2 DETECTOR CLEANING The FV282f detector is relatively tolerant of accumulations of dirt on the sensor window or optical monitoring reflector see Fig F 1 However thick deposits of dirt and oil will cause a loss of sensitivity and a subsequent fault indication Itis recommended that detectors be cleaned using water or a detergent solution A stiff bristle not wire brush may be used to remove heavy deposits Particular attention should be paid to the reflector and sapphire window Figure F 1 Note The act of cleaning or polishing the detector face and window may cause a detector to produce an al
14. e detector should then be routed using cable ties or clips as necessary to minimise the risk of physical damage 1 3 TESTING The detectors may be tested with a specially designed tester called the T210 This is a unit that is offered up to the front of the detector and produces a calibrated signal to check the detector sensitivity This may be set to 50m 25m or 12m ranges The T210 is not flameproof but is Approved for use in hazardous areas The rating is BASEEFA Approved EEx eib IIC T4 for use in Zone 1 and Zone 2 areas for group 2 gasses or lesser hazards rated T1 T4 as defined in EN 50014 1992 Electrical Apparatus for Potentially Explosive Atmospheres General Requirements 35 SECTION F MAINTENANCE 1 GENERAL The FV282f detector contains encapsulated electronic assemblies There are no replaceable or adjustable components within the housing which should not be opened once installed and commissioned Routine maintenance is therefore limited to cleaning and testing the detectors 1 1 ROUTINE INSPECTION At regular intervals of not more than 3 months detectors should be visually inspected to confirm that no physical damage has occurred and that the alignment of the detectors has not been disturbed The detector windows should be checked to confirm that they are not blocked and that no physical obstructions have been placed between the detector and the protected area Check that switch settings are correct In ad
15. e powered up with the self test terminal connected to OV terminals 3 or 5 To initiate the test for the first time after power up the connection to the self test terminal must be opened for at least 5 seconds and then closed again This self test function which takes 10 seconds will commence within 2 seconds of the closing and the result of the test indicated for as long as the connection remains closed If the test passes an alarm condition will be indicated and if it fails a fault condition will be indicated To remove the test indication the connection to the self test terminal must be opened self test fail indication due to a window fault will remain until a window self test is successful and will then unlatch after a 1 minute delay The self test should not be repeated more frequently than every 20 seconds to allow the self test circuitry to recharge as erroneous results may occur Note that if a unit is poorly sited such that sunlight can reach the window test detector element the receive amplifier may saturate In this event that particular test is aborted and if this situation persists for 6 hours 40 minutes the unit will register a fault condition CAUTION A REMOTELY INITIATED TEST WILL PRODUCE AN ALARM SIGNAL FROM THE DETECTOR IF THE TEST SHOWS THAT THE WINDOW IS CLEAN TAKE THE NECESSARY STEPS TO INHIBIT A FULL ALARM CONDITION AT THE CONTROL PANEL BEFORE PROCEEDING IF THE SEL
16. e solidly bonded to a good local ground The detector is supplied with two 20mm to 1y NPT adaptors The two 20mm conduit entries when fitted with the 1 14 NPT provided permit convenient connection of the incoming and outgoing lines with continuity of cable shields provided by internal connectors The NPT adaptors must be used with either o rings or sealant to comply with the IP rating It is recommended that for optimum rejection of radio frequency interferences ferrite beads are used to protect incoming and outgoing cables See section 3 2 Fig D 5 for fitting instructions On completion of installation to ensure no moisture ingress to the detector during the time between installation and commissioning fit the weatherproof cover Fig D 3 Ensure that the ring supplied is fitted to the cover Securely tighten the four socket cap cover retaining screws Figs D 4 and D5 show the wiring diagrams 26 CAUTION THE FITTING OF THIS TEMPORARY WEATHERPROOF COVER DOES NOT CONSTITUTE COMPLETION OF THE CERTIFIED ASSEMBLY DO NOT CONNECT POWER Fig D 3 Protective Cover 3 1 CABLE ENTRY SEALING CAUTION CABLE GLANDS AND STOPPING PLUGS MUST BE SUITABLY SEALED TO PREVENT THE INGRESS OF MOISTURE Only cable glands incorporating an inner cable seal should be used In exposed outdoor areas it is recommended that a shroud be fitted over the cable glands Cable glands should also be sealed to the detector housing by fittin
17. ee Figure A 2 This threshold is positioned so as to minimise the possibility of a false alarm due to the presence of modulated blackbody sources of different temperature and intensity ALARM FLAME 2 77 THRESHOLD ENERGY FLAME SIGNALS Tu BLACKBODY SIGNALS CROSS CORRELATED ENERGY Fig 2 Signal Processing 2 4 DETECTOR CONDITION SIGNALLING The FV282f incorporates two different colour light emitting diodes red for Alarm and yellow for Fault By using different flashing rates for the yellow Fault LED separate indication of detector electronic fault and dirty window optical integrity monitoring is provided 3 GENERAL CONSTRUCTION Figure A 3 shows a general view of a complete detector zzz HORN SECURITY Melbourn Road Bishopstown Cork Ireland GUARD SEAL CONDUIT WITHIN 18 U max 31 5V W max 650mW Ambient Limits 40 to 80 C DO NOT REMOVE OVERS WHII CIRCUITS ARE LIVE FV282f ng CI Div 1 Gro eit ambient 80 ewe Fig 3 FV282f Detector General View The detector is of robust construction to allow its use in harsh environments The detector comprises a two part stainless steel enclosure The front section of the enclosure contains the encapsulated electro optical assembly which is connected to the terminal board on the rear section by a small cableform A sapphire window is fitted in the front of the housing The window allows infra
18. for Class II Groups E F and G Class III and for indoor and outdoor application IP66 67 9 1 PATENTS The FV282f design and manufacture is covered by the following patents UK patents GB 2 281 615 GB 2 335 489 European patent 0 064 811 US patent US 6 255 651 23 SECTION D INSTALLATION 1 GENERAL The FV282f detector may be surface mounted or may use the 5100 200 adjustable mounting bracket for fixing to a convenient rigid surface electrical connections are made via terminal blocks inside the detector rear housing Two 2 14NPT cable entries are provided Guidance on mounting and wiring the detectors is given below 2 MOUNTING A DETECTOR The location of each detector should have been determined at the system design stage according to the principles detailed in Section B and marked on the site plan The actual mounting position must however be decided during installation and in choosing the position the following principles together with the original system requirements should be followed 2 1 CHOICE OF MOUNTING POSITION The following points must be observed when choosing the mounting position a The detector must be positioned such that a clear line of sight is provided to all parts of the risk area Roof trusses pipework supporting columns etc in front of the detector can cause significant shadowing and should be avoided b Ifsupervision of an area immediately below the detector is required i
19. g a nylon washer between their flange and the housing The stopping plugs with a mushroom head and integral ring supplied must be used to plug unused conduit entries The glands stopping plugs should be hand tightened with the addition of at least a further M turn applied by spanner or other suitable tool Alternatively the thread of cable glands stopping plugs used in Safe Area applications may be sealed using PTFE tape or other jointing putty or mastic Flameproof glands stopping plugs may be sealed using any non setting grease or putty as described in IEC 79 14 In applications where the ambient temperature is expected to be 104 F 40 C or higher cable glands with a silicon inner seal must be used and when fitted the shroud must be made of CR rubber CAUTION TO COMPLY WITH FM FLAMEPROOF REQUIREMENTS ALL ADAPTORS GLANDS AND STOPPING PLUGS MUST HAVE A MINIMUM OF 5 THREADS ENGAGED THE CONDUIT MUST BE SEALED WITHIN 18 27 COneer ree ver mee e mue ree eere nec Bonus re eu ue ee CONTROL ha EQUIPMENT l i LI VE a i i Li nct 1 foo oO 455551 110554 1 2 3 4 5 6 7 8 1 2 3 4 5 6 DO 8 OV LINE QV LINE 420 SCN OV LINE OV LINE NOT SCN IN OUT mA OUT IN OUT USE OUT conmRoL 203 PoNT V L FAULT ALARM SELF SCN N O C RANGE TEST 16 15 14 13 12 11
20. indicating an alarm In the latching mode the controller must be reset to remove the alarm condition 11 6 3 FAULT INDICATION The FV282f yellow LED will flash indicating a fault Different flashing rates are used to indicate different faults as follows Window obscuration 0 5Hz 9 Detector fault 2 0Hz 6 4 FAULT SIGNALLING The detectors signal a fault condition as follows Fault relay will open The FV282f detectors may be selected as fault latching or non latching In the non latching mode the fault condition will be cancelled up to 80 seconds after the fault has been removed 6 5 SENSITIVITY RANGE SELECTION The range is switch selectable on a 6 way DIL switch S1 on the backbox terminal PCB The following nominal ranges are available Extended range 164 ft 50 meters Normal range 82 ft 25 meters There is provision for halving the range value selected by the switches If the terminal connector Range is connected to OV then the detection range is reduced to half that of the switch setting This may be done by taking cables to a remote contact the other side of which is connected to the same OV as the reference for Line In supply 6 6 DELAY TO ALARM The minimum delay to alarm is 3 seconds from a fire being present in the field of view that is large enough to be detected This delay is also switch selectable using 6 way DIL switch S1 the following additional nominal values are available
21. itably sealed to achieve the required NEMA rating 10 4 2 2 DETECTOR PERFORMANCE The FV282f detectors are designed and tested to Factory Mutual standards 3260 and 3615 4 2 3 WEATHER SHIELD A Stainless steel weather sun shield is available to reduce the heating effect of the sun in tropical conditions where the detector has to be mounted in direct equatorial sun The shield also provides protection from rain and snow falling on the window The sun shield fits round the bracket and is bolted on to the rear of the detector 5 ORDERING INFORMATION FV282f Relay Interface 516 040 014 5100 5200 Mounting Bracket 517 001 184 5200 Weather Sun Shield 517 001 263 5200 Spares Kit amp Sealant 517 001 266 T210 Infra red Test Source 592 001 016 T210 S200 Adaptor 592 001 014 T210 Nicad battery and charger 592 001 010 Solo 100 telescopic extension pole set 517 001 230 Solo 101 extension pole 517 001 226 Solo 704 adaptor tube B 517 001 224 Solo 610 Carryall bag 517 001 264 For information on the T210 see Section E Para 1 3 6 OPERATION 6 1 ALARM INDICATION A red LED is visible through the front window continuous illumination indicates an alarm 6 2 ALARM SIGNALLING The detectors signal an alarm condition as follows 9 Alarm relay will close The FV282f may be set as alarm latching or non latching In the non latching mode if the alarm source is removed for greater than 5 seconds then the detector will stop
22. nd prevent it deforming A sufficient amount of fuel must be placed in the pan to ensure combustion occurs over all of its area throughout the intended duration of the test 15 N HEPTANE GASOLINE FIRE 1 ft 858 RANGE b DIESEL FIRE 1 ft AT 85ft RANGE a ENERGY T T TIME SECONDS Fig C 4 Characteristics of Fires The time taken by the fire to reach equilibrium depends of course on the initial temperature of the fuel If kerosene were to be pre heated to a temperature above its flash point then its behaviour would be equivalent to that of gasoline at 25 C 77 F The test data presented below refers to fires which have reached their equilibrium condition 7 3 FIRE TEST DATA 7 3 1 N HEPTANE The most reliable fuel for consistent fire tests is n heptane since it quickly reaches its equilibrium burning rate FM detected 1f 0 92 n heptane pan fire axis at 28 5m on 25m setting and 54 4m on 50m setting 7 3 2 OTHER LIQUID HYDROCARBONS Typical ranges achieved with other fuels burning on 1ft 0 09m pans relative to that for n heptane are as follows 50m Range 25m Range Setting Setting Alcohol Ethanol Methanol 6696 83 Gasoline 63 80 Paraffin Kerosene JP4 54 44 Diesel fuel 50 45 The detection range is also a function of pan area Manufacturers field trials indicate that the detection range increases by approximately 20 when the pan area is doubled 16 7 3 3 DIR
23. onsumption without 4 to 20 mA current sink resistor connected Detector supply 28V Quiescent Current 11mA typical Fault relay energized Alarm Current 30mA typical Fault and Alarm relay energized Fault Current 0 4 to 1 1mA pulsing neither Fault or Alarm relay energized Fault relay Normally closed opens under fault conditions Alarm relay Normally open closes under alarm conditions Detector current consumption with 4 to 20 mA current sink resistor connected Detector supply 28V Quiescent Current 15mA typical Fault relay energized Alarm Current 50mA typical Fault and Alarm relay energized Fault Current 2 3 to 3 5mA pulsing There are two 4 20mA output modes see Table 1 Discrete where the output switches from normal to alarm Continuous where the output changes with the input signal and the alarm and pre alrm may be set in the PLC CONDITION ET Non Window Fault 1 5 0 Window Fault 1 5 2 Normal 4 5 4 Alarm 17 5 7 to 17 Table 1 Note 1 The relay contacts are rated 2A at 30V d c 2 Noremote LED option is available 3 MECHANICAL CHARACTERISTICS 3 1 TECHNICAL DATA Dimensions see Figure B 1 Weight 8 4 b 3 8kg Mounting Bracket Weight 2 4 Ib 1 1kg Materials Enclosure Stainless steel 316L Window Sapphire Mounting Bracket Stainless steel 316 S16 Screws etc exposed to the elements Bright stainless steel 316 Electronic Module Encapsul
24. ow 37 NOTICE rights reserved Reproduction of any part of this manual in any form whatsoever without Thorn Security s express written permission is forbidden The contents of this manual are subject to change without notice effort has been made to ensure the accuracy of this manual However should any errors be detected Thorn Security would greatly appreciate being informed of them The above not withstanding Thorn Security can assume no responsibility for any errors in this manual or their consequences Thorn Security Limited Scott Health amp Safety Dunham Lane PO Box 569 Letchworth Monroe Hertfordshire North Carolina SG6 1BE 28111 Tel 44 0 1462 667 700 Tel 1 800 247 7257 Fax 44 0 1462 667 777 0 44 155 2 120 415 862 Issue 2 The right is reserved to modify or withdraw any product or service without notice
25. r energy by use of two 4 3 um filters and for Gaussian noise rejection by averaging the output signal of two separate sensor elements The time to alarm is field adjustable Three different alarm delays of 3s 6s and 12s are provided 2 1 BLACKBODY REJECTION The FV282f incorporates a novel optical filter which enables a single electronic infra red sensor to measure the radiated energy present in two separate wavebands placed on either side of the flame detection waveband at 3 8 um and 4 8 um respectively see Figure A 1 The signal obtained from this guard channel is cross correlated with the signal from the flame detection channel to provide an accurate prediction of the non flame energy present in the flame detection waveband This prediction is independent of the temperature of the radiation source allowing the FV282f to provide blackbody rejection over a wide range of source temperatures D Patented see Section C10 Figure A 1 shows the amount of energy given by a hot object blackbody as viewed in the electromagnetic spectrum This curve has a peak which moves further to the left with higher temperature objects The amount of energy seen between 3 8 um and 4 8 um can be approximated to a linear function Thus a measurement of the energy at these two wavelengths provides information to calculate with sufficient accuracy the level of blackbody radiation at the intermediate flame detection frequency of 4 3 uum The energy due
26. red radiation to fall on the sensors the LED alarm and fault indicators are visible through the window The front section of the enclosure is attached to the rear section by four captive screws A seal provided between the front and rear sections ensures protection to NEMA 4 IP66 IP67 Two L 14NPT cable entries are provided on the bottom electrical connections are made to three 4 way terminal blocks The detector may be fitted directly to a suitable surface or an optional adjustable mounting bracket may be used A stainless steel guard Figure A 3 is fitted to the detectors to protect the integrity of the window SECTIONB PRODUCT APPLICATION 1 APPLICATION 1 1 GENERAL The detectors are intended for the protection of high risk areas in which accidental fires are likely to result in flaming combustion with the production of carbon dioxide Typical materials in this type of risk are a Flammable liquids including petroleum products alcohol and glycol etc b Flammable gases including methane c Paper wood and packing materials d Coal e Plastics These substances ignite readily and burn rapidly producing flame often accompanied by large volumes of dark smoke Note The detectors are not designed to respond to flames emanating from fuels which do not contain carbon eg hydrogen ammonia metals and should not be used for such risks without satisfactory fire testing The FV282f by virtue of its const
27. ruction and rejection of spurious radiation is suitable for use both indoors or outdoors in a wide range of applications Note The detectors should be mounted only to rigid surfaces when the field of view of the detector is covering a large area of blackbody radiation as oscillation of the detector could cause false alarms eg pole mounted detectors in a windy location 1 22 FEATURES 9 A self test facility is incorporated to test a number of characteristics including the cleanliness ofi the window The self test may be initiated remotely Switch selectable range settings Switch selectable time to alarm settings Operational range up to 178 ft 54m fuel dependant Remote control of range Completely solar blind Very low quiescent power consumption High sensitivity to hydrocarbon fire in oily environments Rugged stainless steel 316 housing and mounting bracket Flexible mounting and angular adjustment Ease of installation Connection for remote LED Selectable latching non latching alarm output Selectable latching non latching fault output 2 BENEFITS OF THE FV282f Infra red flame detectors offer certain benefits over detectors working in the visible or ultra violet regions of the spectrum For example they are Highly sensitive to flame thus increasing probability of early detection of hydrocarbon fires Not greatly affected by window contamination by dirt and oil deposits thus decreasing maintenance frequenc
28. t is essential that the angle between the detector and the horizontal is not less than 509 c The detector should not be sited in a position where it will be continuously subjected to water drenching d Inoutdoor installations in areas of high solar radiation some form of sunshade is recommended to prevent excess heating of the detector WINDOW WINDOW SELF TEST RECEIVE APERTURE REFLECTOR WINDOW SELF TEST SELF TEST LIGHT LIGHT SOURCE SOURCE PATH e Precautions should also be taken to ensure the angle of incidence of sunlight either direct or reflected is not such that it can penetrate the receiving aperture of the window test optical path 24 f detector should not be sited in position in which it will be subject to severe icing g The detector must be mounted on a stable structure which is readily and safely accessible for maintenance staff h Wherever possible the detector should be mounted such that the face is tilted downwards at a small angle to prevent water collection and lessen the settlement of particle deposits on the window The detector mounting bracket is to be secured with two 0 315 inch bolts at the mounting centres shown in Fig D 1 A drilling template is provided to allow optimum selection of the mounting centres of the 0 099 inch 2 5mm diameter 0 118 inch 3mm deep pivot hole The detector is to be secured to the bracket using the four 8 screws supplied with the detector Al
29. ternatively the detector may be secured directly to the fixing surface with four 0 315 inch bolts studs or screws at the fixing centres shown in Figure D 1 The surface chosen for the mounting should be flat over the area of the bracket to ensure a stable fixing 50 ADJUSTMENT 3 94 100mm 5 9 149 3 SURFACE MOUNTING DIMENSIONS Fig D 1 Adjustable Mounting Bracket and Surface Mounting Dimensions The FV282f may be operated in any position but the mounting point must obviously be chosen to allow sufficient clearance for adjustment of the angle and must also allow space for the cable assembly A clearance of 8 200mm in all directions from the fixing point will normally be sufficient to allow the full range of adjustment Figure D 2 refers 25 8 200mm Fig D 2 Clearance Required for Full Adjustment 3 DETECTOR WIRING The wiring between the detectors and control equipment must provide the required degree of mechanical protection but allow the detector alignment to be adjusted to suit the area to be protected In order to minimize the risk of radio frequency interference it is recommended that some form of shielded wiring be used The shield may take the form of steel conduit or metal sheathing of the cable and must be suitably grounded Cabling must be terminated through 360 at the detector conduit entry and the detector housing must b
30. the Delay and Table 2 Range Latching switches as required Record the switch settings for future checking during service and maintenance inspections The Window self test may be disabled by linking the self test terminal to before applying power to the unit ie terminal 10 linked to either terminals 3 or 5 Self test may be demanded by taking the input high disconnected and then low again Automatic operation will not restart unless the self test input is disconnected before power up CAUTION DO NOT MOVE THE ALARM OR FAULT LATCHING SWITCHES AFTER THE DETECTOR HAS BEEN POWERED UP 1 1 SWITCH SETTINGS The following tables give the switch settings for switch S1 see Figure E 1 for switch location 31 32 CONNECTOR BLOCKS SWITCH S1 RELAYS AND CONNECTOR BLOCK Fig E 1 Switch Location SW1 3 SW1 4 DELAY TO ALARM FUNCTION OFF OFF 3 POSITIVE SAMPLES FROM 5 ON ON 3 POSITIVE SAMPLES FROM 5 OFF ON 6 POSITIVE SAMPLES FROM 8 ON OFF 12 POSITIVE SAMPLES FROM 14 Table2 Delay Settings All Types one sample per second OFF EXTENDED RANGE 50m ON NORMAL RANGE 25m OFF SWw1 2 FAULT UNLATCHING ON FAULT LATCHING OFF SW1 5 ALARM LATCHING ON ALARM UNLATCHING SW1 6 OFF DISCRETE SIGNALLING CURRENTS 4 20mA only ON CONTINUOUS SIGNALLING CURRENTS Table3 Range and Latching Settings The
31. to the emission from hot carbon dioxide given by a flame is superimposed on that from any blackbody in the detector field of view without adding any significant emissions at 3 8 um or 4 8 um thus enabling proper segregation between non flame signals and flame signals Because a large fire will possibly produce a large amount of black smoke which will behave like a blackbody and may weaken the carbon dioxide peak signals greater than a pre determined upper limit will be classed as a fire The use of an optical processing technique as opposed to the use of two separate electronic sensors for the guard channel improves the overall reliability of the detector by reducing the number of components and eliminating the need for complex calibration procedures during manufacture TEMPERATURE MOVEMENT FLAME ENERGY N N v HOT S BLACKBODY COLD 7 BLACKBODY gt x 4 8 3 8um 4 um WAVELENGTH Fig A 1 Radiation from Objects 2 2 DETECTION RANGE The FV282f can detect on axis a fully developed 1ft 0 09m n heptane pan fire at 164ft 50m on the 50m setting and the same fire at 82ft 25m on the 25m setting A 40ft 12m setting is also available 2 3 DETECTION OF FLAME IN THE PRESENCE OF BLACKBODY RADIATION The ability of the detector to determine accurately the amount of non flame radiation received at any one time by the flame detection channel allows a variable alarm threshold to be determined s
32. y leading to operating cost reduction 9 Able to see flames through smoke and able to see flames through high densities of solvent vapours thus increasing the probability of early detection of hydrocarbon fires over other ultra violet detectors in the same conditions The FV282f have all the above benefits and additionally are Completely solar blind in normal conditions thus eliminating false alarms due to direct or indirect sunlight Insensitive to electric arcs thus eliminating false alarms from welding operations Insensitive to artificial light sources See Section C 6 4 for more details on false alarm performance 9 Sealed to NEMA 4 IP66 IP67 when suitable cable glands and sealant are used ensuring long term reliability in harsh environments SECTION SYSTEM DESIGN INFORMATION 1 INTRODUCTION The electrical mechanical environmental characteristics and the performance of the FV282f flame detector must be taken into account when designing a system which uses these detectors This information is given below together with guidance on detector siting 2 ELECTRICAL CHARACTERISTICS The FV282f provides a relay interface for alarm and fault conditions 2 1 TECHNICAL DATA Supply Voltage 16 8V to 31 5V Voltage at the detector Reset Time Voltage Supply must be reduced to less than 2V for greater than 0 5 seconds Stabilisation Time after reset power up 30 seconds Detector current c

Flame Vision FV282f+ - User Manual

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