FLAME DETECTORS - Vibro
Contents
1. lt te is cc Q FIG 2 TYPICAL HYDROCARBON FIRE SPECTRUM a SPECIFICATIONS Environmental All Models e Suitable for use in hazardous locations Class I Division 1 Groups B C amp D Class II Division 1 Groups E F amp G NEMA 4 rated Electrical Interface e Nominal voltage input 24VDC 20 Min 32 Max e Maximum allowable ripple voltage 240mV e Current Draw 24 VDC Manual Auto Standby Alarm Test Test 860 660 XX0XX 90mA 110mA N A N A 860 660 XX1XX 90mA 110mA 250 250mA e Relay Contact rating 860 660 Industrial Models 2 Amps 30 VDC Resistive Relay Contact rating 660 High Temperature Model 4 Amps 30 VDC Resistive Note Each detector contains two relays 1 Fire 1 Fault e Current Loop Output 0 to 20 mA Industrial Temperature Models Only 20 mA Fire 16 mA UV or IR only 860 only 4mA Normal OmA Fault e RS485 Half duplex Addressable User Interface Baud Rate 9600 bits per second 1 start bit 8 data bits and 1 stop bit e Power consumption 24 VDC Manual Auto Standby Alarm Test Test 860 660 XX0XX 2 16 W 2 64 W N A N A 860 660 XX1XX 2 16 W 2 64 W 6W 6 W Mechanical Specifications Figure 3 Shows Nominal Dimensions Length 5 98 inches max Height 4 90 inches max Width 5 50 inches max Weights installed Aluminum Housing Stainless Steel Shipping weight Aluminum Housing Stai2. Bit 7 is always ON For revision A it allows for error checking during RS485 User Interface UI transmission If a transmission occurs and bit 7 is not set The Series 660 and 860 Flame Detectors are equipped then the trans mission is not valid Starting with revision with a two wire half duplex serial communication B if bits 4 through 7 are set to logic one then the relay interface which is called the User Interface Ul The coil is open If bit 3 through 7 are set to logic one then the RS485 UI will allow up to 31 detectors to be networked non volatile memory has been corrupted ae TABLE 3 Status Message for RS485 U Bit 7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit 1 Bit 0 Always Manual Auto Auto Milliamp Warning Warning Fire On Test Test IR Test UV Fault IR UV Fault Fault Fault For revision A in order for the buss arbiter to interrogate the network it must first send out an ASCII character S or s which is the number 83 or 115 Then the buss arbiter must wait for 5 milliseconds before sending out a detector address number This delay time will allow the detectors to exit from the flame detection mode and be preparing to respond to the address number The detector address number must be sent by the buss arbiter in the form of two ASCII characters from 0 through 9 or numbers 30 through 39 The first characte
3. Model 660 Switch position 5 is used to select two detection speeds The normal speed utilizes a slower sampling rate and automatic self test interval The high speed setting increases the data sampling rate and auto self test frequency Toggling switch position 5 ON activates the normal speed option Toggling switch position 5 OFF activates the high speed option The normal speed option is the factory setting and recommended for most applications Industrial or Aircraft Hangar Applications Model 860 Switch position 3 is used to select the application setting If the detector is to be installed in an industrial environment i e fuel loading rack compressor building and tank farm switch position 3 should be ON If the application is for an aircraft hangar switch position 3 should be OFF The false alarm immunity will be slightly diminished from that of the industrial setting Fire Event Analysis Level or Il Model 860 Switch position 4 allows the detector to run the Fire Event Analysis FEA program of your choice FEA Level is for installations with normal UV background levels i e no welding FEA Level II should be used where detectors are required to detect flames while welding or other UV generating sources are present Turning switch 4 ON selects FEA Level I Turning switch 4 OFF will provide FEA Level Il Level Il has slightly diminished false alarm immunity as compared wit
4. toggle the option on the USI OFF and reset the detector by toggling the power off then on If the fault condition continues to be activated then the problem is in a different area Models 660 XX1XX and 860 XX1XX Flame Detectors are equipped with automatic self test in addition to the manual test Approximately every 15 minutes the automatic self test is actuated and for a brief time interval the optics and electronics are checked for functionality The exception to this is for the high speed setting on 660 models In this configuration switch 5 OFF self test is actuated approximately every 2 minutes A failure of the automatic self test is annunciated by the activation of the Fault Outputs If a detector goes into a fault condition the optical surfaces should be checked for cleanliness Clean sensor windows and light guide ends are necessary for the detector s to pass self test After the optical surfaces have been inspected and cleaned reset the detector If the detector is wired for manual test perform the manual test The typical response time should be from 0 6 seconds beyond the actual fire output time delay WARNING During Manual Test the fire output will be actuated Always disable extinguishing circuits before testing If the detector continues to go into a fault condition following a cleaning of the optical surfaces check the supply voltage and wiring terminals 8 or 9 and 10 or 11 Look for loose or in
5. 20mA 7 No O to 20 mA 7 RS485 UI 8 No RS486 UI 8 Program 9 No Program 9 Denotes factory settings for auto test units only SPST DIP SWITCH S1 LOCATED ON BOARD P N 71043 OPTION OFF ON Automatic amp Manual Test Activated 1 2 No Test Feature 12 Manual Test Only 2 1 Automatic Test Only 1 2 Sensitivity Level 1 3 4 i Level 2 3 4 Level 3 4 3 Level 4 3 4 Detection Speed Normal Speed 5 High Speed 5 Fire Output Latching 6 Fire Output Non latching 6 0 to 20mA 7 No 0 to 20 mA 5485 UI 8 No 5486 Ul 8 Program 9 No Program 9 Denotes factory settings for auto test units only FIG 7 SWITCH CONFIGURATIONS FOR THE 860 XXXXX UV IR FLAME DETECTOR FIG 8 SWITCH CONFIGURATIONS FOR THE 660 0XXXX UV FLAME DETECTOR SPST DIP SWITCH S1 LOCATED ON BOARD P N 71044 OPTION OFF ON Automatic amp Manual Test Activated 1 2 No Test Feature 1 2 Manual Test Only 2 1 Automatic Test Only 1 2 Sensitivity Level 1 3 4 Level 2 3 4 Level 3 4 3 Level 4 3 4 Detection Speed Normal Speed 5 High Speed 5 Fire Output Latching 6 Fire Output Non latching 6 RS485 UI 7 No RS486 Ul 7 Program 8 No Program 8 Denotes factory settings for auto test units only FIG 9 SWITCH CONFIGURATIONS FOR THE 660 1XXXX UV FLAME DETECTOR UV or IR
6. Warning Model 860 Switch position 5 is used to enable the UV or IR Warning Outputs If switch position 5 is ON this option is activated If switch position 5 is OFF this option is not activated This option will alert the user to the presence of high levels of either UV or IR within the field of view of the fire detector UV or IR Time Delay Models 860 The UV or IR outputs can be configured to delay for up to 63 seconds before annunciation of one of these emissions If the UV or IR signal disappeared prior to the end of the set time delay then the detector would not allow the outputs to toggle ON The factory setting is 35 seconds To adjust the UV or IR outputs time delay use Pot R48 Turning the Pot CCW will decrease the time delay One turn equals approximately five seconds Note Always reset power to the detector after adjusting the pots The detector will not recognize any new setting unless it is reset Sensitivity Levels Model 660 Table 1 Switch positions 3 and 4 adjust the sensitivity to four different levels Level 1 being the most sensitive to UV radiation and the most susceptible to false alarms Level 2 is the factory setting and is recommended for most applications The following are the logic levels for the two switch positions Table 1 Model 660 Sensitivity Settings Sensitivity Level Position 3 Position 4 1 Max OFF OFF 2 OFF ON 3 ON OFF 4 Min ON ON Detection Speed
7. must be ON When the UV or IR Outputs are activated it will cause the fault relay and the amber LED to be ON constantly If the O to 20 mA option is ON it will send the output to 16 ma The UV or IR warning are non latching outputs and will change states if the problem source is removed This alarm is used as a tool to help prevent unwanted alarms An UV or IR warning should always be inves tigated with caution If possible remove the source of radiation as a constant presence of UV may reduce detector sensitivity and compromise its discrimination ability Inspect the protected area and beyond UV from source such as welding can be sensed at great dis tances If no radiation sources are apparent cover the detector with opaque material to test whether the UV or IR warning disappears when the sensor windows are blocked Continue searching for the source of UV or IR if necessary If the warning does not disappear after blocking the windows a sensor may be faulty and in need of repair RS485 User Interface Ul If no communication has been established check the wiring to be sure that the polarity is not reversed on the two wires The network can be daisy chained but it does require two 1200 terminating resistors in order to minimize reflections One resistor should be placed at the controller or buss arbiter The other resistor should be placed at the farthest location from the controller or buss arbiter RS485 allow
8. 60 Series Flame Detectors have been approved by major third party approval agencies All installations should comply with local fire codes and regulations Do not proceed with the installation if you do not understand the installation procedure or operation of the detectors Meggitt Avionics applications engineers are available to assist you INSTALLATION To ensure trouble free operation and reliable fire protection follow these installation guidelines 1 Locate the Detector s in an area where they will have an unobstructed view of the area to be protected and where extraneous sources of ultraviolet radiation will not affect the performance of the fire detectors These sources include but are not limited to nuclear radiation x rays electrical corona and unshielded quartz halogen lamps Prolonged exposure to a continuous source of UV radiation will diminish false alarm discrimination The detectors must be accessible for cleaning Failure to maintain clean sensor windows and self test optics when so equipped will impair the performance of the detector 2 Separate the base from the housing by removing the four M8 x 1 25 cap screws This will require a 6mm hex key Store the housing assembly containing the electronics in a clean and dry environment while installing the base 3 Mount the detector base to a previously installed swivel mount or other appropriate support structure so that the detector has an unobstructed vie
9. 85 F to 212 F 65 C to 100 C Standard Features High Temp Model e Relay contacts rated at 4 Amps 30 VDC Resistive e Operating Temperature 40 F to 257 F 40 C to 125 C e Storage Temperature 85 F to 302 F 65 C to 150 C Optional Features All Models e Stainless Steel Housing explosion proof Approvals e The detectors are approved by most major approval agencies e Certified to MIL STD 461C EMI RFI susceptibility IEC 801 2 ESD and surge susceptibility test and IEC 801 5 e Passes requirements of MIL STD 810E for shock vibration rain and humidity e European Rating EExd IIB 5 e CE approved Fire Detection Performance All Models e 50 millisecond response to a saturating signal e One second typical to a 1 ft by 1 ft gasoline fire at 50 feet e Two seconds or less to a 2 ft x 2 ft fire of JP 4 JP 8 Jet A Jet B AVTUR and AVGAS at 100 feet e Three seconds or less to a 10 ft x 10 ft fire of JP 4 JP 8 Jet A Jet B AVTUR and AVGAS at 250 feet e 120 degree horizontal field of view Figure 1 Fire Detection Performance Model 860 1XXXX e 340 milliseconds or less to a silane flame from a 0 010 inch orifice at 30 feet e 2 9 seconds or less to an 8 inch diameter hydrazine fire at 60 feet e 3 0 seconds or less to a hydrogen flame from a 0 75 inch diameter orifice with a flow rate 1 5 SCFM at 35 feet Response Time Model 660 High Speed Setting e 15 milliseco
10. DROCARBON NON HYDROCARBON NOTES 12 1 The Model 660 13000 does not have a 0 to 20 ma option TB1 1 ls 2 R5485 120 Ohm resisior is terminating usa one at the beginning of the loop and at the very end 3 E a on application of power 4 Earth Ground should be attached lo clamp in the base OMNIGUARD Sensors Division Meggitt Avionics Inc 10 Ammon Drive Manchester NH 03103 7406 Tel 603 669 0940 Fax 603 669 0931 Email ind meggittavi com http meggittavi com AP 8 00
11. OMNIGUARD 660 and 860 SERIES OPTICAL FLAME DETECTORS INSTALLATION AND OPERATING SERVICE MANUAL OMNIGUARD Sensors Division Megoitt Avionics Inc 10 Ammon Drive Manchester NH 03103 7406 Publication No 1031229 Rev C TABLE OF CONTENTS Description can dace 1 Theory of 2 Specificati nS sasas sas enoa aaa aa a a rei 3 Applications scassati ces aa ia nai ca G 3 Installation aaa it a 4 Electronics 4 5 6 7 8 9 Maintenance and Troubleshooting 9 10 11 Service and 11 Wan EE i 12 Part Number Key 12 CAUTION Electrostatic Discharge A discharge of static electricity from an ungrounded source including the human body may damage the electronic circuitry of the Omniguard Series 660 and 860 Flame Detectors Use one or more of the following methods when handling or installing electrostatic sensitive parts e A wrist strap connected by a ground cord to an earth ground source Heelstraps toestraps or bootstraps at standing workstations e Conductive field service tools A portable field service kit with a static dissipating work mat DESCRIPTION The O
12. ch the optical surfaces and impair performance UV WINDOW LIGHT GUIDES IR WINDOW FIG 10 OPTICAL SURFACES Troubleshooting WARNING Do not attempt to repair a detector Study these troubleshooting guidelines and review the referenced sections of the manual prior to performing maintenance on the fire detection system New Installations If any or all the detectors fail to operate check the system wiring and power supply Tight reliable wiring connections are essential as are low resistance connections from every detector housing to earth ground Measure the voltage between terminals 8 and 10 at the detector locations to verify that the supply voltage is within range Note Voltage at detectors installed farthest from power source will be lower than the no load supply voltage due to line losses Maximum load condition occurs during manual test The Omniguard 660 and 860 Series Flame Detectors employ sensitive and sophisticated electronic circuitry in the fire detection process Power line transients or excessive power supply ripple may therefore cause erratic or intermittent operation DC powered detectors function best with ripple free less than 1 percent supply voltage power supply filtering may be necessary to improve performance Note For reliable operation the instantaneous supply voltage at the input to any detector must not fall below 20 Vdc or exceed 32 Vdc Failure To Alarm Upon detec
13. ectable interface If the addition of the manual test feature is desired then toggle the switch position 1 to ON If only the manual test feature is needed then toggle the switch position 1 ON and 0 to 20 mA Output Models 660 0XXXX and 860 XXXXX switch position NOTE To determine the proper configuration of the RS485 7 selects the 0 to 20 mA output option If this output is UI refer to the firmware revision block on the nameplate utilized then switch position 7 must be ON to engage which is a stamped pad located to the right of the model the peripheral Otherwise if this output is not used name The pad will contain a letter character to indicate switch position 7 must be kept OFF or it will cause the the firmware revision level Fault Outputs to turn ON Table 2 illustrates the order of priority For the Model 660 0XXXX priority 2 is N A The detector provides the RS485 UI with a Status Message After a status request is made the detector TABLE 2 Milliamp Logic Chart will send out for revision A a one byte word that represents the Status Message and starting with revision B a six byte response packet which the fourth byte contains the status message As shown in Table 3 the status message has seven alarm bits and one valid transmission bit When bits 0 through 6 are at logic zero the alarms are OFF When bits 0 through 6 are at logic NORMAL one the alarms are ON
14. ground radiation such as near UV black light visible light sunlight and blackbody radiation thereby providing a very high signal to noise ratio The IR sensor is responsive to 4 4 microns This Spectral frequency is always present in a hydrocarbon fire due to the excitation of hot carbon dioxide molecules Additionally the option is available in which the IR sensor is responsive to 2 9 microns as well as 4 4 microns This option enables the detector to sense certain non hydrocarbon fires The detector s autonull feature eliminates interference due to background radiation in these regions of the spectrum The 860 Flame Detector not only requires the coexistence of UV and IR radiation but also their presence in specific ratios The ratio must conform to the radiation pattern of specific fires see Figure 2 This patented Fire Event Analysis FEA ensures the highest possible discrimination between fire and non fire sources The 660 Series Flame Detectors The Omniguard 660 Series Flame Detectors are single spectrum detectors utilizing the same ultraviolet sensor tube as described for the 860 Series Flame Detector The 660 Flame Detector requires only that a signal with in the detection envelope of the UV sensor be present in a pre defined strength for a specified time duration These parameters are user adjustable and will determine the sensitivity and response time to all fires TYPICAL HYDROCARBON FIRE SPECTRUM n N
15. h Level Relay Adjustments Models 660 0XXXX and 860 XXXXX and Model 660 1XXXX There are two relays and Configuration Option Jumpers JP1 and JP2 located on the exposed surface of the printed circuit board PCB in the housing assembly Using these jumpers the relays may be configured as normally open or closed The factory will ship the detectors with the following settings 1 Fire relay K2 normally open will close when there is a fire present beyond the fire time delay setting will close when manual test is activated beyond the length of time for the fire delay time setting Note The red light emitting diode LED will be illuminated when relay transfers 2 Fault relay K1 normally open will close when power is applied Model 860 after 2 seconds and Model 660 less then a second will open when power is lost or fuse F1 on process PCB is open will open when detector fails automatic test will open when detector fails manual test Note The amber LED will be illuminated when relay transfers unless there is a loss of power Note Any adjustments to the user options listed above to a controller i e customized fire panel or personal should be done with the power OFF The detectors will computer The controller will perform the buss arbiter not recognize any changes until the microprocessor is duties because the network is in half duplex mode This reset Removing the
16. he sensor windows and light guide ends After cleaning initiate the manual test If the detector again fails manual test check the wiring to the supply voltage terminals 8 or 9 and 10 or 11 The detector may not be receiving enough power the wiring connections may be loose or intermittent If the red LED is illuminated and there is no fire output then check all the connections to the fire alarm panel or annunciating devices A defective test switch may prevent the test circuit from initializing Initiate the manual test by connecting a wire from the test switch terminals to the positive terminal of the input power supply Replace the switch if the manual test operates when the wire is connected UV or IR Warning In addition to detecting fire the Omniguard 860 Series Flame Detectors will annunciate a warning of potentially hazardous conditions that could cause a fire For example welding a process which emits a far greater proportion of UV radiation than IR will cause an actuation of the UV or IR Outputs but not the Fire Outputs For this detector to actuate the Fire Outputs it must sense the simultaneous presence of UV and IR in a ratio characteristic of the fire type s to which the detector is configured When the detector senses persistent source of intense UV or IR radiation such as welding sparks or radiant heat the UV or IR Outputs will change state To enable the UV or IR Outputs the UV or IR option switch 5
17. m the housing assembly This will result in the voiding of the warranty 6 Use a 20 to 32 Vdc regulated and filtered power supply with a ripple not exceeding 1 percent The detectors should be protected from induced and transients voltages as well as radio frequency interference RFI To ensure compliance to CE requirements a dedicated conduit is highly recommended for the detector wiring Connect every detector housing to earth ground via an independent wire i Tinn Dica db on rer a 0 iNi opion TE i BRA Rii cit eee sic eg Sirip EP agio rey vred si ihe rp ord a i 4 art Gener scusi sierra Tieg nta FIG 4 WIRING DIAGRAM ELECTRONICS User Selectable Factory Settings The electronic module has been factory configured to provide the user with the following Time Delay 660 860 3 Seconds fire 860 35 Seconds UV or IR warning Sensitivity 860 Fire Event Analysis Level I Industrial 660 Level 2 Normal Relays Fire Normally Open Latching Fault Normally Open Relay is failsafe it closes upon application of power to detector non latching cleared after successful test Optical Self Test Automatic Only Self Test Models to 20 mA 660 0XXXX 860 XXXXX OFF RS485 660 860 OFF HI Z mode FIG 5 660 0XXXX AND 860 XXXXX USER SELECTABLE OPTIONS LOCATIONS User Selectable Interface USI Options Refe
18. mbers 82 or 114 The detectors are shipped from the factory with the detector address number of 00 When the RS485 UI option is OFF it will cause the detector to place the RS485 line driver into a High Z Output Mode This will protect it from transients when the network option is not being used Starting with revision B in order for the buss arbiter to interrogate the network it must send out a six byte control packet to the network The packet formation is comprised of the byte definition shown in Table 4 The first byte is the protocol start value for the control packet The second byte represents the detector address high byte which is the tens digit of the detector address The third byte represents the detector address low byte which is the ones digit of the detector address The fourth byte is the secondary command This is used to control the detector The fifth byte is a spare and may be used in the future The last byte is the checksum of the control packet This is calculated by first summing the previous five bytes Then taking the total and performing a modulus 256 The result is the checksum TABLE 4 Control Packet Definition for RS485 UI ASCII Byte Value Byte Definition Byte 1 K 154 4B Protocol Start Byte 2 O to 3 484 to 51430 to 33 Det Addr Hi Byte Byte 3 9 484 to 574 30h to 39 Det Addr Lo Byte Byte 4 0 484 SO No Sec Comma
19. mniguard 660 and 860 Series Flame Detectors are optically based self contained microprocessor controlled ultraviolet infrared UV IR and high speed ultraviolet UV flame detectors The 860 Flame Detector utilizes the patented Fire Event Analysis FEA discrimination technology These Flame Detectors are compatible with most alarm panels without the need for a controller All electronics are housed within a copper free aluminum high temperature TGIC Polyester coated enclosure with a 3 4 14NPT or M20 1 5 conduit entry A stainless steel enclosure is also available The 660 and 860 Series Flame Detectors are suitable for use in Class I Division 1 Groups B C and D explosion proof areas and Class II Division 1 Groups E F and G dust ignition proof areas The housings are NEMA 4 dust tight and watertight The detectors are approved for both indoor and outdoor installations Standard Features All Models e Microprocessor Based e 0 to 60 seconds user adjustable time delays e User adjustable latching or non latching fire relays e User adjustable sensitivity e User adjustable NO or NC relay outputs e LED indication fire red fault amber e Transient voltage surge protection e RS485 addressable user interface Standard Features Industrial Models e 0 to 20 mA output e Relay contacts rated at 2 Amps 30 VDC Resistive e Operating Temperature 40 F to 185 F 40 C to 85 C e Storage Temperature
20. nd Byte 4 T 844 54h Init Manual Test Byte 4 R 824 52h Unit Reset Byte 5 0 484 30h Spare Byte 6 checksum Sum bytes 1 5 mod 256 If the transmission byte packet is recognized as valid then the detector will recognize the secondary command byte and perform the function If the No Secondary Command is enabled The detector sends a response packet containing the status message The packet formation consists of the byte definition shown in Table 5 TABLE 5 Response Packet Definition for RS485 UI ie ASCII Byte Value Byte Definition Byte 1 S 834 53h Protocol Start Byte 2 0 to 3 484 to 514 30 to 334 Det Addr Hi Byte Byte 3 0 to 9 484 to 574 30 to 39 Det Addr Lo Byte Byte 4 NA 1284 to 255480 to FF Status Byte Byte 5 0 484 30h Spare Byte 6 checksum Sum bytes 1 5 mod 256 To enable the Manual Test Command turn switch 1 to the ON position In turn the detector test lamp is illuminated for a period of time based on the customer selected fire time delay After the fire alarm is activated the unit transmits the response packet indicating the fire alarm bit set and terminates the manual test If a fault occurs then the detector transmits the response packet indicating the maual test fault bit set and terminates manual test If the Unit Reset Command is provided the unit sends the response packet indicating the prese
21. nds to a saturating UV source Note Detector response times and distances can be influenced by wind smoke and viewing angle Consult Meggitt Avionics Inc Application Engineers for specific details 4 5 SEC RESPONSE TIME TYPICAL o 1 SECOND RESPONSE TIME TYPICAL DETECTION PERFORMANCE ENVELOPE TO A 1 X1 PAN FIRE SOURCE ACTUAL DETECTION DISTANCE WILL BE GREATER FIG 1 MODEL 660 860 FLAME DETECTOR HORIZONTAL FIELD OF VIEW 14 THEORY OF OPERATION The 860 Series Flame Detectors The Omniguard 860 Series Flame Detectors are multi spectrum detectors which provide a high degree of discrimination by sensing widely separated flame emission spectra both of which are found in hydrocarbon and certain specified non hydrocarbon fires Sophisticated signal processing is accomplished by microprocessor technology Automatic self testing of the electronics sensors and optical surfaces is accomplished using light guides This self interrogation is done a minimum of four times per hour thus providing the ultimate in fire detection reliability The two spectral regions selected for sensing fire signals are the Ultraviolet UV and Infrared IR The UV sensor is the stable highly reliable Edison UV photon sensor tube which has a peak response centered around 0 22 microns The design of the tube is optimized for the highest sensitivity to the UV radiation emitted by a flame with the lowest response to back
22. nless Steel 5 0 Ibs 2 4 kg 13 Ibs 6 3 kg 6 Ibs 2 8 kg 14 Ibs 6 7 kg Optional accessories Swivel Mount 4651027 aluminum Shown in Figure 3 Air Shield Kit 8001023 Portable Test Source Swivel Mount 70991 stainless steel 4 OPTIONAL SWIVEL MOUNT gt PART NUMBER 4651027 CONDUIT ENTRY Weight Aluminum housing 5 Ibs 2 3 Stainless Steel housing 3 lbs 5 8 kg FIG 3 660 860 MECHANICAL SPECIFICATIONS APPLICATIONS The Omniguard 660 and 860 Series Flame Detectors are designed for fire detection applications where sudden fires from hydrocarbon fuels or when proper options are selected from specified non hydrocarbon fuels may occur These detectors are not recommended for smoldering or electrical fire hazards The following is a partial list of fuels which emit ultraviolet and infrared radiation Response time and detection distances vary Consult Meggitt Avionics applications engineers for specific details Hydraulic fluid Methyl Ethyl Ketone wood products jet fuels Methane Kerosene Propane plastics gasoline Propylene Acetone fuel oil Acetylene Methyl alcohol Ethyl alcohol Isopropyl alcohol Heptane Toluene Epoxy powders crude oil Butane Hydrogen Hydrazine Silane The rugged weatherproof construction and the operating temperature range of the detectors will accommodate a variety of indoor and outdoor applications The Omniguard 660 and 8
23. nt status of the detector and performs a software reset An initialization period of 2 3 seconds during which the unit is non responsive to communication occurs after software rests or initial application of power Note All detectors in the network must be programmed to a valid detector address number from 01 through 31 For Revision A during the time that detectors are being polled they will be removed from fire detection mode Therefore this should be done only when necessary and as quickly as possible Programming the Detector Address Number On models 660 0XXXX and 860 XXXXX this option is activated when switch position 9 is toggled ON The option is deactivated when the switch is in the OFF position For model 660 1XXXX switch position 8 performs this task This option provides the user with a method of programming the unit number into the non volatile memory of the microprocessor To program the detector address number first remove power from the detector Then toggle the program option ON and set the first five switches on the user selectable interface USI to the detector address number In program mode the USI becomes a binary programmer as illustrated in Table 4 When a switch is toggled ON it will equal the binary weighted number These binary weighted numbers are added together when a multiple number of switches are switched ON i e if SW2 and SW3 were closed then the detec
24. power does this means that only one transmitter is allowed on the Caution Upon applying power insure that the detector network atone Ume remains on for at least 5 seconds to allow for complete Activating The RS485 Option initialization to take place On models 660 0XXXX and 860 XXXXX switch position 8 enables this option when it is toggled to the ON position It becomes disabled in the OFF position For model 660 1XXXX switch position 7 performs this task This option provides the user with a half duplex serial communication network interface for up to 31 Fire Outputs Latching or Non Latching Models 860 and 660 switch position 6 selects the latching or non latching Fire Outputs option To select latching the switch position 6 must be toggled ON The Fire Outputs signal will remain engaged as long as power remains ON or until the detector is reset through the RS485 User Interface Ul If you select non latching The RS485 UI has two methods for configuring the by toggling switch position 6 to OFF then the Fire network For either method the unit has to be Outputs signal will disengage after a fire is extinguished programmed to a detector number from 01 through 31 The detector number will give the Flame Detector Optical Self Test Models 660 XX1XX and 860 XX1XX These models address on the network For the first method the RS485 UI option is ON If any alarm state change
25. r must represent the tens digit of the address number and the second character will be the ones digit All single digit address numbers such as 1 through 9 must have an ASCII character 0 or number 30 sent for the tens digit After the buss arbiter sends out the detector address number and a detector recognizes the number it will send back the status message The buss arbiter can then continue until all detectors are polled throughout the network If the RS485 UI option is enabled and the detector that sent the El out was not polled It will continue to send the El out once the buss arbiter releases the network To perform a manual test on a Flame Detector in the network the buss arbiter must first send out an ASCII character or which are the numbers 67 or 99 Again it has to wait 5 milliseconds before sending out the detector address number Once the buss arbiter sends out the detector address number and the detector recognizes the command the detector will send back the ASCII character ACK which is the number 6 Then the buss arbiter must send out the ASCII character or t which are the numbers 84 or 116 The detector will then send back an ASCII character T and enter the manual test mode The detector will stop manual test when it gets polled for the status To perform a network reset of all detectors the buss arbiter must send out the ASCII character R or r which are the nu
26. r to Figures 5 and 6 for Locations of User selectable Options Figures 7 8 and 9 provide the user with a quick reference of switch setting options for the various models The text following these figures describes in more detail the function of each switch setting Fire Time Delay Models 660 0XXXX and 860 XXXXX and Model 660 1XXXX The fire outputs can be configured to delay for up FIG 6 660 1XXXX USER SELECTABLE OPTIONS LOCATIONS to 63 seconds before annunciation of a fire If the fire were to extinguish anytime prior to the end of the set delay time the detector would not declare a fire The factory setting for this delay time is 3 seconds To adjust the fire outputs delay time use Potentiometer Pot R49 Turning the Pot counterclockwise CCW will decrease the time delay One turn equals approximately five seconds Note If the Model 660 is using the high speed option then the maximum delay time setting will be one second Each turn of the Pot will equal 50 milliseconds SPST DIP SWITCH S1 LOCATED ON BOARD P N 71043 OPTION OFF ON Automatic amp Manual Test Activated 1 2 No Test Feature 1 2 Manual Test Only 2 Automatic Test Only 1 2 Industrial Applications 3 Aircraft Hangar Applications 3 Fire Event Analysis Level I 4 Fire Event Analysis Level Il 4 IR UV Alarm 5 No IR UV Alarm 5 Fire Output Latching 6 Fire Output Non latching 6 0 to
27. s the detector will send out an Enquiry Interrupt El The El is the ASCII character ENQ which is equal to the number 5 Once a fire detector starts to transmit the El on the network it will lock out any other detector from sending out the El The detector will continue to transmit the El every second until the buss arbiter has requested a status from it For the second method when the RS485 Ul option is OFF the detector will be inhibited switch position 2 OFF If no optical testing is preferred from sending the El network 5 still active but the then ensure that both of these switches are OFF detectors will only transmit information or perform a Models 660 and 860 do not have either function when the buss arbiter interrogates them For the manual or the automatic test feature and do not test both methods ihe detector will wait for a minimum of 16 the lens for optical clarity Switch positions 1 and 2 are ms before it will send a response to the buss arbiter non applicable N A in these detectors This delay time allows for the buss arbiter to release the network from its transmit mode have a through the lens optical clarity checking feature The factory setting is for automatic test only switch position 1 is OFF and switch position 2 is ON See Figure 5 and 6 for location of the switches and Figures 7 8 and 9 that describe the switch settings for the user sel
28. s Flame Detectors are designed for years of trouble free operation with minimal attention Periodic cleaning of the optical surfaces is essential however for maintaining reliable fire protection The frequency of required cleaning will be determined by the environmental conditions in and around the installation The detectors should be regularly inspected for a build up of dust or other contaminants on the optical surfaces The detection specifications presented in this manual are predicated on performance with clean sensor windows Contaminants such as dust oil and paint will reduce sensitivity Severe contamination on the light guides or sensor windows will cause a failure of the auto test A detector that fails auto test due to dirty optical surfaces may be capable of detecting fire but its effectiveness will be limited Cleaning Procedure Locate the following optical surfaces Figure 10 Models 660 XX1XX 1 UV Sensor Window 2 UV Light Guide End Model 860 XX1XX 1 UV Sensor Window 2 UV Light Guide End 3 IR Sensor Window 4 IR Light Guide End Note Models 660 XX0XX and 860 XX0XX are not equipped with light guides Clean the optical surfaces with a cotton swab wetted with commercial liquid glass cleaner ammonia methanol or isopropyl alcohol Rinse with clean water and dry with lens quality cloth Repeat with methanol if needed to remove smudges Caution Wiping with excessive force or inappropriate materials may scrat
29. s up to 4000 feet of 24 AGW twisted pair wire driving into 1200 loads SERVICE AND REPAIR Contact Meggitt Avionics or your Meggitt distributor for service and repair information Do not send material or equipment to Meggitt without a return authorization When requesting a return authorization state the complete detector part number and serial number Omniguard 660 and 860 Series Flame Detectors are not field serviceable An unauthorized attempt to repair or re calibrate a detector will void the warranty Detectors should be carefully packed to avoid damage from shock moisture and dust Use the original shipping carton if available Wrap the detector in plastic before packing Provide ample packing material to cushion the detector For most repairs only the detector head will need to be returned After removing the head cover the detector base with plastic to protect the base from moisture and dust if a spare head is unavailable WARRANTY The warranty period is thirty six 36 months for the Omniguard 660 and 860 Series Flame Detectors and five 5 years for both the UV and IR Sensors Meggitt Avionics Inc will at its option repair and return without charge freight prepaid any Omniguard product used in accordance with Meggitt ratings and instructions and confirmed by Meggitt to be defective in workmanship or materials This warranty shall be valid only if the product is returned within the applicable warranty period
30. se the relay to de energize If the fault relay output fails to change state within 2 seconds after power up and the amber LED fails to illuminate Then there may be no power reaching the detector s electronic module Check the supply voltage the condition of the fuse located at F1 on the PCB and the wiring to terminals 8 and 10 Also inspect the wiring to the fault relay terminals 6 and 7 and the jumper JP1 that sets the fault relay option Note Models 660 0XXXX and 860 XXXXX Flame Detectors are equipped with a 0 to 20 mA option A loss of power will result in a constant 0 mA output If the fault relay output continues to be inoperative isolate the relay contacts by disconnecting the external wiring to the fault relay terminals Connect an Ohmmeter across the fault relay terminals and monitor for an actuation of the relay Repair the external wiring if necessary Fault Condition Models 660 0XXXX and 860 XXXXX Flame Detectors are equipped with a 0 to 20 mA output When the 0 to 20 mA option is not used in your application make sure that the 0 to 20 MA option is OFF on the USI If the 0 to 20 MA option is ON and at any time the drive line opens or the current sense does not equate to what is suppose to be there it will cause the activation of the fault outputs Check the wire terminal 15 and insure that a good signal ground is present at terminals 10 or 11 To insure that the 0 to 20 mA option causes the fault condition
31. termittent connections During normal operation the fault outputs will change state on power up The output will return to its original state if power to the detector is removed If the fault output is intermittent or erratic check the supply voltage and wiring to terminals 8 or 9 and 10 or 11 Inspect the fault relay wiring on the detectors Repair or tighten any loose connections For the Model 860 if the UV or IR option is ON the fault relay will be flashing at a 1 Hz rate whenever a fault conditions exists Manual Test Failure WARNING This test will activate the fire outputs Always disable extinguishing circuits before testing A manual test is actuated by connecting the 660 XX1XX or 860 XX1XX test circuit terminal 12 to the plus terminal of the detector s input power supply terminals 8 or 9 During manual test the optical and electronic systems of a detector are checked Upon successful completion of the test the fire outputs will be activated Also the red LED inside the detector visible through the UV window will turn ON The typical response time is 0 6 seconds beyond the actual fire output time delay If the detector fails to respond to a manual test check to see if the USI manual test option is ON It will be switch 1 If the detector fails manual test by activating the fault outputs or the response time is longer than expected the optical surfaces of the detector may require cleaning Clean t
32. tion of fire the fire outputs will activate and the red LED visible through the UV sensor window will turn ON If during testing a detector fails to alarm inspect the sensor windows for cleanliness Clean sensor windows are essential for effective optical fire detection Clean all the optical surfaces per the cleaning procedures previously described and retest the detector Should the detector continue to be inoperative check the supply voltage and all associated wiring Incorrect power supply voltage or loose connections will cause marginal or intermittent performance Alarm Condition No Fire Present A detector in alarm condition when no fire is present may be caused by an inadvertent actuation of the manual test Except for Models 660 XX0XX and 860 XX0XX the Series 660 and 860 Flame Detectors feature manually initiated self test of the optical and electronic systems Verify the light guides are illuminated If they are then check the manual test wiring and the test switch for broken loose or intermittent connections Repair or tighten any faulty connections If the light guides are not illuminated then contact your Meggitt Avionics Representative 10 Confidence Condition Model 660 and 860 Flame Detectors are equipped with a fault relay to annunciate a change in the operational status of the detector When power is applied to the detector the fault relay will energize within 2 seconds A loss of power will cau
33. to the factory at Manchester NH USA properly packed and with all transportation charges prepaid All warranty 660 0 0 1 0 Example 660 00100 860 0 0 1 0 Example 860 00100 ii periods commence from the date the product is shipped to the end user provided that delivery is within six 6 months of the date the product was originally shipped from the factory There are no warranties of merchantability fitness or implied warranties of any kind or representations for any other Meggitt product except the warranty specified herein In no event shall Meggitt be liable for any consequential special or other damages attributable to our product The buyer is solely responsible for the proper installation maintenance and use of the Omniguard Flame Detectors and agrees Meggitt Avionics Inc is not in any way liable for any special incidental or consequential damages whatsoever AGENCY APPROVALS FIRE RELAY CONFIGURATION 0 LATCHIN 1 NON LATCHING TEST FEATURE 0 NO SELF TEST 1 AUTO SELF TEST HOUSING MATERIAL CONDUIT ENTRY MINUM 3 4 14 NPT W 5 STAINLESS STEELY 3 414 3 ALUMINUM M20 1 5 WHITE 5 STAINLESS STEEL M20 1 TEMPERATURE RATING 0 INDUSTRIAL TEMP FIRE DETECTOR 1 HIGH TEMP FIRE DETECTOR AGENCY APPROVALS FIRE RELAY CONFIGURATION 1 NON LATCHING TEST FEATURE 0 NO SELF TEST 1 AUTO SELF TEST HOUSING ME NE ENTRY NUM 3 4 14 NPT 3 STAINLESS STEEL I NG 0 HYDROCARBON 1 HY
34. tor number would equal a 6 SW1 SW2 SW3 SW4 SW5 1 2 4 8 16 TABLE 6 Binary Weight for Switch States ON When power is applied to the detector The detector will sense that it is in program mode and read the first five switch positions From the switch setting it will determine the detector number Once the number has been determined the detector will enter it into the non volatile memory of the microprocessor Next the amber LED will flash ON a certain number of times The number of flashes will be equal to the detector s address number Then it will hold the fault relay and amber LED ON constantly for about 10 seconds Then the detector will repeat flashing the detector address number and the delay time It will continue this mode for up to 5 minutes Once you are sure that the proper number is programmed then shut the power OFF and set the USI options to suit your application Reference the section on the USI if you are not sure which option is best for your application or call a Meggitt Avionics application engineer Note In the case that the program option switch is left ON and the detector is installed on the network The detector will go through the same process as explained previously but after 5 minutes the detector will resume the last USI setting that it had prior to going into the program mode MAINTENANCE AND TROUBLESHOOTING Omniguard 660 and 860 Serie
35. w of the area to be protected Position the base such that the conduit opening faces down It will be necessary to seal the conduit within 18 inches of the fire detector enclosure This will insure that water and airborne moisture do not enter the detector housing through the conduit Provide conduit drains as necessary to prevent moisture from collecting inside the conduit 4 Determine the critical areas where fires are most likely to occur Use these areas as focal points for aiming the detectors The detectors have a conical field of vision as shown earlier in Figure 1 The type of fuel and the size of the fire will determine the range of detection Aim the detector at a point equal to or below horizontal so that water dust and dirt will not accumulate on the optical surfaces of the detector As a general rule mount the detector so that it will view the base of the area to be protected 5 Complete the installation by wiring the detector according to wiring diagram Figure 4 Before assembling the detector housing to the base verify that the terminal block assembly is plugged in all the way and is located at the top Insure that the wires are arranged so as not to interfere with the main electronics module If a Torque wrench is available it is recommended that the four cap screws be tightened to a value of 35 to 40 in Ibs 3 95 to 4 52 NM Note The electronics module contains no re useable parts It should never be removed fro
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