m07192 flamgard + issue 6 280211.qxp
Contents
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3. SUO1 9N1 SUI 3 3 CROWCON Gas Detection You Can Trust Flamgard Plus Flameproot Flammable Gas Detector with Non intrusive One man Calibration Pius Installation operating and maintenance instructions MO7192 Issue 6 02 2011 WOO UDOMOIO MMM S Q AA Bs woo uoomo sajes ew L970 S729 99 XE 9E6Z SY29 99 L egegz SejodeBuls x lduuoO jeu snpu YOS Ued OZ 90 doo uepued v6 40019 p S1u uunui suj uo m5o5919Gdq UODMOID JO a1odebuls LUOD UOOMOIO MW 81IS Q AA LUOO UOOMOJO MesSnsgjes ewg YYOL 296 698 L a 6e0l Z296 698 NOOMOd9 S 008 L JO 9269 ZZS 008 L JE YSN Sr8l 8L0Lr Anuy g buepg peoy spue uoluSy Z p s1lu uunia1lsul uol 525919Gd uoSAoiS s9INO VSN UUOO UOOAAOJO AWAA 81IS Q M UUOO UOOA AOJO P ew CSO Ler OL ILe XE Coc leor OL Le OL SPUBLOUJON WePJE OY Sr890 6c Weo que p S USUINAYSU uo 5919 d UDDMOID 2dINO uuppi loti WOO UCOMOIO MMM 91IS Q M LUOD UOOMOIO SEIeS EWU 6VZZSS SEZTL O prt xe OOLLZSS SSZL O prt OL AN AAL VEXO lluspiojxO uopbulqy yed sseuisng uopbulgqy Aem Spueyoelg z p slu uunia1lsul u0o328 3q uoSAoiS s9IHO AN ANYdWOD VWIVH V 1 INTRODUCTION 1 1 Product overview Flamgard Plus is a flameproof flammable gas detector suitable for use in zone 1 or 2 hazardous areas It is designed to detect flammable gas present in ambient air at concentrations not exceeding the Lower Explosive Limit LEL
4. of the target gas for which it is calibrated A local display and magnetically operated switches allow non intrusive one man calibration without a hot work permit Powered by 24 V dc nominally Flamgard Plus provides a 4 20 mA signal sink or source proportional to the gas concentration and can also be fitted with optional alarm and fault relays For a list of flammable gases that can be detected please contact Crowcon 1 2 Product description Flamgard Plus comprises four parts 96HD sensor housing junction box amplifier and terminal board Diagram 1 details Flamgard Plus The overall assembly is certified EEx d IIC T6 in Europe and Class 1 Zones 1 amp 2 AEx d IIC T6 in the USA The 96HD sensor housing is a modular stainless steel assembly that dismantles to allow plug in pellistor sensors to be replaced easily see Diagram 4 The assembly screws into an M20 entry on the junction box The junction box is manufactured from marine grade alloy and is supplied with 2 x M20 1 2 NPT for USA cable entries for customer use Alternative cable entries are available from Crowcon The amplifier plugs into the terminal board and is held in place by two captive screws The amplifier provides power to the pellistor sensor local display and controls and a 4 20 mA signal proportional to the gas concentration for connection to a control panel To remove turn screws anti clockwise and use them to pull amplifier out of the enclosure All electri
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6. Off As standard AL1 20 LEL and AL2 40 LEL _ RELAY VERSION ONLY Table 1 LED status indicator summary Table 2 shows maximum cable distances given typical cable parameters CSA Resistance Ohms per km Max distance mm awg Cable Loop m ft EONO 18 1 36 2 1000 3280 less 12 1 2112 1500 4920 Table 2 Maximum cable distances for typical cables Acceptable cross sectional area of cable is 0 5 to 1 5 mm Table 2 provides guidance only actual cable parameters for each application should be used to calculate maximum cable distances 3 4 Electrical connections All connections are made via the terminal board mounted in the base of the junction box see Diagram 2 The 3 wires from the 96HD are colour coded and should be terminated in the corresponding colour coded terminal terminals 4 5 amp 6 Terminals 1 O Vdc 2 12 30 Vdc and 3 4 20mA signal are connected to the control equipment Flamgard Plus is factory set as a 4 20 mA source device unless specified otherwise when ordering See Section 2 to change configuration Diagram 3 summarises the electrical connections Note The junction box and cable armour must be earthed at the detector or control panel to limit the effect of radio frequency interference and to maintain electrical safety Note The junction box for the Flamgard Plus is manufactured from marine grade alloy and has a powder coated finish Care should be taken during installation to p
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8. at the detector taking into account the voltage drop due to cable resistance For example a nominal dc supply at the control panel of 24 V has a guaranteed minimum supply of 20 V The maximum voltage drop allowed is therefore 8 V Flamgard Plus can demand up to 210 mA and so the maximum loop resistance allowed is 38 Ohms A 1 5 mm cable will typically allow cable runs up to 1500m 1 3 Status Indication Flamgard Plus includes a local display and status LED visible through the junction box window This is shown in Diagram 1 The display shows the current flammable gas concentration in the range 0 100 LEL and current mode of operation ie NORMAL ZERO or CAL The LED shows the current alarm state of the detector This is Summarised in Table 1 Operational LED 4 20mA Relay Comment state indication outputs states Normal Steady green 4 to 7 2mA AL1 Off O to 20 LEL operation Wi AL2 Off FAULT On Normal Steady red 7 2 to 10 4mA ALI On 20 to 40 LEL operation AL2 Off Alarm 1 FAULT On Normal Flashing red 10 4 to 20mA AL1 On operation Ru AL2 On Alarm 2 FAULT On Over range Flashing red 24mA clamp AL1 On gt 100 LEL AL2 On Display back FAULT On light flashes Zero calibration Flashing green Configuration Configuration Latched until 40 to 100 LEL mode dependent dependent reset via MENU see section 2 see section 2 Detector Steady amber OmA AL1 Off fault AL2 Off FAULT
9. L TERMINAL LAYOUT E ALARM RELAY VERSION ONLY Diagram 2 Terminal and amplifier layouts e Consider the process conditions Butane for instance is normally heavier than air but if released from a process line which is at an elevated temperature and or under pressure the gas may rise rather than fall The placement of detectors should be determined following advice of experts having specialist knowledge of gas dispersion the plant processing equipment as well as safety and engineering issues The agreement reached on the locations of sensors should be recorded Crowcon would be pleased to assist in the selection and siting of gas detectors 3 2 Mounting The mounting detail of Flamgard Plus is given in Diagram 1 Flamgard Plus should be installed at the designated location with the detector pointing down This ensures that dust or water will not collect on the sinter and stop gas entering the detector 3 3 Cabling requirement Cabling to Flamgard Plus must be in accordance with the recognised standards of the appropriate authority in the country concerned and meet the electrical requirements of the detector Crowcon recommend the use of steel wire armoured SWA cable and suitable explosion proof glands must be used Alternative cabling techniques such as steel conduit may be acceptable provided appropriate standards are met Flamgard Plus requires a dc supply of 12 30 V at up to 210 mA Ensure the minimum dc supply of 12 V is observed
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14. cal connections are made via the terminal board mounted in the base of the junction box see Diagram 2 Optional alarm relays AL1 amp AL2 and one fault relay FAULT are mounted on the terminal board which may be used to drive local warning devices or connect Flamgard Plus to a control panel 2 DETECTOR CONFIGURATION 2 1 Standard configuration As standard Flamgard Plus is factory set as follows Current source with 0 mA Fault 2 mA Inhibit ie Zero Cal mode 4 20 mA Normal operation 24mA Over range clamp AL1 relay Alarm level 1 set to 20 LEL Normally de energised energising on alarm Contact normally open NO closing on alarm AL2 relay Alarm level 2 set to 40 LEL Normally de energised energising on alarm Contact normally open NO closing on alarm FAULT relay Normally energised de energised on fault Contact normally closed NC opening on fault Alarm fault relays automatically reset when alarm or fault has cleared INHIBIT Normally selected ie when CAL ZERO selected current output is forced to 2mA and relays are held in normal no alarm state Location of links are shown in Diagram 2 2 2 4 20mA options To change current source output to sink set switch to SK position To change Inhibit from 2 mA to 4 mA fit link to 4 position 2 3 Relay options To change AL1 or AL2 relay from NO to NG fit link in the NC position To change FAULT relay from NC to NO fit link in the NO positio
15. n 2 4 Inhibit options To not inhibit 4 20 mA signal and relays fit link to N and link to 4 5 115 477 SET BRIDGE SET BALANCE UNITS E TAMPER PROOF M20 NTP POINTS A Ponts GRUB SCREW CANT 1 5mm ALLEN KEY CABLE ENTRY l LOCAL Z ERR Y M20 NTP STEADY ON S Se PRS CABLE ENTRY INDICATES N FLASHING ZEROICAL Flamgard Plus A INDICATES MODE a e 4 20mA RELAYS ACTIVATED HOD INHIBITED m z O ZERO O INHIBIT O N ALARM 1 amp 2 S 8 ADJUSTMENT a POTS STATUS LED DOWN UP tT EXTERNAL 4 OFF 6mm 14 83 3 HEIGHT 115 4 S a All dimmensions in mm unless otherwise stated Diagram 1 Flamgard Plus general arrangement 3 INSTALLATION WARNING Flamgard Plus is designed for use in Zone 1 and 2 hazardous areas and is certified EEx d IIC T6 AEx d IIC T6 in USA Installation must be in accordance with the recognised standards of the appropriate authority in the country concerned For more information contact Crowcon Prior to carrying out any work ensure local regulations and site procedures are followed 3 1 Location There are no rules which dictate the siting and location of detectors however considerable guidance is available from BS EN 50073 1999 British Standard Code of Practice for the Selection Installation Use and Maintenance of Apparatus for the Detection and Measurement of Combustible Gases or O
16. rotect the painted finish as use in saline environments could result in paint flaking off from damaged junction boxes This in no way compromises the performance of the detector as the marine grade alloy junction box is approved for use in offshore environments Sh OPA O V L ureu jOe UOD uodo ONdS ONdS A91 yne x uodo ONdS ONdS Shela wey X Z sindino sAejay e6uel 1940 WW pZ 131 001 0 yw O 7 uondo yw t 1Iqluu y z ney yw 0 Q IGe O9I9S YUIS JO MNOS YU Z Y nd no 10 99 0q LUNWUIXeLW yu 09 UOISI A BJ I uONJ LUNLUIXeLU yu OL Z uolsi A BJ tJ quand Bunei do OPAOS Z L o6e 0A Bunei do Oll gil VI sdnoib sey uol o s SUOITEOIISSE O Cale s s seae Z uoz JO uo7z ul SN JO p lJlU9O s uoz x 7 PIDGNCOS ON H39 S 91 Oll p XAV S S s uoz sselO IN 099 AD 91 Oll p xa Z II C jooudewue 4 uo1 09 01d UuoIsOo dxy s po jeaoiddy GOdI uono 1oiud ss 1pu 6uisu puoo uou HY 66 0 6 2GG Ol Age peu6 auueyy xoq uonounr o6uew Aypiuny o6ues aunyesodwey ja1S ss uie S o 6uisnou JOSUeS qH96 IPH 1E AI sql 8 BJ Z 1uBI A 2 0 X eV X 8 WU S X SLL x OOZ SUOISUSLUIG NOLLVOI3I93dS S eb Ajqwasse GH96 bp weibeig YSLNIS L8ZLOS ON Wed AIGWASSY 331NIS AQO NIV va JA3431S AVS gz PON ON Hed Z LAYSV9 ZGYYON ON Hed LJMSV9 INIJYdOIN YOLSITTAd dd YOSNAS 8 dVO dOl lt lt SM3M9S G
17. xygen In the USA refer to the National Electrical Code NEC 1999 Similar international codes of practice may be used where applicable In addition certain regulatory bodies publish specifications giving minimum gas detection requirements for specific applications The detector should be mounted where the gas is most likely to be present The following points should be noted when locating flammable gas detectors e To detect gases which are lighter than air eg methane detectors should be mounted at high level and Crowcon recommend the use of a collector cone Part No C01051 e To detect heavier than air gases eg butane detectors should be mounted at low level e When locating detectors consider the possible damage caused by natural events e g rain or flooding For detectors mounted outdoors Crowcon recommend the use of a Weatherproof Cap Part No C01442 e Consider ease of access for functional testing and servicing e Consider how the escaping gas may behave due to natural or forced air currents Mount detectors in ventilation ducts if appropriate REAR VIEW OF AMPLIFIER Ky CROWCON GAS RANGE C ALARM C oO m Z O s lt L SR OUTPUT OUTPUT OPTIONS 4mA O TEST POINT 40 200mV RELAY CONTACT ALARM 2 CONTACT REVERSING LINKS ALARM 1 FAULT ALARM SET POTS O OXYGEN fv SENSOR INTERNA
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