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Summary of Contents for Crowcon FGard H2
- Page 1 Crowcon FGard H2 IR3 H Flame Detector Installation, Operating and Maintenance Instructions Flame detector IR3 (FGard H2) – FD-XX-XX...
- Page 2 Issue 1: November 2022 Issue 2: November 2023...
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Page 3: Table Of Contents
Contents Introduction ..............................5 Detector Features ..........................5 Safety Instructions ............................6 Specific conditions of use ........................6 Cautions ............................... 6 Important Safety Notices........................6 EN 54-part 10 Limitation of use ......................7 Installation ..............................8 Detector Enclosure ..........................8 Mounting &... - Page 4 Environmental Specification ......................25 Certification and Approvals ....................... 26 Operating Specification ........................26 FGard H2 Detector Ordering Information ..................27 Detector Accessories and Spares ...................... 27 Appendix A - Acronyms, Terms & Abbreviations ..................28 Appendix B - Help us to help you......................29 Appendix C - Field of View ........................
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Page 5: Introduction
The FGard H2 has been designed for use in standalone operation. 1.1 Detector Features • The FGard H2 has a 90° cone of vision with a range of 40 metres (131 ft) to a 0.9m (36 inch) plume of burning hydrogen. •... -
Page 6: Safety Instructions
For European (ATEX) installations IEC/EN60079-14 ‘Electrical Installations in Hazardous Areas’ and ICE/EN60079-17 ‘Inspection and Maintenance in Hazardous Areas’ should be strictly observed. The IR3 type flame detector; Crowcon FGard H2, is to be installed in places where there is a low risk of mechanical damage. -
Page 7: 54-Part 10 Limitation Of Use
The flame detector carries out continuous internal hardware diagnostic testing to ensure correct operation is relayed to the control system. The FGard H2 is not designed to annunciate diagnostic failure of signal returns via external wiring. Control systems and fire panels generally have fault monitoring for such an eventuality. -
Page 8: Installation
As the FGard H2 responds to flame, it cannot be used in locations where flare stacks are within its field of view or a reflected view is present without triggering alarms. The sensitivity of the FGard H2 is reduced by obscurants such as smoke, fog, and other airborne particulates. - Page 9 Figure 2: Ceiling Mount Figure 3: Wall Mount Firm, vibration free mountings are essential for trouble free operation of optical systems and the detector should be fixed to a rigid mounting. When mounting on a wall in this orientation allow for the cable gland and cable as this may restrict the downward rotation of the detector.
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Page 10: Wiring Procedure
3.3 Wiring Procedure The wiring terminals are in the rear section of the detector enclosure and are accessible by removal of the end cap. The front section of the enclosure should only be accessed by trained personnel. The terminal schematic detailed below shows the view looking inside the detector following removal of the end cap. -
Page 11: 0-20Ma Output
20mA. Note 3 - The FGard H2 can be factory-configured with an Aux alarm delay (20mA) of between 0 and 10 seconds in 1 second steps over and above the normal response times of the 18mA alarm signal. If the Aux alarm signal is delayed, the 18mA alarm signal will precede the 20mA signal giving the normal response times as tested by Factory Mutual to FM3260. -
Page 12: Relay Output
The following wiring connection diagrams shows wiring the detector when a relay output is required. Reversal of polarity across terminals 1 & 2 enables Crowcon RS485 communication on terminals 3 & 4. This communication protocol when used with Crowcon applications allows configuration changes to the detector. -
Page 13: Internal Inter-Connections
3.6 Internal Inter-connections The following diagram shows the internal inter-connections of the alarm and fault relay contacts and jumpers. Each field connection is listed on this diagram for clarity. Figure 7: FGard H2 Internal Inter-connections FGard H2 FGard H2 FGard H2... -
Page 14: Installation Checklist
The supporting structure must allow for horizontal adjustment of the detector orientation. The support structure should be in place prior to detector installation. Information on mounting is available from Crowcon. The threaded flame path of the enclosure cover and body must be protected from damage during installation. -
Page 15: Electrical
3.7.2 Electrical Notes It is advisable to check the detection locations, prior to fabrication of the mounting supports, as changes are frequently made during construction at site. Detector cabling must be segregated from cables carrying high-speed data or high energy and/or high frequency signals and other forms electrical interference. -
Page 16: System Design Guidelines
4 System Design Guidelines The following guidelines are intended to assist with the electrical design and engineering of systems where it is intended that flame detectors will be used. 4.1 Power Supply The detector requires an absolute minimum supply voltage of 18Vdc, as measured at the detector terminals. The system power supply voltage and power distribution should be arranged such that on the longest cable run the detector(s) has a supply voltage of greater than 18Vdc. -
Page 17: Application Guidelines
Do not allow the FGard H2 to have direct view of hot surfaces. • Ensure that the FGard H2 has no direct view or reflected view of a friendly fire. • The detector should be aimed downward by at least 10° to 20°. -
Page 18: Optical Contamination
18mA alarm signal will precede the 20mA signal giving the normal response times as tested by Factory Mutual to FM3260. The 20mA alarm signal if delayed is considered an Aux alarm level. Table 4: Typical FGard H2 Response Characteristics High sensitivity (40 metres). For all FM approved results see Appendix D... -
Page 19: Maintenance And Commissioning
6 Maintenance and Commissioning 6.1 Procedure This maintenance schedule/ commissioning procedure is intended for guidance only. The actual level of maintenance required will depend on the severity of the operating environment and the likelihood of damage or the rate of contamination from oil, sea spray, deluge system etc. It is advisable to regularly review maintenance reports and adapt the maintenance period to the operating environment. - Page 20 Note: This MUST be carried out prior to initial powering of the device. follow steps 6 to 14. The FGard H2 will carry out an automatic Optical Test Calibration at this point. Open the detector enclosure if required, by removing the enclosure cover.
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Page 21: Functional Testing
In the unlikely event of the detector failing to respond to the FGard SIM Flame Simulator please contact Crowcon (sales@crowcon.com). Please ensure that the flame detector and flame simulator are being used correctly in the first instance by referring to their manuals. -
Page 22: Fault Finding
If any fault is suspected within the electronics module the module is to be returned to Crowcon for investigation and repair if required. Any faults should be reported to Crowcon as per the instruction in section 6.2. -
Page 23: Led Indication
Steady OFF No Power/Major Internal Fault Steady Yellow Fault Alarm Two yellow flashes at start-up The FGard H2 is set to standard sensitivity (30 metres) Four yellow flashes at start-up The FGard H2 is set to high sensitivity (40 metres) -
Page 24: Power Fault
7.5 Power Fault If the detector LED indicator is OFF or flashing then there may be a power supply fault, as shown below: Figure 10: Power Supply Diagnostic Chart When investigating power supply faults, it is important to check that all voltages are within the detectors operating range (18V to 32V) under full load conditions as the voltages measured under no load conditions can be misleading. -
Page 25: Technical Specification
8 Technical Specification 8.1 Detector Information Parameter Value Model Crowcon IR3 flame detector FGard H2 Type Triple IR Hydrogen Flame Detector – IR3 Spectral Range Three wavelengths in the range of 2 µm to 3 µm Application Flame / fire detection of hydrogen and hydrocarbon fires 8.2 Electrical Specification... -
Page 26: Certification And Approvals
8.5 Certification and Approvals Parameter Authority/ Approval Certificate* Standard Hazardous Area Certification ATEX Ex II 2 G Ex db IIC T4 Gb IP67 Area Certification Hazardous NEC 505 Class1 Zone 1 AEx db IIC T4 Hazardous Area Certification NEC 500 Class 1 Div 1, Groups B, C, D T4 Hazardous Area Certification IECEx... -
Page 27: Fgard H2 Detector Ordering Information
Parameter Part Number Crowcon IR3 H2 flame detector - Stainless steel M25 Crowcon IR3 H2 flame detector - Stainless steel 3/4" NPT Crowcon IR3 H2 flame detector - Aluminium M25 Crowcon IR3 H2 flame detector - Aluminium 3/4" NPT Note – additional cable entry variants are available upon request. -
Page 28: Appendix A - Acronyms, Terms & Abbreviations
I or A Electrical Current or Ampere Junction Box Kilometre Kilo Watt Light Emitting Diode Crowcon (Engineering) Ltd Milli Henry – Inductance Meteorological Optical Range National Electrical Codes nF, pF Nano Farad, Pico Farad – Capacitance Personal Computer (IBM PC Compatible) R or Ω... -
Page 29: Appendix B - Help Us To Help You
10 Appendix B - Help us to help you. TO: QA Department From: Crowcon Detection Instruments Ltd. Tel: 172 Brook Drive, Fax: Milton Park, Abingdon, Email: Oxfordshire, OX14 4SD, United Kingdom. sales@crowcon.com I suggest the following corrections/changes be made to Section ……………... -
Page 30: Appendix C - Field Of View
Response: ________________________________________________________________ Date: ______________________ 11 Appendix C - Field of View Horizontal field of view to a 0.9m Hydrogen plume fire with an alarm response at high sensitivity. 100% = 40 metres Vertical Field of view to a 0.9m Hydrogen plume fire with an alarm response at high sensitivity. 100% = 40 metres. -
Page 31: Appendix D - Fm Approval Performance Report
12 Appendix D - FM Approval Performance Report Alarm response to various stimuli. Stimuli Standard Alarm High Alarm Distance Distance Hydrogen 36-inch plume fire 30 m 40 m Methylated Spirits 0.1m pan fire 15 m 20 m Methanol 0.1m pan fire 15 m 20 m N-heptane 0.1m... - Page 32 Standard Sensitivity response to a methylated spirit fire in the presence of false alarm stimuli False Alarm Stimuli Distance to False Distance to Fire Alarm 100W incandescent lamp steady state 15 m Alarm 100W incandescent lamp modulated 15 m Alarm Two 36W fluorescent lamps steady state 15 m Alarm Two 36W fluorescent lamps modulated...
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Page 33: Appendix E - Iec 61508 Failure Rate Data
The FGard H2 is classified as a Type B Element according to IEC 61508, having a hardware fault tolerance of 0. Therefore, based on the SFF of 94.83% a design can meet SIL 2 @ HFT=0 when the FGard H2 is used as the... -
Page 34: Appendix F - Sil 2 Exida Certification
Bypass the safety function and take appropriate action to avoid false trip. (Optional) Use RS485 communications to retrieve and diagnostics and take appropriate action. Use the test torch to force the FGard H2 into alarm state. Verify that LED, alarm relay/0-20mA outputs indicate alarm (as required) Wait for detector alarm signal to unlatch.
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