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Summary of Contents for Crowcon FGard IR3
- Page 1 Crowcon FGard IR3 IR3 Flame Detector Installation, Operating and Maintenance Instructions Flame detector IR3 (FGard IR3) – FD-AC-07 Issue 1: February 21...
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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 ........................... 8 Installation ....................................8 Detector Enclosure ................................8 Mounting &... - Page 4 Environmental Specification ............................25 Certification and Approvals ............................26 Operating Specification ..............................26 FGard IR3 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
This safety and technical manual applies to the Crowcon IR3 Flame Detector (FGard IR3) hardware version 1.0 and above. The Crowcon FGard IR3 is a (triple) IR flame detector. It uses three IR sensors, digital signal processing hardware and firmware algorithms to interpret the radiant characteristics of flame. -
Page 6: Safety Instructions
ICE/EN60079-17 ‘Inspection and Maintenance in Hazardous Areas’ should be strictly observed. The IR3 type flame detector; Crowcon FGard IR3, is to be installed in places where there is a low risk of mechanical damage. For installations in North America the National Electrical Code (NEC) should be strictly observed. In other countries the appropriate local or national regulations should be observed. - Page 7 The flame detector carries out continuous internal hardware diagnostic testing to ensure correct operation is relayed to the control system. The FGard IR3 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.
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Page 8: 54-Part 10 Limitation Of Use
The FGard IR3 is not approved for use in oxygen-enriched atmospheres. As the FGard IR3 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. - 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 IR3 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 IR3 Internal Inter-connections FGard IR3 FGard IR3 FGard IR3... -
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: System Design Guidelines
The threaded flame path of the enclosure cover and body must be protected from damage during installation. Any such damage can destroy the validity of the enclosure. The electronics subassembly shall be protected from mechanical damage and external sources of EMI such as X-rays, RFI and electrostatic discharge. The enclosures external earth stud should be connected to a local earth point. -
Page 16: Application Guidelines
Do not allow the FGard IR3 to have direct view of hot surfaces. • Ensure that the FGard IR3 has no direct view or reflected view of a friendly fire. • The detector should be aimed downward by at least 10° to 20°. -
Page 17: Detection Coverage
5.2 Detection Coverage Detector locations can be chosen from computer models or from site surveys. The detectors should be aligned to view the intended hazard considering any obstruction and congestion. Software analysis of the actual detector coverage may be required to ensure adequate coverage of the hazards. This analysis can also be used to optimise the number of detectors and the loop configuration. - Page 18 Table 4: Typical FGard IR3 Response Characteristics High sensitivity (60 metres). For all FM approved results see Appendix D Fuel Fire Size Distance Methane Fire 0.6m plume height 50m (165 feet) Ethanol Fire 0.3m x 0.3m pan 42m (136 feet) Diesel Fire 0.3m x 0.3m pan...
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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 cleaning, follow steps 6 the device. The FGard IR3 will carry out an automatic to 14. Optical Test Calibration at this point. Avoid damage to the...
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