CROWCON FD-AC-13 Flame Detector Instruction Manual

CROWCON FD-AC-13 Flame Detector

Product Information

Specifications :

• Product Name: Crowcon FGard UV/IR

• Type: UV/IR Flame Detector

• Hardware Version: 1.0 and above

• Features: IR sensor, UV tube, digital signal processing
  hardware, firmware algorithms

• Approval: FM Approvals

• Operating Mode: Standalone

Product Usage Instructions

Safety Instructions:
For the correct and effective use of this equipment, it is essential to read and understand these instructions fully before installation, operation, or maintenance. Pay attention to all safety warnings and cautions.

Specific Conditions of Use :

• Follow National Electrical Code (NEC) for installations in North America; observe local regulations in other countries.
• Properly earth the equipment to protect against electrical shock and minimize interference.
• Avoid drilling holes in housing to maintain explosion protection.
• Ensure enclosure lid is fully tightened before energizing equipment.
• Avoid opening the enclosure in the presence of an explosive atmosphere.
• Follow permits, site procedures, and isolate power supply before opening the enclosure.
• Operators must be trained on actions to take in case of fire detection.
• Use cable with temperature rating greater than 25°C above maximum ambient temperature.

Maintenance and Commissioning:

• Procedure: Follow the maintenance guidelines provided in the manual for regular upkeep of the detector.
• Functional Testing: Perform functional tests as described to ensure proper operation.
• Fault Finding:
  Removal of the Electronics: Follow the instructions for safe removal of electronics if needed for maintenance or troubleshooting.

FAQ

• Q: What should I do if I encounter a false alarm?
  A: If you experience a false alarm, ensure there are no external factors triggering the detector. If the issue persists, contact technical support for assistance.

• Q: Can the detector be used in hazardous environments?
  A: The detector is designed for safe operation in hazardous environments but follow all safety precautions and guidelines provided in the manual.

Crowcon FGard UV/IR
UV/IR Flame Detector

Installation, Operating and Maintenance Instructions

• Flame detector UV/IR (FGard UV/IR) – FD-AC-13
• Issue 3 February 19th 2024

Introduction

This safety and technical manual applies to the Crowcon UV/IR Flame Detector (FGard UV/IR) hardware version 1.0 and above.
The Crowcon FGard UV/IR uses two sensors, one IR sensor and one UV tube, digital signal processing hardware and firmware algorithms to interpret the radiant characteristics of flame.
FM Approvals ensures that our flame detection firmware and hardware is fit for purpose through rigorous research and testing to a range of fire types and various potential false alarm stimuli. This testing proves that the FGard UV/IR has an unsurpassed false alarm immunity.
The FGard UV/IR has been designed for use in standalone operation.

Detector Features

• The FGard UV/IR has a 100° horizontal and 80°vertical cone of vision with a range of 39 metres to a 0.1m2 pan fire of n-heptane.
• Three detection sensitivity settings allowing the user to select the sensitivity that is most suitable for their application.
• Superior false alarm immunity to common sources of unwanted alarms such as hot process and hot work.
• Advanced optical verification test assuring readiness to perform when needed.
• Outputs include both relay contacts and 0-20mA.
• Separate termination chamber for ease of installation.
• Certified Flame Simulator FGard SIM verifies operation from distances of 3 to 8 metres.
• FGard UV/IR can operate via a standard 3 or 4 wire termination.
• Microprocessor controlled heated optics increases resistance to moisture and ice.

Safety Instructions

For the correct and effective use of this equipment, to maintain safety and avoid hazards it is essential that you read and understand these instructions fully and act accordingly BEFORE installing, operating, or maintaining the equipment.
PAY ATTENTION TO ALL SAFETY WARNINGS AND CAUTIONS

1. Specific conditions of use

   • This equipment is certified and intended for use in potentially hazardous areas. Install and use the equipment in accordance with the latest regulations. The end user shall close any unused entries using suitably certified blanking elements to maintain the housing’s type of protection.
     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 UV/IR type flame detector; Crowcon FGard UV/IR, 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.

   • The equipment must be properly earthed to protect against electrical shock and minimise electrical interference.

   • Do not drill holes in any housing or enclosure as this will invalidate the explosion protection. Ensure that the enclosure lid is fully tightened and locked into position before energising the equipment.

   • Do not open the enclosure in the presence of an explosive atmosphere.

   • All permits and proper site procedure and practices must be followed, and the equipment must be isolated from the power supply before opening the enclosure in the field.

   • Operators must be properly trained and aware of what actions to take in the event of a fire being detected.

   • Cable to be used for installation is to be selected with a temperature rating of greater than 25 degrees Celsius above the maximum ambient temperature. The metric cable entries are fitted with an internal stop. This will result in threads of the cable gland being visible. Do not over tighten.

2. Cautions

   • Use only approved parts and accessories with this equipment.
   • Do not attempt to replace the window as the sapphire and the front cover are individually matched pairs to meet the stringent requirement of the hazardous area certification.
   • The threaded portions of the detector are flame paths. These threads and the flame paths are not to be repaired.
   • To maintain safety standards, commissioning and regular maintenance should be performed by a qualified person.

3. Important Safety Notices

   • Pay attention to the guidelines given throughout this document.

   • If in any doubt about the instructions listed within this manual, then please contact Crowcon. Crowcon takes no responsibility for installation and/or use of its equipment if it is not in accordance with the appropriate issue and/or amendment of the manual. Crowcon reserve the right to change or revise the information contained herein without notice and without obligation to notify any person or organisation of such action.

   • Only those parameters and configurations highlighted with the FM diamond have been tested and approved by Factory Mutual.

   • Warning
     Do not open the detector assembly in a hazardous area. The detector contains limited serviceable components and should only be opened by trained personnel.

   • Caution
     The wiring procedures in this manual are intended to ensure functionality of the device under normal conditions. Due to the many variations in wiring codes and regulations, total compliance to these ordinances cannot be guaranteed. Be certain that all wiring complies with all local ordinances. If in doubt, consult the authority having jurisdiction before wiring the system. Installation must be done by trained personnel.

   • Caution
     To prevent unwanted actuation or alarm, extinguishing devices must be inhibited/isolated prior to performance testing or maintenance.

   • Detector Orientation

   • Detectors should be mounted with the earth stud directly below the lens.

   • Detector Positioning

   • Detectors should be positioned to provide the best unobstructed view of the area to be protected.

   • The following factors should also be taken into consideration:

   • Identify all high-risk fire ignition sources. Ensure that enough detectors are used to adequately cover the hazardous area.

   • Locate and position the detector so that the fire hazard(s) are within both the field of view and detection range of the device.

   • For best performance, the detector should be mounted on a rigid surface in a low vibration area.

   • Extremely dense fog or blizzard conditions could eventually block the vision of the detector.

   • For indoor applications, if dense smoke is expected to accumulate at the onset of a fire, mount the detector on a side wall (approximately 1 to 2 metres) below the ceiling.

   • The FGard UV/IR has three sensitivity settings, which may be changed via a Crowcon application.

   • The flame detector carries out continuous internal hardware diagnostic testing to ensure correct operation is relayed to the control system.

   • The FGard UV/IR 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.

4. EN 54-part 10 Limitation of use

   • The FGard UV/IR is not approved for use in oxygen-enriched atmospheres.
   • As the FGard UV/IR 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.
   • As the FGard UV/IR responds to CO2 emissions of a flame the FGard UV/IR cannot detect non-hydrocarbon fires, such as those using pure hydrogen, silane, and sulphur as fuel.
   • The sensitivity of the FGard UV/IR is reduced by obscurants such as smoke, fog, and other airborne particulates. The FGard UV/IR may be blinded by extremely dense obscurants.
   • Arc welding should not take place within 10m of the FGard UV/IR when using the highest sensitivity setting.

Installation

The FGard UV/IR design has been developed to allow simple installation. The detector comprises two key components, the detector enclosure, and the detector internal assembly. The detector assembly located in the front of the enclosure should not be removed except by trained personnel. Unauthorised removal or disassembly of the detector assembly will invalidate the warranty. Only the rear end cap can be removed for terminal access.

1. Detector Enclosure
   The detector electronics are housed in an enclosure certified for use in hazardous areas. For the exact certification and conditions of use see certification label on the device, or the example drawing below:

   • The detector comprises the front window cover including the window, the rear enclosure cover, the enclosure body, certification rating label (see above) and the mounting bracket.
     The flame detector is supplied preassembled and includes the mounting bracket. However, it is not supplied with a mounting support and fixings, cabling, or glands.

2. Mounting & Orientation

   • The mounting bracket allows the detector’s vertical orientation to be adjusted from 0 to 45° and allows a horizontal rotation of +/-45° when mounted from above.
   • Figure 1: Detector Mounting Bracket
   • 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.

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.
   • Figure 4: Terminal Schematic
   • The detector has two types of alarm output available simultaneously.
   • 0-20mA (source non-isolated)
   • Relay (Alarm & Fault)
   • Listed below are wiring options dependent on the functional requirements of the detector.

4.  0-20mA Output

   • The following wiring connection diagram shows correct wiring of the detector when a 0-20mA output is required.
   • Figure 5: 3 Wire Termination

Factory Fixed Values

Notes:

• Note 1 – The tolerance on the above outputs is +/- 0.3mA current with a maximum loop resistance of 500 ohms.
• Note 2 – Additional 0-20mA values are configurable and must be specified when ordering if required. The optical fault signal may be configured at 2mA as opposed to 1.5mA and the alarm signal may be increased to 20mA.
• Note 3 – The FGard UV/IR 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. If the 20mA alarm signal is delayed, it is considered an Aux alarm level.
• Note 4 – The 0-20mA signal has HART ® 7 protocol superimposed on top of it to give access to more diagnostic information. See HART ® 7 Technical Note.

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.
• Figure 6: Relay Configuration Termination

NOTE : EOL and alarm resistors values are defined by the client and the control system/fire panel which the detectors are being integrated into.

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 UV/IR Internal Inter-connections

Installation Checklist
Experience has shown that poor installation and commissioning practice may result in an unreliable fire detection system that fails to meet the site performance targets. Before installing the detector, it is important to consider where it is to be located and how it is to be mounted. To maintain compliance with the EMC regulations it is essential the electrical installation be engineered correctly.

Mechanical

Notes| When locating the detector consideration should be given to maintenance access to the detector. The detector mounting should be secure and vibration free.

It is advisable to check the detection locations, prior to fabrication of the mounting supports, as changes are frequently made during construction at site which can affect detector coverage.

The installation should allow space for subsequent detector removal, for maintenance or repair, to be easily achieved.

---|---
1| The detector should be fixed to a stable supporting structure using the mounting bracket provided. 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.

2| 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.

3| The detector electronics shall be protected from mechanical damage and external sources of EMI such as X-rays, RFI and electrostatic discharge. The detector should not face directly towards the sun.
4| Fit the mounting bracket to the support structure using 8mm bolts (not provided). The

detector (bracket) should be oriented to provide the desired coverage.

---|---
5| The detector enclosure body should be fitted to the mounting bracket. The bolts locate into the bracket. Twist the enclosure to locate the bolts; these are then tightened using a 6mm Allen key.
6| Ensure the detector is orientated such that the earthing stud is directly beneath the lens.
7| Glanding should be carried out by trained personnel. The gland should be fitted in line with installation standards for potentially explosive atmospheres that is 5 full threads minimum with the IP seal washer fitted at the bottom of the thread. This sealing arrangement will result in several threads of the cable gland being visible. The gland should be torqued between 15 to 20 N m (11 to 15 lb ft).

Note – The IP seal washer only applies to metric threads.

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. The detector requires a clear unobstructed view of the local hazard. To avoid local obstructions, such as pipework and cable trays, a 2m helix should be allowed in the detector cabling. The detector should only be fitted just prior to commissioning the detector. Experience shows that the detector can be damaged due to

cable testing operations (Insulation Tests, etc.).

---|---
1| Isolate all associated power supplies. Ensure that they remain OFF until required for commissioning.
2| 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.

3| The electronics subassembly shall be protected from mechanical damage and external

sources of EMI such as X-rays, RFI and electrostatic discharge.

4| The enclosures external earth stud should be connected to a local earth point.
5| Remove the transit plug(s) from the enclosure body gland entries.
6| Fit approved cable glands.

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.

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.

2. Cable Selection

   • Cable to be used for installation is to be selected with a temperature rating of greater than 25 degrees Celsius above the maximum ambient temperature.
   • The metric cable entries are fitted with an internal stop. This internal stop has an IP washer mounted directly above it. Ensure this is fitted to maintain the ingress protection. This will result in threads of the cable gland being visible. Do not over tighten.
   • The installation and local regulations and standards determine the overall cable specification. This section specifies suitable cable characteristics to ensure correct operation of the flame detector.

3. DC Power

   • NOTE: Table 2 shows an absolute maximum for cable length; try not to approach this value.
   • DO NOT ground any cable shields at the detector housing.

Table 2: Maximum Cable Lengths (24Vdc supply)

Installation based on 24V nominal supply| Number of Flame Detectors| Maximum Power (W)| Maximum Cable Length (m) with 1.5mm2 Conductors

(12Ω/km)

| Maximum Cable Length (m)with 2.5mm2 Conductors

(7.6Ω/km)

---|---|---|---|---
Heater on| 1| 12W @ 24Vdc| 500| 780
Heater off| 1| 3W @ 24Vdc| 2000| 3000

Table 3: AWG Conversions

Cross Sectional Area (mm2)| American Wire Gauge (AWG)| Typical Conductor Resistance per km (3280 ft.) DC Ω/km @ 20°C (Approx.)
---|---|---
0.5| 22| 36
1.0| 18| 19
1.5| 16| 12
2.5| 14| 7.6

Application Guidelines

In considering the application of the detector it is important to know of any conditions that may prevent the detector from responding. The detector provides reliable response to hydrocarbon flames within its field of view, and insensitivity to common false alarm sources. Solid obstructions or a direct view of intense light sources may result in a reduction in the coverage and/or a reduction in the detector sensitivity. Scaffolding or tarpaulins in the detector’s field of view may reduce coverage. Contamination of the detector window may result in a reduction in sensitivity.

The detector has a 90° conical field of view. The location and orientation of the detector in relation to the protected area determines the actual footprint. Achieving the desired coverage depends on congestion within the protected space, the location of the detector(s) and the distance of the detector from the hazard. It may be necessary to install more than one detector within an area to achieve adequate coverage.
The detector sensitivity, expressed as fire size at a distance, is determined by the radiant heat output of the fire. This is a function of the fuel source, how it is released and distance from the detector to the fire.
In common with other forms of flame detection the detector’s sensitivity is reduced and potentially blinded by dense obscurants such as smoke, fog, and other airborne particulates. The detector is insensitive to arc welding; however, this should not be conducted within 10m of the detector.

1. Positioning Requirements
   The following guidelines have been based on operational feedback, reflecting commonly experienced problems which can be traced to a failure to observe the following:

   • Ensure the mounting position is free from vibration or movement.
   • Prevent accidental knocking or forcing out of alignment.
   • Isolate as far as possible from local electrical interference sources.
   • Ensure sufficient detection to achieve adequate coverage for all likely hazards.
   • Minimise exposure to contamination of the detector face plate.
   • Ensure ease of maintenance access to detector (i.e., direct ladder or scaffold access).
   • Do not allow the FGard UV/IR to have direct view of hot surfaces.
   • Ensure that the FGard UV/IR has no direct view or reflected view of a friendly fire.
   • The detector should be aimed downward by at least 10° to 20°.
   • All these issues are of crucial importance to a successful installation and they should be afforded great attention during the detailed design, construction, and commissioning phases of the work.

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.
   • The cones of vision are detailed in Appendix C.

3. Exposure to Flare Radiation

   • Flame detectors are frequently used where hydrocarbon fire hazards are expected; these are quite often processing plants where a flare stack is in use nearby. The detector shall not have a direct view of the flare or a reflected view of the flare.

4. Optical Contamination

   • There are many sources of contamination such as oil, water (deluge water, rain, and sea-spray), snow, ice, and internal misting. Excessive contamination of the detector faceplate may result in an increased maintenance requirement and potentially reduce the detector’s sensitivity. Where detectors are mounted at low level, care should be taken to avoid contamination (such as water and oil) from equipment above the detector. Care should be taken in sighting the detector to minimise the likelihood of such contamination. The detector is designed such that an optical fault is generated when half of the detection range remains. This is indicated by the fault output and is evident by the yellow colour of the LED on the face of the detector. The optical fault condition indicates that the detector requires cleaning or service. The optical fault indication is self-clearing.

5. Enclosed Areas

   • In enclosed areas, if dense smoke is expected to accumulate at the onset of the fire, the detector should be mounted 1 to 2 metres below the ceiling level.
   • 5.6 Detector Sensitivity
   • The detector’s response to a fire is a function of the fuel source and how it is released, fire size and distance, orientation to the detector and local ambient conditions. The typical figures are based on in-house tests except when marked with the FM logo, these tests were conducted and certified by Factory Mutual. As with all tests the results must be interpreted according to the individual application considering all possible variables.
   • The detector sensitivity to different fuel sources is dependent on the radiant heat output of the flame and the detectors typical response is shown below (see table 4). The detector will only detect hydrocarbon fires.

6. Detector Alarm Delay
   The Detector 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. The 20mA alarm signal if delayed is considered an Aux alarm level.

Table 4: Typical FDS303 Response Characteristics High sensitivity. For all FM approved results see Appendix D

Maintenance and Commissioning

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.

Monthly
6 – 14| Specific inspection and maintenance of the detector enclosure.| 12 Monthly
16| Detector function testing.| 6 Monthly
1 – 5

15 – 17

| Commissioning Procedure.| Post Installation
Step| Activity| Key Points
1| Detectors that require maintenance / commissioning should be taken offline and inhibited. Detectors which require to be opened will need to be isolated electrically.| Ensure that panel wiring, and terminations associated with all units under test are in good order.
2| Ensure that the detector mounting arrangements are secure and undamaged.|
3| Ensure that the detector enclosure is intact and undamaged.|
4| Ensure that all associated cables and glands are correctly made up, secure and undamaged.|
5|

• Clean the enclosure faceplate (outside) with a mild detergent solution and a soft cloth until the window is clear of all contamination. Wash the window thoroughly with clean water and dry with a clean lint free cloth or tissue.
• Note: This MUST be carried out prior to initial powering of the device. The FGard UV/IR will carry out an automatic Optical Test Calibration at this point.

| Assess requirement for opening the enclosure, for maintenance or cleaning, follow steps 6 to 14.
6| Open the detector enclosure if required, by removing the enclosure cover. This exposes the enclosure flame path and detector lens.| Avoid damage to the flame path, faceplate, and lens.
7| Clean the enclosure cover and body flame paths with a dry clean cloth to remove and contamination. If the flame path or threads are badly pitted the components should be replaced.|
8| Check the ‘O’ ring seal on the enclosure cover is not damaged or perished, replace as required. Note the ingress protection is compromised if the seal is not correct.|

9

| Clean the enclosure faceplate (inside) with a mild detergent solution and a soft cloth until the window is clear of all contamination. Wash the window thoroughly with clean water and dry with a clean lint free cloth or tissue.|
10| Non–setting waterproof grease should be evenly applied to the flame path on both the enclosure cover and body.|
11| Clean the detector lens. This should be done with a soft, dry, and clean cloth.| Avoid touching the optics or electronics.
12| Clean the detector enclosure faceplate. Use a degreasing agent on the outside to remove deposits.|
13| The enclosure cover must be screwed on to a minimum of 5 full turns or until fully tight and secured using the locking screw provided.|
14| Reinstate the detector back into service.|
| |
---|---|---
15| Ensure that inhibits are applied, then, using the flame test torch, function test the detector. Note the detector LED indicator, within the detector housing, changes colour to RED. Check the mA output is indicating 18mA.| Check the complete display system for correct function and indication.
16| Isolate the power to the detector and ensure a fault is initiated within the control system. Check the Ma output is indicating 0mA.|
17| De-isolate the detector and ensure the status LED indicates green. Reinstate the detector back into service. Check the mA output is indicating 4mA.|

Functional Testing
The detector can be function tested using the FGard SIM Flame Simulator, which has been specifically designed to provide a convenient means of field testing the detector. Refer to the FGard SIM Flame Simulator user manual for instructions on its use.
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.
Detector/simulator returns along with a written statement describing any fault should be sent to the address listed below:

• Crowcon Detection Instruments Ltd. 172 Brook Drive,
• Milton Park,
• Abingdon,
• Oxfordshire,
• OX14 4SD,
• United Kingdom.

Fault Finding

1. Removal of the Electronics
   Warning there are no user replaceable parts within the electronic module. Any attempt to repair or dismantle the electronic sub-assemblies will void the warranty. 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.
   Removal of the electronics should only be performed by competent personnel. The following is the procedure for removal of the electronic module:

   •  Loosen the Allen screw that secures the lens cap to the housing
   • Un-screw the lens cap assembly and remove.
   • Gently un-screw the three screws indicated until they freely turn. Please note these screws are not removable.
   • Grasp the two screws positioned at the bottom of the detector and pull the electronics module out of its housing.

2. Replacement of the Electronics
   The following is the procedure for installation of the electronic module:

   • Insert the electronic module with the centre sensor positioned at the top of the housing.
   • Rotate the module clockwise and anti-clockwise until the locating pins click into position.
   • Push the electronics assembly into the housing until the face plate is flush with the front of the housing. Note: This should take minimum force if the locating pins are in position.
   • Gently screw the three screws until they bottom. Note: Do not over tighten.
   • Grease and replace the lens cap.
   • Tighten the lens cap Allen locking screw.

3. Diagnostics
   It is impossible to provide fault diagnostics for every possible detector fault. In all cases it is advised that the following best practice is followed:

   • Only make one change at a time (changing more than one thing makes diagnosis very difficult).
   • Check the most obvious possible cause first.
   • Work systematically through the problem.
   • Keep good notes on the original problem, each step taken, and the results observed.

4. LED Indication
   The detector LED indicator is used to reveal the detectors current state, as shown below: Figure 9: FGard UV/IR Fascia – Status LED

Table 5: LED Status Diagnostic Chart

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.

Technical Specification

Detector Information

Electrical Specification

Mechanical Specification

request

Terminal Wire Size| mm2| 2.5|
Ingress Protection| | IP66 (NEMA 4X)|
Mounting Bracket| | See figure 1 Mounting Bracket Page 9|
Support Fixings| mm| 2 x M8|
Vertical Adjustment| Degrees| 0 to 45|
Horizontal Adjustment| Degrees| 0| Provided by support
Axial (horizontal) Rotation| Degrees| +/- 45|

Environmental Specification

Certification and Approvals

FM21ATEX0059X
Area Certification Hazardous| NEC 505| Class1 Zone 1 AEx db IIC T4| FM24US0003X
Hazardous Area Certification| NEC 500| Class 1 Div 1, Groups B, C, D T4| FM24US0003X
Hazardous Area Certification| IECEx| Ex II 2 G Ex db II C T4Gb IP66| IECEx FMG 23.0037X
American Fire Service Listing| FM| Class 3260, 3615, 3600|
European Fire Services Listing| FM| EN 54 Part 10 2002| 2809-CPR-E0035
CE Marked (Emissions)| | EN61000-6-3:2007A1:2011|
CE Marked (Immunity)| FM| EN50130-4 2011 A1:2014|
IEC 61508| | SIL 2 Capable|
Hazardous Area Certification| | Ex db IIC T4 Gb Ta|
Hazardous Area Certification| | Ex db IIC T4|

Note – Certificate numbers are subject to change.
Operating Specification

latched until the power is removed from detector.

Advanced Optical Verification| Yes – no mirror continuous automatic optical verification
Heated Optics| Yes – microprocessor controlled
LED Status| Tri-state LED – Green HEALTHY; Amber FAULT; Red ALARM
Output Options| 0(4)-20mA, HART® 7, Relay contacts – alarm and fault
Relay| 2 Relay Contacts – Alarm and Fault. SPST, 2A @ 30Vdc
Communication/ Configuration| RS485 and HART® 7

FGard UV/IR Detector Ordering Information

Note – additional cable entry variants are available upon request.
Detector Accessories and Spares

Appendix A – Acronyms, Terms & Abbreviations

Appendix B – Help us to help you.

• TO: QA Department
• Crowcon Detection Instruments Ltd. 172 Brook Drive,
• Milton Park, Abingdon, Oxfordshire, OX14 4SD,
• United Kingdom. sales@crowcon.com

| From: Tel: Fax: Email:
---|---
I suggest the following corrections/changes be made to Section ……………
Marked up copies attached (as appropriate):       Yes/No
Please inform me of the outcome of this change:               Yes/No

• For Crowcon
• Action by: __ Date:
• Response:
• Date: __

Appendix C – Field of View

Horizontal field of view to a 0.1 m2 N-heptane pan fire with an alarm response at high, standard, and low sensitivity.
100% = 39 or 25 or 17.5 metres.

Vertical Field of view to a 0.1 m2 N-heptane pan fire with an alarm response at high, standard, and low sensitivity.
100%= 39 metres or 25 or 17.5 metres.

Appendix D – FM Approval Performance Report
Alarm response to various stimuli.

Stimuli| Low Alarm Distance| Standard Alarm Distance| High Alarm Distance
---|---|---|---
N-heptane 0.1m2 pan fire| 17.5 m| 25 m| 39 m
Ethanol 0.1m2 pan fire| 12.5 m| 17.5 m| 30 m
Methane 1m plume fire| 17.5 m| 25 m| 37 m
100W incandescent Lamp steady state| No Alarm 2m| No Alarm 2m| No Alarm 2m
100W incandescent Lamp modulated| No Alarm 2m| No Alarm 2m| No Alarm 2m
Two 40W Fluorescent lamps steady state| No Alarm 2m| No Alarm 2m| No Alarm 2m
Two 40W Fluorescent lamps modulated| No Alarm 2m| No Alarm 2m| No Alarm 2m
500W Quartz Halogen lamp steady state| No Alarm 2m| No Alarm 2m| No Alarm 2m
500W Quartz Halogen lamp modulated| No Alarm 2m| No Alarm 2m| No Alarm 2m
190 Amp Electric arc welding| No Alarm 8.5m| No Alarm 5m| No Alarm 19m
1500W electric heater steady state| No Alarm 2m| No Alarm 2m| No Alarm 2m
1500W electric heater modulated| No Alarm 2m| No Alarm 2m| No Alarm 2m
Reflected Sunlight| No Alarm| No Alarm| No Alarm
Reflected modulated Sunlight| No Alarm| No Alarm| No Alarm

Low sensitivity response to N-heptane 0.1m2 pan fire in the presence of false alarm stimuli.

Standard sensitivity response to N-heptane 0.1m2 pan fire in the presents of false alarm stimuli.

High Sensitivity response to N-heptane 0.1m2 pan fire in the presence of false alarm stimuli.

• UK Office
  • Crowcon Detection Instruments Ltd 172 Brook Drive, Milton Park, Abingdon Oxfordshire OX14 4SD
  • Tel: +44 (0) 1235 557700
  • Fax: +44 (0) 1235 557749
  • Email: sales@crowcon.com
  • Website: www.crowcon.com
• USA Office
  • Crowcon Detection Instruments Ltd 1455 Jamike Ave, Suite 100 Erlanger KY 41018
  • Tel: +1 859 957 1039 or 1 800 527 6926
  • Fax: +1 859 957 1044
  • Email: salesusa@crowcon.com
  • Website: www.crowcon.com
• Netherlands Office
  • Crowcon Detection Instruments Ltd Vlambloem 129 3068JG, Rotterdam Netherlands
  • Tel: + 31 10 421 1232
  • Fax: + 31 10 421 0542
  • Email: eu@crowcon.com
  • Website: www.crowcon.com
• Singapore Office Crowcon Detection Instruments Ltd Block 194, Pandan Loop #06-20 Pantech Industrial Complex Singapore 128383
  • Tel: + 65 6745 2936 Fax: +65 6745 0467
  • Email: sales@crowcon.com.sg
  • Website: www.crowcon.com
• China Office
  • Crowcon Detection Instruments Ltd (Beijing) Unit 316, Area 1, Tower B, Chuangxin Building 12 Hongda North Road, Beijing Economic Technological Development Area Beijing, China 100176
  • Tel: +86 10 6787 0335 Fax: +86 10 6787 4879
  • Email: saleschina@crowcon.cn
  • Website: www.crowcon.com

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>