Product Core Brief

• Model: 45UV5-1101
• Brand: Fireye (US leading combustion flame safeguard manufacturer, Emerson combustion control brand)
• Series: 45UV5 self-checking UV flame scanner series
• Model Key Distinction:45UV5 = Self-checking UV flame scanner with internal electromagnetic shutter-1101 = Equipped with BSP hinged mounting flange (differentiated from NPT flange 45UV5-1000)
• Core Function: Industrial self-verifying ultraviolet flame scanner, detects UV-C radiation from gas/oil burner flames, cooperates with Fireye BurnerLogix / MicroM / 25SU5 flame safeguard controllers to realize flame presence monitoring, flame failure safety trip, automatic self-diagnosis to eliminate false alarm risks, fully compliant with NFPA boiler combustion safety standardsManualsLib.
• Product Type: Complete flame scanner assembly (die-cast aluminum housing + quartz convex lens + built-in self-test shutter + BSP hinged mount + purge air port + electrical terminal compartment)
• Key Specs: 185–260nm UV-C spectral response (ignores visible/infrared heat radiation); built-in self-check electromagnetic shutter; BSP threaded mounting flange; 3/8″ purge air inlet; 4VA AC power draw; IP66/NEMA4X sealed housing; effective detection distance up to 1.83mNote: Mature industrial legacy model, available as brand new surplus; only compatible with Fireye dedicated flame safeguard controllers, cannot directly match third-party burner control systems without Fireye official approvalManualsLib.

 

Key Technical Specifications

 

Optical & Flame Detection Performance

• Spectral response: 185 ~ 260nm UV-C band, no response to sunlight, furnace heat infrared, visible light, effectively avoids light interference false alarms
• Sensing core: Sealed gas-filled UV avalanche tube, convex quartz lens boosts sensitivity by 400%
• Field of view: 90° conical viewing angle, 1 inch target coverage per foot distance
• Max effective detection range: 1.83m (72 inches) from scanner lens to flame core
• Sensitivity: 0.2 mW/cm² UV threshold
• Response time: < 2 seconds flame loss detection
• Supported fuels: Natural gas, propane, methane, coke oven gas, kerosene, diesel, light fuel oil
• Self-check mechanism: Built-in electromagnetic shutter periodically blocks UV optical path; controller judges scanner health via interrupted pulse signal, automatically reports scanner/lens fault

 

Mechanical & Mounting Parameters

• Housing material: Die-cast aluminum, oil-resistant high-temp silicone gaskets, fully sealed
• Mount flange: Hinged BSP threaded flange (unique feature of -1101, 45UV5-1000 uses NPT flange)
• Sight pipe connection: 1″ BSP female thread
• Purge air inlet: 3/8″ NPT threaded port for cooling & lens anti-fouling purge air
• Purge air requirement: Standard 4 SCFM (113 L/min) @4″ water column furnace backpressure; dirty fuel/high temp environments require up to 15 SCFM
• Electrical wiring port: 1/2″ 14 NPSM conduit tapping
• Overall dimensions: 216mm L × 102mm W × 102mm H
• Net weight: 1.7kg (3.75 lbs)
• IP/NEMA rating: IP66 / NEMA 4X dust/water/oil splash resistant

 

Electrical & Power Specifications

• Power consumption: 4 VA AC, powered exclusively by matched Fireye flame safeguard controller
• Operating frequency: Must match control system power frequency (50Hz / 60Hz)
• Signal output: Two-wire pulsed UV flame signal, periodically interrupted by self-check shutter
• Load requirement: Dedicated Fireye controller input circuit only

 

Environmental & Certification Limits

• Continuous operating temperature: -40°C ~ +93°C (-40°F ~ +200°F) housing surface
• Storage temperature: -40°C ~ +85°C
• Vibration resistance: Withstands boiler furnace continuous vibration without signal drift
• Hazardous certification: FM Class I Div 2 Groups A/B/C/D cabinet mounting certified, CE compliant

 

Matched Compatible Fireye Controllers

• BurnerLogix series, MicroM (E1101), 25SU5 flame safeguard control, FlameWorx, D-Series burner management systemsManualsLib

 

Product Introduction

The FIREYE 45UV5-1101 self-check UV flame scanner is a mainstream safety monitoring device for industrial boilers, thermal oil furnaces, process heaters and refinery process burners. Its core advantage is the built-in automatic self-test shutter, solving the hidden danger of conventional UV scanners failing to report lens fouling, tube burnout or wiring open circuit, greatly improving combustion safety.The -1101 variant adopts BSP standard threaded mounting flange, suitable for European standard furnace sight pipe installation; the hinged quick-release design allows opening the scanner housing without fully removing the mounting base, convenient for daily quartz lens cleaning maintenance. The 3/8″ purge air interface continuously delivers clean cooling air to blow away oil mist, dust and flue ash on the lens surface, preventing sensitivity attenuation from contamination in long-term operation.The UV detection principle only responds to high-energy ultraviolet radiation generated by fuel combustion; furnace wall high-temperature infrared heat and workshop ambient visible light will not trigger false flame signals. When the flame extinguishes unexpectedly, the scanner loses UV pulse output, and the matched Fireye controller immediately cuts off fuel supply and triggers safety interlock shutdown, complying with global boiler flame failure protection safety codes.Typical application scenarios: Power plant auxiliary boilers, chemical plant process heating furnaces, refinery hydrogen reformer burners, food processing hot air ovens, textile printing and dyeing thermal oil furnaces.

 

QA & Testing SOP (Transparency Building)

1. Incoming Inspection: Verify model 45UV5-1101 BSP flange marking; inspect quartz lens for scratches, aluminum housing crack, shutter mechanical jamming, gasket aging; check original factory anti-static packaging and product bulletin CU-22 documentation integrity.
2. Live Bench Functional Test: Connect matched Fireye 25SU5 controller with 120V/240V AC power supply; simulate UV flame signal source, run 24-hour continuous self-check shutter cycle test, verify normal flame pulse output, flame loss fast response and scanner fault self-report function.
3. Purge Air & Sealing Test: Supply rated 4SCFM clean dry air to purge port, inspect housing sealing for air leakage; test high/low temperature cycling to confirm no lens fogging or signal drift.
4. Configuration Record Backup: Record compatible controller wiring pin definition, purge air pressure standard and installation sight pipe length limit for field maintenance reference.
5. Final QC Packaging: Attach serialized printed test pass tag with self-check shutter and flame response test data; wrap scanner with anti-dust foam, seal in static-shielded bag to protect quartz lens during transit and storage.

 

Installation Pitfalls & 4-Step Replacement Guide

❗ Flange Matching Risk: 45UV5-1101 uses BSP thread flange, cannot directly install on NPT sight pipes; mismatched thread causes air leakage, purge air failure and lens fouling.❗ Purge Air Misoperation Risk: No continuous dry clean purge air will lead to rapid lens oil ash contamination, UV signal attenuation and frequent flame loss false trips; air source must be oil-free and dust-filtered compressed air.❗ Sight Pipe Alignment Risk: The scanner sight line must intersect the burner flame root (highest UV radiation area); aiming at secondary air or furnace wall without flame core will result in weak UV signal and unstable flame indication.❗ Frequency Matching Risk: Scanner AC operating frequency must be consistent with the matched Fireye controller power supply; mismatched 50/60Hz frequency leads to abnormal self-check shutter operation and flame signal loss.❗ High Temp Damage Risk: Do not exceed +93°C continuous housing temperature; long-term over-temperature burns internal UV tube and self-test shutter electromagnetic coil, causing permanent failure.

4-step replacement guide:

1. Pre-install LOTO: Cut off boiler main fuel supply, lock out burner management controller AC power; wait furnace body full cooling; attach grounding anti-static wrist strap, photograph original sight pipe mounting angle and purge air pipeline layout for reference.
2. Removal: Close purge air valve, disconnect purge air pipeline; loosen hinged flange fixing screws, detach 45UV5-1101 scanner from BSP sight pipe; disconnect two-core flame signal wiring from controller terminal block and label wire polarity.
3. Hardware Install: Align new 45UV5-1101 BSP flange with furnace sight pipe, adjust mounting angle to aim lens at burner flame root, fasten hinged flange lock screws; connect filtered dry purge air to 3/8″ inlet, adjust air flow to standard 4SCFM; rewire flame signal two-core cable to Fireye controller terminals following original polarity.
4. Power-on Validation: Restore controller AC power supply, ignite burner pilot/main flame; observe controller flame indicator steady ON; trigger self-check shutter cycle to confirm periodic signal interruption without flame fault alarm; cut off fuel to simulate flame loss, verify controller rapid fuel cut-off safety trip action within 2 seconds.

 

FAQ

Q: What is the difference between 45UV5-1101 and 45UV5-1000?A: Only the mounting flange thread standard differs:

• 45UV5-1101: BSP hinged flange, European standard furnace sight pipe matching
• 45UV5-1000: NPT threaded flange, North American standard boiler installationInternal UV detection circuit, self-check shutter and electrical parameters are fully identical.

Q: Can 45UV5-1101 work with Honeywell / Siemens burner controllers?A: Not supported natively. The self-check interrupted pulse signal protocol is exclusive to Fireye control systems; third-party controllers cannot identify the self-test shutter signal and will report persistent flame fault alarmsManualsLib.

Q: What failure signals will the built-in self-check shutter feed back to the controller?A: When the shutter blocks UV light periodically, the controller should detect flame signal interruption; if the signal remains continuous or completely disappears during shutter action, the controller judges scanner failure (UV tube burnout, lens full fouling, wiring open circuit) and triggers fault lockout.

Q: What warranty coverage applies to surplus new 45UV5-1101 scanners?A: Stocked brand-new units carry a 12-month functional warranty covering UV detection tube, self-check shutter electromagnetic coil, housing sealing and signal circuit defects. Damage caused by no purge air lens fouling, over-temperature operation, mismatched frequency power supply, reversed wiring or unfiltered oily purge air is excluded from warranty coverage.

Q: Is there a modern drop-in replacement for discontinued 45UV5 series?A: Fireye current YB110UVSC self-check UV scanner is the upgraded replacement, but mounting flange thread, wiring terminal definition and controller communication protocol are not fully compatible; sight pipe flange rework and controller parameter reconfiguration are required, no direct plug-and-play swap.

Q: Why can’t visible light / furnace heat infrared interfere with this UV scanner?A: The spectral response is limited to 185–260nm UV-C band; sunlight, furnace high-temperature infrared radiation and workshop lamp visible light do not contain energy in this waveband, so they cannot excite the UV tube to generate pulse signals, eliminating light source false alarm interference.