Fireye 72DUVS4 UV Amplifier

Fireye 72DUVS4 Ultraviolet Self-Check Flame Amplifier

The Fireye 72DUVS4 is a high reliability, solid state plug-in ultraviolet (UV) flame amplifier module for continuous duty industrial and maritime burner management systems. It is designed to fit neatly into the Fireye D-Series burner control chassis (70D10, 70D20, 70D30, 70D40, 70D41, etc.) and interprets the signals received from the 45UV5 series self-checking scanners.

Combustion safety is the fundamental operational mission. The 72DUVS4 has an active self-checking feature that tells a mechanical scanner shutter to periodically disrupt the UV beam, dynamically monitoring the integrity of the internal UV phototube, amplification circuits and associated wiring. It removes misleading signals generated by component failure or internal short circuits and meets the most demanding safety requirements for unattended boiler rooms and sophisticated marine propulsion units.

Model Details

• Manufacturer: Fireye
• Series: D-Series Solid-State Burner Management
• MPN (Manufacturer Part Number): 72DUVS4
• Product Type: Ultraviolet Self-Check Flame Amplifier Module

Key Features

1. Dynamic Self-Checking Circuitry: Utilizes a shutter-based verification routine to continuously check for a “runaway” UV tube or component degradation during every burner cycle.
2. Solid-State Reliability: Engineered with ruggedized industrial solid-state electronics built to withstand heavy mechanical vibration and continuous thermal cycling onboard ships and heavy industrial plants.
3. Integrated Test Jacks: Features built-in front-panel meter test jacks allowing technicians to measure real-time DC flame signal microamps using a standard multimeter.
4. Plug-In Modular Design: Slide-in card architecture ensures fast replacement, minimal mean time to repair (MTTR), and reduced downtime during scheduled maintenance.
5. High Discrimination Profile: Tuned explicitly to the spectral response of the 45UV5 scanner to ignore background refractory glow and selectively detect hydrocarbon flame envelopes.

Compatible Equipment Models

• Scanner Models: Fireye 45UV5-1007, 45UV5-1008, 45UV5-1009
• Control Chassis / Bases: Fireye 70D10, 70D20, 70D30, 70D40, 70D41 Series
• Burner Systems: Fireye Series D40-41 Burner Management Systems

Applications

• Marine main propulsion boilers and auxiliary steam generators
• Industrial water-tube and fire-tube power boilers
• Petrochemical process heaters, thermal fluid heaters, and refinery furnaces
• Large commercial heating installations and multi-burner management setups

Expert Insight:

When troubleshooting flame signal dropouts on marine boilers utilizing the 72DUVS4, always check the quartz viewing window on the 45UV5 scanner first. Heavy fuel oil (HFO) soot, combustion particulate buildup, or moisture condensation inside the sighting tube will attenuate UV transmission and cause the amplifier module to trip.

Always connect your digital multimeter to the amplifier’s onboard test jacks during burner light-off. A stable DC signal reading (typically above 4 to 10 VDC depending on the system specs) guarantees proper alignment and shutter operation.

Never bypass the self-checking shutter mechanism. If the internal self-checking shutter fails to cycle, the 72DUVS4 safety lockout will safely prevent burner startup, protecting your asset from unmanaged fuel accumulation.

Frequently Asked Questions

What is the primary function of the Fireye 72DUVS4 amplifier?

The Fireye 72DUVS4 is a solid-state ultraviolet flame amplifier that processes flame signals from 45UV5 scanners and implements a safety self-check routine via a mechanical shutter to protect industrial and marine burners against flame failure.

Which flame scanners are compatible with the 72DUVS4?

This amplifier module is specifically designed to operate with Fireye 45UV5 series self-checking ultraviolet scanners, specifically models 45UV5-1007, 45UV5-1008, and 45UV5-1009.

How do I test the flame signal strength on this module?

You can easily check the live operational status by connecting a standard DC voltmeter into the positive and negative test jacks located directly on the front face of the 72DUVS4 amplifier module.

What is the Flame Failure Response Time (FFRT) for the 72DUVS4?

The standard FFRT for this unit is between 2 to 4 seconds, ensuring prompt fuel valve closure in the event of an unexpected burner flameout.