25SU3-5166D Fireye Flame Amplifier

Overview

The Fireye 25SU3-5166D is a professional-grade flame amplifier module designed for industrial burner management and flame safeguard applications. As part of the 25SU3 series, this high-discrimination analog amplifier is engineered to provide reliable ignition and flame failure protection by accurately distinguishing between target flames and background radiation. It is particularly effective in multi-burner environments where low scanner pulse ratios occur. The unit is comprised of several key components, including the 60-2203-2, 60-2207-2, 60-2301, and 60-2205 modules.

Features

• High discrimination (low sensitivity) circuitry to eliminate nuisance tripping from adjacent burners or background IR/UV.
• Dual-voltage compatibility supporting both 120 VAC and 230 VAC power supplies.
• Capability to monitor up to two flame scanners simultaneously.
• Repetitive self-checking functionality when used with compatible Fireye scanners.
• Selectable Flame Failure Response Time (FFRT) of 1, 2, or 3 seconds.
• Two independent gain settings for fine-tuning flame signal processing.
• 0-3 VDC flame signal strength test jacks for field diagnostics.
• Enhanced filtering technology to minimize false signals and improve safety integrity.

Specifications

• Supply Voltage: 120/230 VAC (+10%, -15%), 50/60 Hz.
• Power Consumption: 13 VA with one scanner; up to 20 VA with two scanners and a remote meter.
• Flame Relay Output: DPDT, 125 VA Pilot Duty at 230V.
• Operating Temperature: 32 degree F to 140 degree F (0 degree C to 60 degree C).
• Storage Temperature: -40 degree F to 185 degree F (-40 degree C to 85 degree C).
• Humidity: Maximum 85% relative humidity, non-condensing.
• Shipping Weight: Approximately 6 lbs (2.7 kg).
• Compatible Scanners: 45UV5, 45RM1, 45RM2, 45RM4, 45FS1, and 45UVFS1.

Applications

The 25SU3-5166D is ideal for industrial combustion systems requiring precise flame monitoring, such as power generation plants, pulp and paper mills, chemical processing facilities, and electric utility furnaces. It is used in supervised manual, semi-automatic, or fully automatic burner management systems to supervise burners firing natural gas, oil, pulverized coal, or combination fuels. It is specifically recommended for applications where the scanner pulse ratio from flame-on to flame-off is low (less than 3:1).