Fireye 95UVS2-1 InSight I UV Flame Scanner

Description

Key Technical Specifications

The published technical data identifies the 95UVS2-1 as a 24 VDC InSight UV scanner with integrated flame and fault relays, 4–20 mA output, display, and keypad.

Fireye currently identifies 95UVS2-1 as obsolete and recommends 95UVS4-1WINC as its replacement. The recommendation also applies to the 95UVS2-1 variants with the same basic model designation.

Product Introduction

The Fireye 95UVS2-1 is an InSight I Type 95 integrated ultraviolet flame scanner for continuous flame supervision in industrial burner and combustion systems. It uses solid-state UV detection and incorporates flame processing, adjustable flame thresholds, and an internal flame relay rather than requiring a separate remote flame amplifier.

The S2 configuration adds automatic selection of flame-modulation frequency and sensor gain during setup, with manual override capability. The unit provides a 4–20 mA flame-signal output, fault relay, local display, and keypad.

95UVS2-1

95UVS2-1

Installation & Configuration Guide

Stage 1: Pre-Installation Preparation

Estimated time: 20–30 minutes

⚠️ Safety First: This scanner is part of a combustion safety system. Shut down the burner, isolate fuel and electrical energy according to the plant’s approved LOTO procedure, and allow hot equipment to reach a safe working temperature.

Tools Required:

• ESD wrist strap
• CAT-rated multimeter
• Appropriate screwdriver/wrench
• Wire labels
• Smartphone/camera
• Fireye InSight documentation
• Correct mounting flange

Data Backup:

1. Record the complete 95UVS2-1 model number.
2. Photograph the scanner and mounting arrangement.
3. Record the scanner’s sighting angle.
4. Photograph the 12-pin connector wiring.
5. Record existing flame-signal values.
6. Record programmed flame settings and files where accessible.
7. Document the burner-management controller.
8. Record the existing scanner cable type and length.

⚠️ Do not substitute a 95UVS2-1 with another Type 95 scanner simply because the mechanical housing looks similar. UV, IR, and dual-sensor versions perform different detection functions.

Stage 2: Removing the Old Module

Estimated time: 15–20 minutes

1. Place the burner in the approved safe shutdown state.
2. Apply electrical and fuel-system LOTO.
3. Verify the scanner’s 24 VDC supply is isolated.
4. Allow the burner assembly to cool.
5. Photograph the scanner orientation.
6. Label the field wiring.
7. Disconnect the 12-pin connector.
8. Remove the scanner from its mounting flange.
9. Protect the optical window.
10. Inspect the sight pipe for soot, ash, or other deposits.

⚠️ Do not disturb the scanner alignment unnecessarily. Incorrect sighting can produce poor flame discrimination even when the replacement scanner is electrically healthy.

Stage 3: Installing the New Scanner

Estimated time: 15–25 minutes

1. Verify the replacement is 95UVS2-1.
2. Confirm the replacement is the same connection/configuration variant.
3. Inspect the optical window.
4. Verify the mounting flange.
5. Install the scanner in the original position.
6. Restore the original sighting angle.
7. Secure the scanner mechanically.
8. Reconnect the 12-pin connector.
9. Check cable shielding and grounding.
10. Verify the cooling-air arrangement where required.
11. Ensure the scanner is aimed at the intended flame envelope.

Self-Checklist:

• 95UVS2-1 verified
• 24 VDC supply confirmed
• 12-pin connector secured
• Correct flange installed
• Optical window clean
• Sight angle restored
• Shielding checked
• Cooling air verified

Stage 4: Power-On & Testing

Estimated time: 30–60 minutes

1. Verify all wiring against the Fireye schematic.
2. Restore 24 VDC power.
3. Confirm the scanner display initializes normally.
4. Check the fault status.
5. Start the approved burner ignition sequence.
6. Confirm the scanner detects flame at the expected point.
7. Allow the S2 setup/AutoTune procedure to establish appropriate flame discrimination.
8. Verify the flame signal.
9. Check the 4–20 mA output.
10. Verify flame and fault relay operation.
11. Perform the approved flame-failure test.
12. Confirm the burner-management system removes the fuel permissive when flame is lost.
13. Record final scanner settings and flame signal.
14. Return the burner to normal operation only after the complete safety loop passes testing.

⚠️ Never bypass the flame relay or burner-management interlock to test the scanner. A flame scanner is a combustion-safety component, not merely a process transmitter.

Frequently Asked Questions (FAQ)

What is Fireye 95UVS2-1?

The 95UVS2-1 is a Fireye InSight I Type 95 integrated UV flame scanner with a 12-pin quick-disconnect connection. It is designed to detect and supervise the presence or absence of a target burner flame.

What voltage does the 95UVS2-1 require?

The documented specification is 24 VDC, with a supply tolerance of +10% / -15% and approximately 0.35 A supply current.

Does the 95UVS2-1 need a separate flame amplifier?

No. The InSight Type 95 architecture incorporates flame processing and an internal flame relay. Fireye describes this as eliminating the need for a separate remote flame amplifier.

What does the S2 designation mean?

The S2 configuration provides automatic selection of the flame-modulation frequency and sensor gain during setup, while retaining manual override capability. It also provides expanded configuration and communications functions compared with the S1 configuration.

Is 95UVS2-1 obsolete?

Yes. Fireye identifies the 95UVS2-1 as obsolete and recommends 95UVS4-1WINC as the replacement. The manufacturer’s replacement table specifically maps 95UVS2-1 to 95UVS4-1WINC.

Is 95UVS4-1WINC a direct drop-in replacement?

It should not be assumed to be a mechanical and commissioning drop-in replacement without checking the existing installation. Fireye identifies it as the recommended replacement, but the mounting, wiring, configuration, burner-management interface, and commissioning procedure should still be verified against the applicable Fireye documentation.

Does the 95UVS2-1 include the mounting flange?

The scanner requires a separately ordered threaded mounting flange. Available specifications identify 1-inch NPT and 1-inch BSP mounting options, with cooling-air connections incorporated into the applicable flange assemblies.

What should procurement specify for a surplus 95UVS2-1?

Specify Fireye 95UVS2-1, the 12-pin quick-disconnect configuration, physical condition, display/keypad condition, optical-window condition, functional-test status, and warranty. Because Fireye has discontinued the model, also ask whether the unit is New Original/New Surplus, Used Tested, or Refurbished. Current secondary-market listings continue to identify the exact model, while Fireye’s own documentation directs buyers toward the 95UVS4-1WINC replacement.