LG1093AA24 | Honeywell | LG1093 Flame Sensor

Honeywell LG1093AA24 Flame Sensor

Configured for flame presence detection in burner supervision loops, the Honeywell LG1093AA24 (LG1093 flame sensor) provides direct physical and optical execution within Honeywell combustion control panels. The device monitors flame intensity through its optical window and transfers the signal via a Teflon‑shielded cable routed through a one inch external conduit interface.

Hardware Specifications

4-20 mA HART Loop Protocol Behavior

Honeywell flame sensors commonly integrate into combustion management systems using standardized 4-20 mA loop signaling. The LG1093AA24 maintains stable loop continuity under high‑temperature conditions, with channel‑to‑channel isolation preventing interference when multiple sensors share a common panel interface. The optical window’s pressure rating supports continuous operation in elevated thermal zones, while the shielded cable minimizes noise ingress along long conduit runs.

Frequently Asked Questions

Q: Does the LG1093AA24 support hot‑swap replacement in a live control panel? A: The sensor can be replaced with power applied, but loop integrity must be maintained and the control panel must be in a safe state before disconnecting the cable.

Q: What considerations apply to backplane or controller loading when adding multiple LG1093 sensors? A: Each sensor contributes a standard 4-20 mA channel load; ensure the panel’s analog input card supports the cumulative loop current and isolation requirements.

Q: Are there firmware or configuration dependencies when integrating this sensor into Honeywell burner management systems? A: No firmware resides in the sensor itself; compatibility depends on the receiving controller’s analog input scaling and flame detection logic configuration.

Field Installation Guidelines

• Maintain proper engagement of the 3/4 inch internal NPT threads to ensure mechanical stability and prevent leakage around the optical window.
• Route the Teflon shielded cable through the one inch external conduit thread, ensuring the shield is grounded at the control panel end only to avoid ground loops.
• Avoid sharp bends in the cable, especially near high‑temperature zones, to preserve insulation integrity.
• Verify that the flame sensor’s optical window remains unobstructed and free of soot accumulation; periodic cleaning may be required depending on burner conditions.
• Ensure cable length selection (AAx4, AAx5, AAx6) matches the physical distance to the control panel to avoid unnecessary loop resistance.