This air duct smoke detector features a NEMA 4 watertight enclosure

As an OEM replacement relay

This black/white color-coded spring provides a precise outlet pressure range of 0

Complete Hardware Kit: Includes multiple mounting brackets and ceramic wire nuts to adapt to various burner box configurations

Installation Versatility: The removable mounting bracket attaches in three different configurations to fit cramped control panels

Lochinvar & A.O. Smith 100074673 Flame Rod R-410A This air duct smoke detectorThe Lochinvar and A. O. Smith 100074673 Flame Rod is a critical safety component designed for precise flame rectification sensing in high efficiency commercial boilers and water heaters. This OEM replacement part, formerly identified as Lochinvar PLT3022, monitors the burner's pilot or main flame by generating a microamp signal to the ignition control module. Engineered for compatibility with Lochinvar Knight, Armor, and Shield series models, this