always verify your specific boiler model number as some older "AT" or "Z" series models may require the 550001625 variant depending on the element count and breaker configuration

or an electrical failure preventing the motor from reaching the necessary RPM to close the pressure switch

Designed for intake air filtration

including 16200

Fireye MEC320 Chassis R-410A always verify your specific boilerThe Fireye MEC320 is a rugged, microprocessor based MicroM Chassis designed for high performance flame safeguard control in commercial and industrial burner applications. This 120 VAC chassis serves as the foundation for a modular burner management system, providing 50 60 Hz operation and a local reset button for immediate manual intervention. Engineered for versatility, the Fireye MEC320 is backward compatible with legacy TFM, UVM, and M Series II