it provides the necessary airflow modulation for optimized static pressure management

Rotation is typically determined by looking at the discharge side of the fan

This assembly comes factory-equipped with a BCR-18 orifice (0

replacing the Lochinvar & A

Each kit uses unique addressing

Fenwal 35-605311-221 Module 319847-401 it provides the necessary airflowUpgrade your gas fired appliance's reliability with the Fenwal 35 605311 221, a microprocessor based Direct Spark Ignition (DSI) control specifically engineered for precision and safety. This 24 VAC module replaces older, less stable ignition boards in furnaces, boilers, and water heaters, offering a robust 30 second pre purge cycle to clear the combustion chamber before the 4 second Trial For Ignition (TFI). As a veteran grade gas ignition module, it