Lochinvar & A.O. Smith 100233421 Damper 326058-758 you typically use the terminals

you typically use the terminals that open on pressure rise

and acid to prevent system contamination issues

Steam Rated Durability: Specifically calibrated as a two-position steam zone valve

rotating it modifies the cut-in and cut-out points to prevent frequent equipment cycling

Smith boiler specifications for wire gauge and ampacity

Lochinvar & A.O. Smith 100233421 Damper 326058-758 you typically use the terminalsThe Lochinvar & A. O. Smith 100233421 Damper is a critical 5 inch automatic flue damper designed for the Lochinvar RBN090 boiler and A. O. Smith water heaters. This 24V motor actuated damper serves as a direct replacement for the legacy Lochinvar DRH2935, ensuring peak combustion efficiency by managing exhaust gas flow. When the burner cycle is in standby, the assembly closes to minimize standby heat loss, maintaining a higher energy factor and