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Retrofit Ready: Standard 1-inch NPT union inlet by NPT female outlet configuration simplifies replacement of older 25AUB units
ensuring S1-373-18170-202 compatibility with specific York air handlers and furnaces
single-phase electrical profile
this unit ensures reliable pull-in and drop-out performance even under demanding operational cycles
use the integrated set-screw on the pressure switch
Lochinvar & A.O. Smith 100167825 Integrated Control 321042-401 Retrofit Ready: Standard 1-inch NPTWhen you're dealing with a KnightXL series lock out or communication failure, the Lochinvar & A. O. Smith 100167825 Integrated Control is the specific OEM replacement part required to restore full system modulation. This SMART SYSTEM control module is engineered specifically for KBN601 through KBN801 boiler models (beginning with serial H10), managing the critical sequence of operation from pre purge to flame rectification. As a high efficiency