Lochinvar & A.O. Smith 100167865 Board L99H008 The 193-B is a water

The 193-B is a water column style controller specifically designed with a larger body and 1-1/4 inch NPT tappings (compared to 1 inch on the standard 93 or 193-D) to match specific commercial steam boiler manifold requirements

effectively converting rotary motion into linear force through damper linkage kits like the ZG-LF112

utilizing a clockwise (CW) rotation to match factory specifications

For a professional

As a direct factory-authorized replacement for the discontinued 51-24374-11

Lochinvar & A.O. Smith 100167865 Board L99H008 The 193-B is a waterWhen you're out in the field servicing high performance Shield water heaters, the Lochinvar & A. O. Smith 100167865 Board is the backbone of the system's logic and safety. Formerly known by part number RLY30112, this integrated control board is a genuine OEM replacement part engineered specifically for the Shield SNR126, SNR151, and SNR201 models. As an HVAC technology professional, you know that keeping these units running at peak thermal efficiency