The R33191A001 is specifically tuned for the sequence of operation designated by the control board

The 7B switch provides a proportional 135-ohm signal for modulating feed water systems

Can I use a different probe length for this application

and a two-wire installation path that simplifies retrofits

Does this valve include the LP conversion orifice

Lochinvar & A.O. Smith 100145536 322838-754 The R33191A001 is specifically tunedThe Lochinvar & A. O. Smith 100145536 is a critical Insulation Bottom Cover Frame (INSULBTMCF) designed to maintain the thermal integrity of the combustion chamber in high efficiency boiler and water heater systems. As a veteran tech, you know that degraded base insulation leads to excessive cabinet heat and lost efficiency. This OEM replacement part provides a high temperature thermal barrier at the unit's base, ensuring that heat energy is directed