Lochinvar & A.O. Smith 100167767 Control Board

The Lochinvar & A.O. Smith 100167767 Control Board is the direct performance replacement for the discontinued RLY30011 and RLY2200 integrated control modules. Engineered for precise HVAC modulation, this digital boiler control oversees critical firing sequences, including prepurge, ignition trials, and continuous flame monitoring. It is a standard component for Lochinvar Knight KBN (models 80–285) and Power-Fin (models 502–1302) systems, providing the high-speed processing required for modern hydronic applications. This OEM replacement part integrates seamlessly with existing wire harnesses, maintaining factory-spec safety parameters and diagnostic reporting. By regulating gas valve timing and blower speed, the board ensures optimal combustion efficiency across varying load demands. When replacing a failed integrated control board, verify that the F3 and F5 fuses are intact on the new module to prevent immediate shorts. This revision offers improved reliability over "old style" boards, featuring robust circuitry designed to withstand the thermal cycles common in high-recovery commercial and residential heating environments.

• Direct OEM Compatibility: Serves as the identical successor to RLY30011, ensuring a drop-in fit without field modifications.
• Advanced Troubleshooting: Built-in diagnostic capabilities allow for rapid identification of boiler fault codes and sensor failures.
• System Synchronization: Manages the lead-lag logic and pump relays to maintain consistent system pressure and temperature.
• Broad Application Range: Compatible with a wide array of Lochinvar KBN and Power-Fin units, reducing the need for multiple stock SKUs.

Is the 100167767 compatible with older RLY30011 units?
Yes, the 100167767 is the official manufacturer-designated replacement for the RLY30011. It utilizes the same mounting footprint and terminal connections for a seamless swap.

Will this board resolve a "No Display" error on my Lochinvar boiler?
While a "No Display" fault can be caused by the integrated control board, technicians should first check the 24V transformer and the onboard fuses before concluding the main module has failed.

Does this board require specialized programming after installation?
Most installations require setting the internal clock for night setback features and verifying that the control parameters match the specific BTU output of your Power-Fin or Knight chassis.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.