Lochinvar & A.O. Smith 100167825 Integrated Control

When 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 integrated boiler control board, it regulates blower speed and gas valve voltage to maintain precise firing rates based on 10V signal inputs or internal set points, ensuring the condensing heat exchanger operates at peak thermal efficiency without short-cycling.

This HVAC control board oversees the entire safety string, including high-limit switches, low water cut-offs, and air pressure switches. By consolidating ignition, temperature regulation, and advanced diagnostics into a single CCB circuit board, it minimizes wiring complexity and reduces potential points of failure at terminal connections. For technicians, the onboard PC interface and UIM display compatibility allow for rapid troubleshooting of error codes, parameter adjustments for outdoor reset curves, and DHW priority logic, making it the standard for maintaining Lochinvar KnightXL and certain A.O. Smith high-efficiency water heater commercial applications.

• Precise Burner Modulation: Directly manages blower speed and gas valve response to match real-time BPU load, maximizing fuel economy.
• Comprehensive Safety Integration: Constant monitoring of the flame rod current and limit switches prevents unsafe firing conditions.
• Simplified Diagnostics: Onboard memory stores fault history, allowing contractors to identify "Ignition Failure" or "Blocked Inlet" errors quickly.
• OEM Compatibility: Guaranteed fit for KnightXL KBN601, KBN701, and KBN801 models, ensuring no field-modification of the mounting bracket is needed.

How do I resolve an "AC Reversed" error after installing this control?
This usually indicates the power supply polarity is swapped at the junction box. Verify that the 120VAC "hot" and neutral legs are correctly landed; the 100167825 board requires a solid ground for proper flame sensing current.

Will this board work for older KBN models?
This specific integrated control is designed for units beginning with the H10 serial prefix. Always check the revision level on your existing SMART SYSTEM module before replacement.

Does this control manage the system and DHW pumps?
Yes, it features dedicated relay logic to switch boiler, system, and DHW pumps on and off based on the programmed heating priority and ramp delay settings.

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.