Lochinvar & A.O. Smith 100278134 Control
The Lochinvar & A.O. Smith 100278134 Control is a critical OEM User Interface Control board engineered for precise system management in high-efficiency condensing boilers. As a direct replacement for legacy part numbers RLY20136K, RLY20136, and 100189277, this Boiler Control Board provides the necessary digital interface for real-time monitoring and adjustment of combustion parameters. This HVAC Replacement Part is a standard component in the Lochinvar Knight KH055-285 series and the Knight FTXL fire tube boilers (models FTX400L through FTX725L), as well as compatible A.O. Smith commercial units. It handles integrated logic for ignition sequences, safety limit strings, and flame supervision. For field technicians, this Hydronic Heating Controller ensures seamless communication between the main power board and the user-facing display, allowing for accurate diagnostic code retrieval and setpoint configuration in demanding commercial and residential hydronic applications.
- Universal Compatibility: Validated for use across a wide range of Lochinvar Knight boiler parts, including KHN, WHL, and WHN series.
- Enhanced Diagnostics: Facilitates rapid troubleshooting by interfacing directly with the internal processor for error reporting and system status.
- OEM Integrity: Maintaining the original Lochinvar 100278134 specification ensures the equipment stays within its listing and performance curves.
- Efficient Calibration: Simplifies the setup of outdoor reset curves and multi-boiler lead/lag configurations through the digital display.
Common Questions
Is this control board a direct swap for the older RLY20136 series?
Yes, the 100278134 is the current authorized replacement for the RLY20136 and RLY20136K, featuring updated firmware for better stability.
What boiler models is this interface compatible with?
This unit is designed primarily for the Knight series (KH055 through KH400) and FTXL fire tube models (400L-725L). Always check your specific serial number for exact firmware matching.
Does this board control the ignition sequence?
While it acts as the user interface, it sends the required logic commands to the main integrated control to manage ignition, blower speed, and gas valve modulation.
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.
Lochinvar & A.O. Smith 100278134 Control
The Lochinvar & A.O. Smith 100278134 Control is a critical OEM User Interface Control board engineered for precise system management in high-efficiency condensing boilers. As a direct replacement for legacy part numbers RLY20136K, RLY20136, and 100189277, this Boiler Control Board provides the necessary digital interface for real-time monitoring and adjustment of combustion parameters. This HVAC Replacement Part is a standard component in the Lochinvar Knight KH055-285 series and the Knight FTXL fire tube boilers (models FTX400L through FTX725L), as well as compatible A.O. Smith commercial units. It handles integrated logic for ignition sequences, safety limit strings, and flame supervision. For field technicians, this Hydronic Heating Controller ensures seamless communication between the main power board and the user-facing display, allowing for accurate diagnostic code retrieval and setpoint configuration in demanding commercial and residential hydronic applications.
- Universal Compatibility: Validated for use across a wide range of Lochinvar Knight boiler parts, including KHN, WHL, and WHN series.
- Enhanced Diagnostics: Facilitates rapid troubleshooting by interfacing directly with the internal processor for error reporting and system status.
- OEM Integrity: Maintaining the original Lochinvar 100278134 specification ensures the equipment stays within its listing and performance curves.
- Efficient Calibration: Simplifies the setup of outdoor reset curves and multi-boiler lead/lag configurations through the digital display.
Common Questions
Is this control board a direct swap for the older RLY20136 series?
Yes, the 100278134 is the current authorized replacement for the RLY20136 and RLY20136K, featuring updated firmware for better stability.
What boiler models is this interface compatible with?
This unit is designed primarily for the Knight series (KH055 through KH400) and FTXL fire tube models (400L-725L). Always check your specific serial number for exact firmware matching.
Does this board control the ignition sequence?
While it acts as the user interface, it sends the required logic commands to the main integrated control to manage ignition, blower speed, and gas valve modulation.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Lochinvar & A.O. Smith 100278134 Control is a critical OEM User Interface Control board engineered for precise system management in high-efficiency condensing boilers. As a direct replacement for legacy part numbers RLY20136K, RLY20136, and 100189277, this Boiler Control Board provides the necessary digital interface for real-time monitoring and adjustment of combustion parameters. This HVAC Replacement Part is a standard component in the Lochinvar Knight KH055-285 series and the Knight FTXL fire tube boilers (models FTX400L through FTX725L), as well as compatible A.O. Smith commercial units. It handles integrated logic for ignition sequences, safety limit strings, and flame supervision. For field technicians, this Hydronic Heating Controller ensures seamless communication between the main power board and the user-facing display, allowing for accurate diagnostic code retrieval and setpoint configuration in demanding commercial and residential hydronic applications.
- Universal Compatibility: Validated for use across a wide range of Lochinvar Knight boiler parts, including KHN, WHL, and WHN series.
- Enhanced Diagnostics: Facilitates rapid troubleshooting by interfacing directly with the internal processor for error reporting and system status.
- OEM Integrity: Maintaining the original Lochinvar 100278134 specification ensures the equipment stays within its listing and performance curves.
- Efficient Calibration: Simplifies the setup of outdoor reset curves and multi-boiler lead/lag configurations through the digital display.
Common Questions
Is this control board a direct swap for the older RLY20136 series?
Yes, the 100278134 is the current authorized replacement for the RLY20136 and RLY20136K, featuring updated firmware for better stability.
What boiler models is this interface compatible with?
This unit is designed primarily for the Knight series (KH055 through KH400) and FTXL fire tube models (400L-725L). Always check your specific serial number for exact firmware matching.
Does this board control the ignition sequence?
While it acts as the user interface, it sends the required logic commands to the main integrated control to manage ignition, blower speed, and gas valve modulation.
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.
