
Lochinvar & A.O. Smith 100277838 Board
For veteran technicians servicing high-efficiency systems, the Lochinvar & A.O. Smith 100277838 Connection Board is a critical OEM component designed for low voltage control integration. Specifically engineered for FTXL and FTX fire tube condensing boilers (models 400-850 N/L), this board acts as the central hub for electrical component communication, ensuring the host SMART SYSTEM control operates with maximum precision. Whether you are managing a Building Management System (BMS) via ModBus/BACnet or handling standard field wiring, this board facilitates stable signal paths for gas pressure switches, flow switches, and low water cutoffs (LWCO). Its high-grade circuitry provides the real-time diagnostic capabilities necessary to minimize sensor-related downtime and maintain peak thermal efficiency in demanding commercial or residential applications.
Key Benefits- OEM Compatibility: Guaranteed fit for Lochinvar FTXL/FTX 400-850 and select A.O. Smith water heating units.
- Enhanced Reliability: Provides a stable interface for critical safety inputs, including blocked drain switches and high-limit sensors.
- Contractor-Grade Durability: Built to withstand the thermal and electrical rigors of continuous boiler operation.
- Low Voltage Precision: Optimizes 24V communication between the main control module and field-installed accessories.
- Streamlined Installation: Features clearly labeled terminal blocks to reduce wiring errors during field replacement.
What boiler models is the 100277838 compatible with?
This board is primarily designed for Lochinvar FTXL and FTX fire tube condensing boilers ranging from 400,000 to 850,000 BTU. Always verify your specific model and serial number before installation.
Does this board support BMS integration?
Yes, it functions as the interface for various low-voltage controls that can be tied into broader Energy Management Systems (EMS) and Building Automation Systems (BAS).
What are the signs of a failing connection board?
Common indicators include intermittent 'Gas Pressure SW' or 'Flow Switch' error codes when the external devices themselves are functioning correctly, or a complete loss of communication with the SMART SYSTEM display.
This item is not eligible for free shipping.
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 100277838 Board
For veteran technicians servicing high-efficiency systems, the Lochinvar & A.O. Smith 100277838 Connection Board is a critical OEM component designed for low voltage control integration. Specifically engineered for FTXL and FTX fire tube condensing boilers (models 400-850 N/L), this board acts as the central hub for electrical component communication, ensuring the host SMART SYSTEM control operates with maximum precision. Whether you are managing a Building Management System (BMS) via ModBus/BACnet or handling standard field wiring, this board facilitates stable signal paths for gas pressure switches, flow switches, and low water cutoffs (LWCO). Its high-grade circuitry provides the real-time diagnostic capabilities necessary to minimize sensor-related downtime and maintain peak thermal efficiency in demanding commercial or residential applications.
Key Benefits- OEM Compatibility: Guaranteed fit for Lochinvar FTXL/FTX 400-850 and select A.O. Smith water heating units.
- Enhanced Reliability: Provides a stable interface for critical safety inputs, including blocked drain switches and high-limit sensors.
- Contractor-Grade Durability: Built to withstand the thermal and electrical rigors of continuous boiler operation.
- Low Voltage Precision: Optimizes 24V communication between the main control module and field-installed accessories.
- Streamlined Installation: Features clearly labeled terminal blocks to reduce wiring errors during field replacement.
What boiler models is the 100277838 compatible with?
This board is primarily designed for Lochinvar FTXL and FTX fire tube condensing boilers ranging from 400,000 to 850,000 BTU. Always verify your specific model and serial number before installation.
Does this board support BMS integration?
Yes, it functions as the interface for various low-voltage controls that can be tied into broader Energy Management Systems (EMS) and Building Automation Systems (BAS).
What are the signs of a failing connection board?
Common indicators include intermittent 'Gas Pressure SW' or 'Flow Switch' error codes when the external devices themselves are functioning correctly, or a complete loss of communication with the SMART SYSTEM display.
This item is not eligible for free shipping.
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.
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Description
For veteran technicians servicing high-efficiency systems, the Lochinvar & A.O. Smith 100277838 Connection Board is a critical OEM component designed for low voltage control integration. Specifically engineered for FTXL and FTX fire tube condensing boilers (models 400-850 N/L), this board acts as the central hub for electrical component communication, ensuring the host SMART SYSTEM control operates with maximum precision. Whether you are managing a Building Management System (BMS) via ModBus/BACnet or handling standard field wiring, this board facilitates stable signal paths for gas pressure switches, flow switches, and low water cutoffs (LWCO). Its high-grade circuitry provides the real-time diagnostic capabilities necessary to minimize sensor-related downtime and maintain peak thermal efficiency in demanding commercial or residential applications.
Key Benefits- OEM Compatibility: Guaranteed fit for Lochinvar FTXL/FTX 400-850 and select A.O. Smith water heating units.
- Enhanced Reliability: Provides a stable interface for critical safety inputs, including blocked drain switches and high-limit sensors.
- Contractor-Grade Durability: Built to withstand the thermal and electrical rigors of continuous boiler operation.
- Low Voltage Precision: Optimizes 24V communication between the main control module and field-installed accessories.
- Streamlined Installation: Features clearly labeled terminal blocks to reduce wiring errors during field replacement.
What boiler models is the 100277838 compatible with?
This board is primarily designed for Lochinvar FTXL and FTX fire tube condensing boilers ranging from 400,000 to 850,000 BTU. Always verify your specific model and serial number before installation.
Does this board support BMS integration?
Yes, it functions as the interface for various low-voltage controls that can be tied into broader Energy Management Systems (EMS) and Building Automation Systems (BAS).
What are the signs of a failing connection board?
Common indicators include intermittent 'Gas Pressure SW' or 'Flow Switch' error codes when the external devices themselves are functioning correctly, or a complete loss of communication with the SMART SYSTEM display.
This item is not eligible for free shipping.
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.












