
Lochinvar & A.O. Smith 100208470 Control Board
The Lochinvar & A.O. Smith 100208470 Integrated Control Board is a critical OEM replacement component engineered specifically for SYNC SBN1300-1500 condensing boilers. As a primary main control power module, this board facilitates precise management of the combustion process, including modulating firing rates and integrated modbus communication for advanced system networking. This unit serves as the direct replacement for obsolete Lochinvar RLY20055 series boards, ensuring full backward compatibility with legacy commercial water heater and hydronic heating configurations. Designed for heavy-duty HVACR applications, the board incorporates integrated diagnostics to streamline troubleshooting of blower speeds, gas valve sequencing, and ignition cycles. Technicians can rely on this genuine OEM part to maintain thermal efficiency and manage complex safety circuits, including flame rectification and high-limit monitoring. Utilizing this Boiler Control Board ensures seamless integration with existing wiring harnesses, preserving the system's ability to modulate based on 0-10V BMS signals or internal setpoints.
Key Benefit List:- OEM Compatibility: Exact replacement for Lochinvar 100208470 and RLY20055, ensuring fit and function without field modifications.
- Precision Modulation: Orchestrates variable blower speeds and gas valve positioning to maximize condensing boiler efficiency.
- System Communication: Features Modbus capabilities, allowing for seamless integration into building management systems (BMS).
- Advanced Diagnostics: Simplifies repairs with on-board fault code reporting for rapid identification of ignition or sensor failures.
- Reliable Sequencing: Manages critical safety timings for pre-purge, trial for ignition, and post-purge cycles to protect the heat exchanger.
- Does this board replace older RLY20055 models? Yes, the 100208470 is the designated manufacturer replacement for the discontinued RLY20055 control board.
- Is this compatible with the SYNC SBN1500? Correct. This board is specifically engineered for SBN1300 through SBN1500 series condensing boilers starting with serial number prefix L09.
- What does a flashing status light on this board indicate? A standard single flash typically indicates normal operation (heartbeat), while specific pulse patterns correspond to error codes like ignition failure or air pressure switch faults.
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.
Original: $742.53
-65%$742.53
$259.89Lochinvar & A.O. Smith 100208470 Control Board
The Lochinvar & A.O. Smith 100208470 Integrated Control Board is a critical OEM replacement component engineered specifically for SYNC SBN1300-1500 condensing boilers. As a primary main control power module, this board facilitates precise management of the combustion process, including modulating firing rates and integrated modbus communication for advanced system networking. This unit serves as the direct replacement for obsolete Lochinvar RLY20055 series boards, ensuring full backward compatibility with legacy commercial water heater and hydronic heating configurations. Designed for heavy-duty HVACR applications, the board incorporates integrated diagnostics to streamline troubleshooting of blower speeds, gas valve sequencing, and ignition cycles. Technicians can rely on this genuine OEM part to maintain thermal efficiency and manage complex safety circuits, including flame rectification and high-limit monitoring. Utilizing this Boiler Control Board ensures seamless integration with existing wiring harnesses, preserving the system's ability to modulate based on 0-10V BMS signals or internal setpoints.
Key Benefit List:- OEM Compatibility: Exact replacement for Lochinvar 100208470 and RLY20055, ensuring fit and function without field modifications.
- Precision Modulation: Orchestrates variable blower speeds and gas valve positioning to maximize condensing boiler efficiency.
- System Communication: Features Modbus capabilities, allowing for seamless integration into building management systems (BMS).
- Advanced Diagnostics: Simplifies repairs with on-board fault code reporting for rapid identification of ignition or sensor failures.
- Reliable Sequencing: Manages critical safety timings for pre-purge, trial for ignition, and post-purge cycles to protect the heat exchanger.
- Does this board replace older RLY20055 models? Yes, the 100208470 is the designated manufacturer replacement for the discontinued RLY20055 control board.
- Is this compatible with the SYNC SBN1500? Correct. This board is specifically engineered for SBN1300 through SBN1500 series condensing boilers starting with serial number prefix L09.
- What does a flashing status light on this board indicate? A standard single flash typically indicates normal operation (heartbeat), while specific pulse patterns correspond to error codes like ignition failure or air pressure switch faults.
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
The Lochinvar & A.O. Smith 100208470 Integrated Control Board is a critical OEM replacement component engineered specifically for SYNC SBN1300-1500 condensing boilers. As a primary main control power module, this board facilitates precise management of the combustion process, including modulating firing rates and integrated modbus communication for advanced system networking. This unit serves as the direct replacement for obsolete Lochinvar RLY20055 series boards, ensuring full backward compatibility with legacy commercial water heater and hydronic heating configurations. Designed for heavy-duty HVACR applications, the board incorporates integrated diagnostics to streamline troubleshooting of blower speeds, gas valve sequencing, and ignition cycles. Technicians can rely on this genuine OEM part to maintain thermal efficiency and manage complex safety circuits, including flame rectification and high-limit monitoring. Utilizing this Boiler Control Board ensures seamless integration with existing wiring harnesses, preserving the system's ability to modulate based on 0-10V BMS signals or internal setpoints.
Key Benefit List:- OEM Compatibility: Exact replacement for Lochinvar 100208470 and RLY20055, ensuring fit and function without field modifications.
- Precision Modulation: Orchestrates variable blower speeds and gas valve positioning to maximize condensing boiler efficiency.
- System Communication: Features Modbus capabilities, allowing for seamless integration into building management systems (BMS).
- Advanced Diagnostics: Simplifies repairs with on-board fault code reporting for rapid identification of ignition or sensor failures.
- Reliable Sequencing: Manages critical safety timings for pre-purge, trial for ignition, and post-purge cycles to protect the heat exchanger.
- Does this board replace older RLY20055 models? Yes, the 100208470 is the designated manufacturer replacement for the discontinued RLY20055 control board.
- Is this compatible with the SYNC SBN1500? Correct. This board is specifically engineered for SBN1300 through SBN1500 series condensing boilers starting with serial number prefix L09.
- What does a flashing status light on this board indicate? A standard single flash typically indicates normal operation (heartbeat), while specific pulse patterns correspond to error codes like ignition failure or air pressure switch faults.
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.












