Utica-Dunkirk 550001626 Control Board

When you are managing a service call for an Argo AT Series electric boiler, you need a control module that handles high-current switching without feedback issues. The Utica-Dunkirk 550001626 Control Board is the direct OEM replacement engineered specifically for 4-element configurations equipped with integrated circuit breakers. This board functions as the central processor for the hydronic system, precisely regulating boiler water temperature within a 90°F to 180°F operating range and maintaining a 200°F fixed high-limit safety cut-off.

For technicians fine-tuning system efficiency, the 550001626 offers an adjustable operating temperature differential of +/-4°F to +/-20°F. The layout includes dedicated diagnostic LED indicators for real-time status monitoring and circulator terminal contacts to support the integration of auxiliary safety devices. By utilizing this HVAC replacement circuit board, you ensure seamless logic communication between the heating elements and the primary safety loop, critical for maintaining boiler system performance in both residential and commercial applications.

• OEM Compatibility: Specifically designed as a drop-in replacement for Argo AT Series 4-element boilers with circuit breakers.
• Integrated Diagnostics: Features onboard LED indicator lights to rapidly verify safety circuit status and element engagement.
• Versatile Control: Provides adjustable differential settings to minimize short-cycling and optimize hydronic heating efficiency.
• Safety Integration: Includes terminals for optional low-water cut-off (LWCO) and flow switch controls to prevent dry-fire conditions.

What is the maximum temperature limit on the 550001626 board?
This control board is preset with a fixed 200°F high-limit safety to prevent system overheating, while allowing user-adjustable operating setpoints up to 180°F.

Can this board replace older Argo Z300 series controls?
The 550001626 is the specific replacement for 4-element units with breakers; always verify your specific boiler model number as some older "AT" or "Z" series models may require the 550001625 variant depending on the element count and breaker configuration.

Does this board control the circulator pump directly?
Yes, the board features dedicated terminal contacts to manage circulator operation in sequence with the heating demand phases.

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.