Utica-Dunkirk 240009863 Auqastat

The Utica-Dunkirk 240009863 is a high-limit immersion aquastat engineered for precise thermal regulation in hydronic boiler systems. This SPST (Single Pole Single Throw) controller operates within a 140-240°F temperature range, functioning as a critical safety or operating limit. Designed to break on temperature rise, it ensures the burner or circulator cycles accurately based on the established setpoint. This unit is an OEM replacement part frequently utilized in ECR International brands, including Utica, Dunkirk, and Pennco boilers, providing a direct-fit solution that maintains original system efficiency. The horizontal mount configuration and liquid-filled sensing element offer rapid response times to temperature fluctuations within the immersion well. For technicians specializing in hydronic heating controls, this aquastat provides the necessary repeatability and industrial-grade construction required for heavy-duty boiler applications. Proper calibration of the high limit setting is essential to protect system integrity and optimize fuel consumption in both residential and light commercial boiler plants.

• Precise Thermal Control: Features a wide 140-240°F operating range suitable for various high-limit or operating control configurations.
• Direct OEM Compatibility: Engineered as a drop-in Utica-Dunkirk replacement part for streamlined field installation without modification.
• Robust SPST Switching: High-reliability snap-action switch ensures positive contact break upon reaching the temperature setpoint.
• Durable Sensing Element: Includes a high-sensitivity immersion bulb designed for rapid heat transfer and accurate monitoring.

• Is this aquastat a direct replacement for Honeywell L4006A series? Yes, this unit often cross-references with Honeywell L4006A models and is the standard OEM equivalent for many Utica and Dunkirk boiler models.
• Does this controller include the immersion well? Typically, these are designed to fit into existing 1/2" NPT wells, though technicians should verify if a new well is required based on the specific boiler tapping.
• Can this be used as a circulator controller? While it uses an SPST break-on-rise configuration, its primary application in the 140-240°F range is as a high-limit safety control.

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.