Weil McLain 510-312-041 Aquastat

The Weil McLain 510-312-041 Aquastat is a mission-critical hydronic temperature controller engineered for precise thermal regulation within Weil McLain boiler systems, including the EGH series. This OEM immersion controller utilizes an integrated capillary sensor to monitor the heating medium, providing high-accuracy feedback to the burner and circulator circuits. With an adjustable temperature range of 100°F to 240°F, this unit ensures the system maintains optimal setpoints, preventing overheating while maximizing combustion efficiency through tightened thermal cycles. Specifically designed as a replacement aquastat for EGH-105, EGH-115, and EGH-125 models, it provides direct compatibility with existing boiler wiring harnesses, eliminating the need for field modifications. Professionals rely on the 510-312-041 for its rugged construction and its ability to respond rapidly to thermal load changes, ensuring steady heat delivery in residential and light commercial applications.

• Precise Thermal Management: An adjustable 100-240°F range allows for fine-tuning boiler performance based on specific heat load requirements.
• Direct OEM Compatibility: Verified fit for Weil McLain EGH boilers, ensuring seamless integration with factory electrical controls and circulator pump operations.
• Enhanced System Protection: Accurate temperature sensing prevents high-limit excursions, protecting the heat exchanger from thermal stress.
• Optimized Energy Usage: Maintains tight temperature differentials to reduce fuel consumption and prevent short-cycling of the burner ignition module.

Which boiler models are compatible with this aquastat?
The 510-312-041 is the specified OEM replacement part for Weil McLain EGH-105, EGH-115, and EGH-125 boiler models.

What is the primary function of the capillary sensor?
The sensor penetrates the heating medium to provide real-time water temperature data, allowing the controller to cycle the burner or circulator to maintain the desired thermal setpoint.

Can this be used as a universal hydronic controller?
No, this unit is specifically designed for Weil McLain heating systems and features indexed electrical connections tailored for their proprietary control configurations.

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.