
Weil McLain 510-312-091 Hi-Low Limit
The Weil McLain 510-312-091 Hi-Low Limit is a specialized hydronic control engineered for precise water temperature regulation in residential and commercial boiler systems. Designed for field-proven reliability, this aquastat limit control manages the high limit (to prevent system overheating) and the low limit (to maintain base water temperature), crucial for boilers equipped with tankless coils. This W-M OEM part features a 120 VAC power rating with a 10 AMP full load capacity, ensuring it can handle the electrical demands of most standard circulator pumps and burner circuits. With a temperature limit range specifically calibrated for Weil McLain water boilers, it delivers accurate sensing to optimize boiler performance and prevent thermal stress. For technicians performing hydronic heating maintenance, this limit control is an essential direct-fit replacement to ensure the safe and efficient cycling of the heat exchanger.
Key Benefits:- Dual-Function Control: Integrated high-low limit logic manages both safety shut-off and minimum operating temperatures.
- OEM Compatibility: Precision-matched for Weil McLain boilers, ensuring accurate thermal response times and electrical pin-out alignment.
- System Protection: Prevents rapid short-cycling and potential boiler damage by maintaining optimal water temperature differentials.
- Rugged Build: Industrial-grade sensing mechanism designed to withstand high-vibration and high-heat environments typical of boiler cabinets.
- Can this be used on steam boilers? No, the Weil McLain 510-312-091 is specifically designed for hot water boilers and hydronic applications.
- Does this include the immersion well? This part typically mounts to an existing drywell; always verify the sensing bulb depth matches your current well for accurate readings.
- When should I replace my aqua limit? If the boiler is exceeding set-point temperatures or failing to fire during a call for heat despite proper line voltage, the limit control sensors may have drifted or failed.
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.
Weil McLain 510-312-091 Hi-Low Limit
The Weil McLain 510-312-091 Hi-Low Limit is a specialized hydronic control engineered for precise water temperature regulation in residential and commercial boiler systems. Designed for field-proven reliability, this aquastat limit control manages the high limit (to prevent system overheating) and the low limit (to maintain base water temperature), crucial for boilers equipped with tankless coils. This W-M OEM part features a 120 VAC power rating with a 10 AMP full load capacity, ensuring it can handle the electrical demands of most standard circulator pumps and burner circuits. With a temperature limit range specifically calibrated for Weil McLain water boilers, it delivers accurate sensing to optimize boiler performance and prevent thermal stress. For technicians performing hydronic heating maintenance, this limit control is an essential direct-fit replacement to ensure the safe and efficient cycling of the heat exchanger.
Key Benefits:- Dual-Function Control: Integrated high-low limit logic manages both safety shut-off and minimum operating temperatures.
- OEM Compatibility: Precision-matched for Weil McLain boilers, ensuring accurate thermal response times and electrical pin-out alignment.
- System Protection: Prevents rapid short-cycling and potential boiler damage by maintaining optimal water temperature differentials.
- Rugged Build: Industrial-grade sensing mechanism designed to withstand high-vibration and high-heat environments typical of boiler cabinets.
- Can this be used on steam boilers? No, the Weil McLain 510-312-091 is specifically designed for hot water boilers and hydronic applications.
- Does this include the immersion well? This part typically mounts to an existing drywell; always verify the sensing bulb depth matches your current well for accurate readings.
- When should I replace my aqua limit? If the boiler is exceeding set-point temperatures or failing to fire during a call for heat despite proper line voltage, the limit control sensors may have drifted or failed.
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.
Product Information
Product Information
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Description
The Weil McLain 510-312-091 Hi-Low Limit is a specialized hydronic control engineered for precise water temperature regulation in residential and commercial boiler systems. Designed for field-proven reliability, this aquastat limit control manages the high limit (to prevent system overheating) and the low limit (to maintain base water temperature), crucial for boilers equipped with tankless coils. This W-M OEM part features a 120 VAC power rating with a 10 AMP full load capacity, ensuring it can handle the electrical demands of most standard circulator pumps and burner circuits. With a temperature limit range specifically calibrated for Weil McLain water boilers, it delivers accurate sensing to optimize boiler performance and prevent thermal stress. For technicians performing hydronic heating maintenance, this limit control is an essential direct-fit replacement to ensure the safe and efficient cycling of the heat exchanger.
Key Benefits:- Dual-Function Control: Integrated high-low limit logic manages both safety shut-off and minimum operating temperatures.
- OEM Compatibility: Precision-matched for Weil McLain boilers, ensuring accurate thermal response times and electrical pin-out alignment.
- System Protection: Prevents rapid short-cycling and potential boiler damage by maintaining optimal water temperature differentials.
- Rugged Build: Industrial-grade sensing mechanism designed to withstand high-vibration and high-heat environments typical of boiler cabinets.
- Can this be used on steam boilers? No, the Weil McLain 510-312-091 is specifically designed for hot water boilers and hydronic applications.
- Does this include the immersion well? This part typically mounts to an existing drywell; always verify the sensing bulb depth matches your current well for accurate readings.
- When should I replace my aqua limit? If the boiler is exceeding set-point temperatures or failing to fire during a call for heat despite proper line voltage, the limit control sensors may have drifted or failed.
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.











