White-Rodgers 11A79-2 Control

The White-Rodgers 11A79-2 is a professional-grade fast response immersion control engineered for direct installation into boiler water. This SPDT aquastat is a versatile solution for hydronic systems, functioning effectively as a high limit control, a low limit circulator control, or a combined low limit and circulator manager. Featuring a specialized hydraulic action element, the 11A79-2 ensures rapid sensing and reaction to temperature fluctuations, maintaining tight system parameters. The unit offers a broad temperature range of 100°F to 240°F (38°C to 116°C) with an adjustable differential from 7°F to 45°F, allowing technicians to fine-tune cycles for maximum efficiency. Designed for rugged field use, it includes a 1/2" pipe thread element with a 3-3/8" bulb extension and a 3/4" bushing to accommodate standard immersion well requirements. Its universal mounting capability ensures consistent performance in any orientation, making it a reliable hot water control for diverse mechanical room configurations.

• Rapid Thermal Response: The high-sensitivity hydraulic element detects temperature shifts quickly to protect boiler integrity.
• Flexible Switch Action: SPDT (Single Pole Double Throw) switching allows for diverse wiring configurations, including making or breaking a circuit on temperature rise.
• Precise Calibration: The visible temperature dial is calibrated in both Fahrenheit and Celsius for accurate field adjustments through the cover.
• Universal Compatibility: Operates on 120VAC (7.4A) or 240VAC (3.7A), fitting most residential and light commercial hydronic heating systems.
• Durable Construction: Built to withstand the harsh environments of HVACR boiler applications with a compact 5-3/8" H x 2-5/16" W footprint.

Can the 11A79-2 be used as a circulator controller?
Yes, because of its SPDT switch action, this control can be wired to start a circulator pump when the boiler water reaches the desired temperature setpoint.

What is the difference between this and a standard aquastat?
The 11A79-2 is specifically a fast response direct immersion model, meaning the sensing element is in more direct contact with the media than units relying on secondary wells, reducing thermal lag.

How do I adjust the differential on this unit?
The adjustable differential is located inside the housing, allowing you to set a range between 7°F and 45°F to prevent short-cycling of the burner or pump.

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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.