Hydrolevel 750 Low Water Cut-Off

The Hydrolevel 750 Low Water Cut-Off is a heavy-duty 120VAC safety control designed specifically for commercial and high-end residential steam or hot water boilers. Featuring a manual reset button, this unit ensures the burner remains locked out until the low water condition is physically inspected and cleared, following a 30-second delay to prevent nuisance cycling caused by surging water levels. This Safeguard 750 model utilizes Hydrolevel EL1214 sensing probe technology, which eliminates the mechanical failures associated with traditional float-style cut-offs. The electronic probe-type LWCO design provides superior reliability in systems prone to sediment buildup. Designed for seamless integration into existing boiler control circuits, the 45-750 LWCO is essential for meeting rigorous safety codes requiring manual intervention after a low-water event. This unit effectively monitors conductivity to protect the heat exchanger from dry-firing, ensuring the boiler low water safety sequence functions optimally under high-demand conditions.

• No Moving Parts: The probe-style design eliminates mechanical sticking or float failure, reducing emergency service calls.
• Manual Reset Feature: Provides an additional layer of safety by preventing automatic restarts after a dangerous low-water event.
• LED Diagnostics: Simplified troubleshooting with clear visual indicators for power and low-water status.
• Universal Compatibility: Works efficiently across various 120V boiler platforms requiring an EL1214 probe.
• Short-Delay Logic: The 30-second delay helps prevent burner flame-outs due to momentary water level fluctuations or surging.

What is the difference between the Hydrolevel 750 and 752 models?
The Hydrolevel 45-750 features a manual reset, whereas the 752 model is designed for automatic reset applications. Always check local code requirements to see if a manual reset is mandatory for your specific boiler installation.

Can the EL1214 probe be installed horizontally?
Yes, the Hydrolevel EL1214 probe can be installed in a tee or directly into a boiler tapping above the minimum safe water level, provided the probe does not touch any metal surfaces inside the pipe.

How does the 30-second delay function?
The low water cut-off 120V logic waits 30 seconds after the probe loses contact with water before de-energizing the burner circuit, which prevents unnecessary shutdowns during normal boiler operation.

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.