Hydrolevel 550 Low Water Cut-Off

The Hydrolevel 550 Low Water Cut-Off is a heavy-duty 120V electronic safety control designed for critical protection in hot water boiler systems. This unit serves as a direct replacement for PSE-801-M-120 and Slant/Fin 432-554-000, ensuring seamless field integration for service contractors. Engineered to prevent dry firing, the Hydrolevel 550 utilizes the EL1214 sensing probe to monitor water levels via conductivity. The manual reset functionality, requiring a 30-second delay, prevents nuisance burner cycling while ensuring a technician inspects the system after a low-water event. With an SPDT switch rated for 5.8A AFL at 120VAC and a 160 PSI maximum pressure rating, this control provides reliable performance in demanding hydronic applications. The integrated test button and indicator light allow for rapid diagnostic verification during routine maintenance or troubleshooting, making it a standard choice for professional boiler safety upgrades.

• Direct Cross-Reference: Expertly replaces Hydrolevel PSE-801-M-120 and Slant/Fin 432-554-000 without mounting modifications.
• Enhanced Safety Logic: Features a 15-second burner-off delay and a 30-second burner-on delay to stabilize operation.
• Rugged Construction: Rated for up to 160 PSI, suitable for a wide range of commercial and residential hot water boilers.
• Manual Reset Security: Ensures the system remains locked out after a failure until manually cleared, protecting the heat exchanger from damage.
• Reliable Sensing: Includes the EL1214 probe which uses the water itself as a conductor for precise level detection.

Can the Hydrolevel 550 be used on steam boilers?
No, this specific model is designed strictly for hot water boiler applications. For steam systems, a different Safgard model specifically rated for steam environments is required.

What is the purpose of the 30-second delay on the manual reset?
The delay is a safety feature that prevents immediate restarts, allowing the sensor to confirm stable water levels and preventing rapid cycling of the burner relay.

Does this unit come with the probe included?
Yes, the Hydrolevel 45-550 assembly includes the EL1214 sensing probe, providing a complete out-of-the-box solution for low water cut-off protection.

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.