Hydrolevel 550LSV Low Water Cut-Off 120V Manual Reset with Test Button and Light

The Hydrolevel 550LSV Safgard is a commercial-grade electronic low water cut-off (LWCO) designed to protect hot water boilers from dangerous low water conditions. This 120-volt control features manual reset operation, an integrated test button, and LED indicator light for reliable boiler protection and easy maintenance verification.

Key Features:

• Immediately interrupts power when low water condition is detected
• Burner circuit locks out if water remains below probe for 30 seconds
• Manual reset will not trip due to power failures
• Test button allows checking burner circuit operation without lowering water level
• LED indicator light confirms control status and lock-out conditions
• Electronic probe design uses water as conductor for reliable level monitoring
• Designed for standard tee fitting installation
• Can also be used as secondary cut-off on steam boilers

Technical Specifications:

• Voltage: 120 VAC, 60 Hz
• Power Rating: 3.6 VA
• Amperage Rating: 5.8 FLA, 34.8 LRA
• Contact Configuration: SPDT
• Pressure Rating: 250 PSI maximum
• Burner Off Delay: 15 seconds
• Burner On Delay: 30 seconds
• Housing: Galvanized steel construction
• Certifications: UL Listed, CSA Certified, ASME CSD-1 Compliant, NEMA 1

This control combines Hydrolevel's decades of boiler control expertise with advanced electronic technology to provide dependable low water protection for commercial hot water boiler applications. The manual reset feature ensures operator awareness before system restart, while the test button enables routine maintenance checks without draining the boiler.