Hydrolevel 550SVR Low Water Cut-Off 320720-756 this voltage-sensing switch features a

this voltage-sensing switch features a 5% low-heat input calibration

It is designed for scenarios where the motor is still functional but the plastic housing has deteriorated or cracked

Compact Open Board Design: Fits easily into existing control cabinets using the standard 1/16-inch screw mount standoffs

Precise Flame Detection: Optimizes the flame rectification circuit to ensure the control board receives a clear microamp signal

Hydrolevel 550SVR Low Water Cut-Off 320720-756 this voltage-sensing switch features aThe Hydrolevel 550SVR Low Water Cut Off is a professional grade safety control designed to prevent dry firing in 120Vac gas or oil fired boilers. This Safgard 550SVR LWCO features a 30 second delay to filter out nuisance shutdowns from temporary water surges, ensuring the burner circuit only locks out during sustained low water events. As a secondary control for steam boilers or a primary limit for hot water systems, it meets ASME CSD 1 requirements