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Handle the unit only by the round ceramic base
In high-demand HVACR environments
Whether you are performing a duct pressure switch replacement or integrating a sensor into a new ventilation build
Standard 24V AC control voltage integrates directly with most existing ignition modules and circuit boards
Hydrolevel 550SVR Low Water Cut-Off Refrigerant Handle the unit only byThe 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
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