including models from the Reznor OH

the 240009669 revision C is designed to be backward compatible with earlier revisions of the same control series used in ECR International boilers

Standardized 48 Frame: Features a 5

Using an incorrect voltage source or an AC supply without a proper controller will damage the internal electronics

ensuring the positive expulsion of flue gases

Hydrolevel 550SVR Low Water Cut-Off THPU32HP7Y including models from the ReznorThe 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