this Maxitrol amplifier replacement kit ensures your indirect-fired duct furnace maintains tight temperature margins and fuel efficiency

including models from the Reznor OH

ensuring the positive expulsion of flue gases

responding to 2-10VDC speed signals for dynamic airflow management

Hydrolevel 550SVR Low Water Cut-Off THPU32HP7Y this Maxitrol amplifier replacement kitThe 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