Description
Hydrolevel Safgard 550SV is a 120V commercial-grade low water cut-off (LWCO) for Gas or Oil-fired hot water boilers (or as a secondary on steam boilers) with manual reset, test button and short probe (designed to fit into a standard tee fitting). Immediately interrupts power in a low water condition, locks out burner circuit if water remains below probe level for longer than 30 seconds. Manual reset will not trip due to power failures. Test button simulates low water condition and allows for checking control without lowering the water level in a system.
