use the inverse mode setting to ensure the output relay de-energizes when the liquid drops below the lower electrode

this 100110806 switch is the primary suspect when the blower is running but ignition fails

Using it with R-22 will lead to incorrect superheat and potential system failure

When troubleshooting furnace short cycling or limit circuit lockout codes

this 1-1/4" NPT valve offers an impressive 15 Cv flow factor

Belimo 6150L Valve 326058-757 use the inverse mode settingThe Belimo 6150L is a 6 inch 2 way butterfly valve engineered for precision flow control in commercial HVAC and industrial process applications. As a direct cross reference for the F6150HD, this valve is designed for high performance modulation and bubble tight shutoff in chilled water, hot water, and condenser water loops. Built to withstand the rigors of mechanical rooms, it features a robust body construction compatible with standard ANSI flanges,