McDonnell & Miller 51-S-2-HD Cut Off Freon accurate alignment without the need

accurate alignment without the need for specialized laser tools

a full replacement is necessary to ensure consistent flame detection

Critical Components Included: Features the specialized bleed port fittings and elbows necessary for the normally-closed operation of the E-Series

ensure your furnace burner assembly is properly grounded

A functional 10KW 240V heater element typically shows a reading between 9 and 50 ohms

McDonnell & Miller 51-S-2-HD Cut Off Freon accurate alignment without the needThe McDonnell & Miller 51 S 2 HD (Part Number 136200) serves as a heavy duty head mechanism only for professional grade water level control. Engineered for high capacity low pressure steam and hot water boiler systems, this unit integrates a mechanical water feeder with a low water cut off (LWCO) function via a built in Snap Acting SPDT switch (No. 2 Switch). It is designed to handle a maximum vessel pressure of 35 PSI and an inlet water supply up to