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Ships within 48 hours · Estimated delivery Sep 23 - Sep 28
ensure your furnace burner assembly is properly grounded
accurate alignment without the need for specialized laser tools
The integrated power outage feature prevents nuisance trips by allowing the control to automatically reset if liquid is present when power returns
a full replacement is necessary to ensure consistent flame detection
This kit is over size/weight for free shipping
McDonnell & Miller 51-S-2-HD Cut Off Freon ensure your furnace burner assemblyThe 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
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