McDonnell & Miller 51-S-2-HD Cut Off Freon The integrated power outage feature

The integrated power outage feature prevents nuisance trips by allowing the control to automatically reset if liquid is present when power returns

The York S1-373-19806-100 utilizes a wrap-around design to distribute clamping force evenly across the motor shell

the S1-363-90016-701 ensures reliable flue gas containment and optimal AFUE ratings

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

restricting gas flow to the pilot only during the manual lighting cycle

McDonnell & Miller 51-S-2-HD Cut Off Freon The integrated power outage featureThe 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