McDonnell & Miller 63-M-HD Head Mechanism THPU32HP7Y This component is essential for

This component is essential for modern building automation systems (BAS) where occupancy sensor manual override functionality is required to maintain comfort during off-schedule hours

which is critical for maintaining efficiency in commercial and industrial heating applications

Common Questions Does the MT1-57 come with the sensor included

Most failures are secondary to a short circuit in the 24V line

008 ppm w/w maximum remaining oil content

McDonnell & Miller 63-M-HD Head Mechanism THPU32HP7Y This component is essential forThe McDonnell & Miller 63 M HD Head Mechanism (Part Number 143200) is a heavy duty replacement head mechanism designed for the Series 63 Low Water Cut Off. Engineered for both hot water and steam boilers, this manual reset mechanical control ensures critical safety by interrupting the electrical circuit to the burner in 15 psi steam or 50 psi water applications. It features a robust float operated design and includes the No. 2 M switch, providing