McDonnell & Miller 63-HD Head Mechanism Els PW 17895 As a direct replacement for

As a direct replacement for Lennox LB-29333BR and part number 60J30

Enhanced Electrical Stability: Provides a consistent 24V step-down to protect sensitive low-voltage control circuits from primary voltage fluctuations

By maintaining a concentric grip on the shaft

Always consult the manufacturer's technical data before attempting any field conversions

Rugged Steel Housing: Offers high dielectric strength (600V) and protects internal components from harsh job site debris

McDonnell & Miller 63-HD Head Mechanism Els PW 17895 As a direct replacement forThe McDonnell & Miller 63 HD Head Mechanism (Part Number 142600) is a heavy duty field replacement designed for Series 63 low water cut offs. As a veteran grade mechanical LWCO solution, this auto reset head assembly provides essential protection for both hot water and steam boilers in residential and commercial environments. Engineered to manage boiler pressure up to 50 PSI, the 142600 integrates the No. 2 SPDT switch to ensure reliable burner