McDonnell & Miller 750-MT-24 Control R-410A Constructed with a heavy-duty frame

Constructed with a heavy-duty frame and high-quality ball bearings

This SPST temperature responsive control features an auto-reset function with a precise 3-inch insertion probe

the 661029R is calibrated specifically for Natural Gas

Direct Compatibility: Designed specifically for the Fenwal DH-60 (2W/4W) and SmartOne DH-2000 housings

McDonnell & Miller 750-MT-24 Control R-410A Constructed with a heavy-duty frameThe McDonnell & Miller 750 MT 24 (Part Number 176293) is a heavy duty 24Vac manual reset low water cut off designed for professional integration into both hot water and steam boilers. As a veteran grade electronic LWCO, this unit serves as a reliable primary or secondary control for commercial and industrial hydronic systems. This GuardDog Series 750 control features a manual reset mechanism, ensuring that once a low water condition is detected and