Description
Xylem-McDonnell & Miller 93-HD Combination Low Water Cut Off and Pump Controller
The Xylem-McDonnell & Miller 93-HD is a professional-grade combination low water cut off and pump controller engineered specifically for steam boiler applications. Sold as the head mechanism only (Part Number 162400), this unit is an ideal replacement or upgrade component for existing installations, delivering reliable boiler protection and pump management in a single, compact assembly.
Dual-Function Boiler Protection
The 93-HD combines two critical boiler safety functions into one device — low water cut off protection and pump control. By integrating both functions, it simplifies wiring, reduces installation time, and minimizes potential points of failure in your steam boiler system.
Key Features
- Combination low water cut off and pump controller in a single unit
- Two snap-acting SPDT (Single-Pole Double-Throw) switches for reliable switching performance
- Rated for steam boilers with a maximum pressure of 150 PSI
- Head mechanism only — compatible with McDonnell & Miller 93-HD body assemblies
- Part Number: 162400
- Designed for dependable, long-service operation in demanding steam boiler environments
Application
The 93-HD head mechanism is designed for use on steam boilers in commercial and industrial hydronic heating systems. The snap-acting SPDT switches provide positive, reliable action for both pump control and low water cut off functions, helping protect the boiler from potentially damaging dry-fire conditions while maintaining proper system water levels.
Why Choose McDonnell & Miller
McDonnell & Miller, a brand of Xylem, has been a trusted name in boiler controls and hydronic heating components for decades. The 93-HD continues that tradition of quality, offering installers and service technicians a dependable solution for steam boiler protection and pump management.
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