Description
The Xylem-McDonnell & Miller 94-M-HD (Part Number 166000) is a heavy-duty combination low water cut off and pump controller engineered for reliable protection and control on steam boiler systems. Supplied as the head mechanism only, this unit is designed for straightforward field installation and replacement without the need to drain the boiler or disturb existing piping connections.
Product Overview
The 94-M-HD delivers dual-function operation in a single device — simultaneously serving as a low water cut off to protect the boiler from dangerous low-water conditions and as a pump controller to maintain proper water levels. Its rugged construction and manual reset design make it a trusted choice for commercial and industrial steam heating applications.
Key Features
- Combination low water cut off and pump controller in one unit
- Two snap-acting, manual reset SPDT switches for positive, reliable switching action
- Maximum working pressure: 250 PSI — suitable for demanding steam boiler applications
- Head mechanism only (Part Number 166000) — installs on existing McDonnell & Miller float chambers
- Manual reset operation ensures the system cannot restart automatically after a low-water event without operator intervention
- Snap-acting SPDT switch design provides precise, repeatable switching performance
- Heavy-duty construction built for long service life in commercial and industrial environments
Application
- Steam boilers in commercial and industrial heating systems
- Replacement head mechanism for existing McDonnell & Miller 94-M series installations
- Systems requiring both low water protection and pump control from a single device
Specifications
- SKU: 94-M-HD
- Part Number: 166000
- Brand: Xylem-McDonnell & Miller
- Type: Combination Low Water Cut Off / Pump Controller
- Switch Type: Two Snap-Acting Manual Reset SPDT Switches
- Maximum Pressure: 250 PSI
- Supply Includes: Head Mechanism Only
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