The Xylem-McDonnell & Miller 194-A (Part Number 166700) is a combination low water cut-off and pump controller engineered for reliable protection and precise pump management on steam boiler systems. Featuring two snap-acting SPDT switches, this unit simultaneously handles low water cut-off protection and pump on/off control in a single, compact device — simplifying installation and reducing the number of components required on the boiler.
Key Features
- Combination low water cut-off and pump controller in one unit
- Two snap-acting SPDT (Single-Pole Double-Throw) switches for independent cut-off and pump control functions
- Rated for steam boiler applications up to 250 PSI maximum working pressure
- Alternate tappings provide installation flexibility for a variety of boiler configurations
- Proven McDonnell & Miller float-operated design for dependable water level sensing
- Part Number: 166700
Application
Designed specifically for steam boilers, the 194-A monitors boiler water level continuously. When water drops to an unsafe level, the cut-off switch opens to shut down the burner, preventing costly dry-fire damage. Simultaneously, the pump controller switch cycles the feed pump to maintain proper water level automatically. The alternate tapping options make this control adaptable to a wide range of boiler tapping configurations found in commercial and residential steam heating systems.
Why Choose the McDonnell & Miller 194-A
- Dual-function design reduces installation time and hardware costs
- Snap-acting SPDT switches ensure positive, reliable switching action
- 250 PSI maximum pressure rating suits a broad range of steam boiler applications
- Alternate tappings add versatility for retrofit and new installations
- Backed by the trusted Xylem-McDonnell & Miller legacy of boiler safety controls
Specifications
- Model: 194-A
- Part Number: 166700
- Brand: Xylem-McDonnell & Miller
- Control Type: Combination Low Water Cut-Off and Pump Controller
- Switch Type: Two Snap-Acting SPDT Switches
- Maximum Working Pressure: 250 PSI
- Application: Steam Boilers
- Tapping Configuration: Alternate Tappings
