Description
McDonnell & Miller 129302 42S Combo Low Water Cut-Off & Pump Controller (Steam Boilers)
The McDonnell & Miller 42S Pump Controller LWCO is a trusted all-in-one solution designed for steam boilers requiring precise water level management and pump control. Ideal for residential, commercial, and industrial steam systems, this controller ensures safe, reliable operation while protecting your boiler from low water conditions.
Key Features:
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Suitable for low to medium pressure steam boilers with separate water columns
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Robust Monel bellows resist corrosion, extending product life
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Equipped with single pole, single throw (SPST) mercury switches for dependable performance
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Enclosed junction box safeguards electrical components
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Optional quick hook-up fittings and gauge glass connector for easy installation
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Threaded 1" connections for secure, standard fit
Specifications:
| Feature | Details |
|---|---|
| Max Pressure (PSI) | 50 PSI (3.5 kg/cm²) |
| Switch Type | SPST Mercury Switch |
| Reset Type | Automatic |
| Connection Size & Type | 1" Threaded |
| Electrical Ratings (AFL) | 3.7 A @ 240 VAC / 7.4 A @ 120 VAC |
| Electrical Ratings (ALR) | 44.4 A @ 120 VAC / 22.2 A @ 240 VAC |
| Pilot Duty Rating | 345 VA |
