MCDONNELL & MILLER Low Water Cut-Off Control: Mfr Part # 150S-M
SKU 3G-OTH-79753
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Frequently Asked Questions
What is the MCDONNELL & MILLER 150S-M low water cut-off used for?
The MCDONNELL & MILLER 150S-M low water cut-off is used to protect steam boilers and hot water heating systems from damage caused by low water conditions. It automatically shuts down the burner when water level drops below safe limits, preventing overheating and potential boiler failure in commercial and industrial applications.
What are the specifications of the MCDONNELL & MILLER 150S-M?
The MCDONNELL & MILLER 150S-M is a low water cut-off control with manufacturer part number 150S-M. It is designed for replacement HVACR controls, switches, and thermostats. This device monitors water level in boilers and interrupts burner operation to prevent dry-firing, ensuring safe system operation.
Where to buy the MCDONNELL & MILLER 150S-M worldwide?
You can source the MCDONNELL & MILLER 150S-M low water cut-off through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this replacement HVACR control.
How to install the MCDONNELL & MILLER 150S-M low water cut-off?
Install the MCDONNELL & MILLER 150S-M by mounting it on the boiler water column or tapping in the side of the boiler at the recommended water line. Connect electrical wiring per the manufacturer's diagram, ensuring proper grounding. Test operation by lowering water level to verify burner shutdown. Always follow local codes and the OEM manual.
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3G Electric supplies MCDONNELL replacement hvacr controls, switches & thermostats. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.










