McDonnell & Miller 326950 Junction Box Cover

The McDonnell & Miller 326950 Junction Box Cover is a precision-engineered OEM replacement part designed for field technicians maintaining boiler control systems. This rugged component is specifically built for the McDonnell & Miller 42 and 150 Series low water cut-offs and level controls, directly replacing Model Number 150-436. It provides critical protection for internal electrical connections, shielding terminal blocks and wiring from dust, moisture, and mechanical damage to prevent short circuits in high-temp environments. When performing HVAC system maintenance or industrial boiler repairs, ensuring the integrity of the junction box enclosure is vital for safety compliance and uninterrupted operation.

Key Benefits:

• Direct HVAC replacement part compatibility with the 150-436 model ensures a secure fit without field modifications.
• Durable construction provides long-term protection for boiler control wiring in both residential and commercial steam applications.
• Designed for the 42 and 150 Series, maintaining the original equipment's environmental seal and safety ratings.
• Protects sensitive electrical terminals from contaminants, reducing the risk of premature switch failure or signal interference.

Common Questions:

Which control series is this junction box cover compatible with?
This cover is specifically engineered for use with McDonnell & Miller 42 and 150 Series units. It is the designated replacement for part number 326950 and model 150-436.

Does this part include the mounting screws?
Standard field practice involves reusing existing hardware, but this OEM part is sized precisely to fit existing mounting points on the 150-436 series housing.

Is this suitable for high-pressure steam boiler controls?
Yes, as an genuine enclosure component for the 150 Series, it is built to withstand the rigorous temperature and pressure demands typical of industrial steam and water level control environments.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.