McDonnell & Miller MM-601M General Purpose Liquid Flow Switch Instruction Manual

About this manual

The document serves as an instruction manual for the McDonnell & Miller MM-601M 246796 Series FS4-3 General Purpose Liquid Flow Switch. It provides detailed guidance on determining the correct paddle size based on pipe diameter and flow rate, including formulas for trimming paddles if necessary.

The guide details installation steps, covering both mechanical assembly into a pipe tee and electrical connections. It explains how to configure the switch for either 'Flow' or 'No Flow' modes by connecting wires to specific terminals (C, N.O., N.C.) and outlines a testing procedure to verify proper operation.

What's inside

• Paddle Sizing
• Pipe Size Installation
• Cover Removal and Installation
• Electrical Installation
• Testing Procedure

Frequently asked questions

How do you determine the correct paddle length for a specific pipe size?

Determine the correct paddle length from the chart provided in the manual based on the pipe size and flow rate.

What is the formula to change the paddle length if the flow rate exceeds the maximum adjustment?

Use the formula: Paddle Length = K / Flow Rate (GPM).

How do you configure the switch for 'No Flow' mode?

Connect the wire from the device to the 'N.C.' contact and connect the 'Hot' power supply wire to the 'C' terminal.