McDonnell & Miller FS7-4J Switch Refrigerant How do I verify the

How do I verify the BTU rating for my boiler

With a maximum operating pressure of 700 psig and a broad temperature rating of -40°F to 300°F

often at the contactor coil or thermostat wiring

Featuring a 12 5/8-inch diameter and a 1/2-inch bore

McDonnell & Miller FS7-4J Switch Refrigerant How do I verify theThe McDonnell & Miller FS7 4J (Part Number 120060) is a heavy duty industrial liquid flow switch designed for high demand applications including secondary filtration, hydronic heating, and process cooling. This model features a 1 1 4" BSPT connection and is equipped with a single pole, double throw (SPDT) snap switch, allowing for simultaneous make and break circuit control. Built for durability, it utilizes brass construction and a magnetic switching