McDonnell & Miller FS4-3RP-T Switch Els PW 29614 Key Benefits Dual-Function Diagnostics: Provides

Key Benefits Dual-Function Diagnostics: Provides simultaneous monitoring of system pressure (0–75 psi) and water temperature (60–320°F) for efficient commissioning

refrigerant bypassing the outdoor coil

The M1-M2 terminals should always be assigned to the blower circuit to ensure the fan is the first component on and the last component off during the heating cycle

preventing damage to the compressor and condenser coil

McDonnell & Miller FS4-3RP-T Switch Els PW 29614 Key Benefits Dual-Function Diagnostics: ProvidesThe McDonnell & Miller FS4 3RP T (Part #114639) is a standard setting liquid flow switch engineered for heavy duty service in commercial HVAC and hydronic systems. This paddle flow switch features a 1" NPT connection and is designed to provide reliable equipment protection in chilled water, boiler, and process applications. Equipped with high sensitivity SPDT switch contacts, it seamlessly integrates into control circuits to cycle pumps, fire alarms,