United Electric J21K-357 Pressure Switch 321702-401 What input signal is required

What input signal is required for this converter

verifying the integrity of this draft inducer switch is a standard protocol for mechanical contractors

Is a separate transformer required for the expansion panel

the fittings and internal volume are specifically engineered for the pressure ratings associated with modern York condensers

The F spade clip connector type ensures a secure

United Electric J21K-357 Pressure Switch 321702-401 What input signal is requiredThe United Electric J21K 357 is a dual bellows differential pressure switch engineered for precision monitoring in demanding HVAC and industrial environments. This model features an adjustable set point range of 0 to 70 PSID, providing reliable filter status monitoring and flow verification for chillers, compressors, and pump systems. The J21K 357 is housed in a rugged, epoxy coated aluminum NEMA 4 enclosure, ensuring protection against water and dust