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Wiring Diagram for Johnson Controls Pressure Switch: Installation, Terminal Logic, and Setup

"A Johnson Controls pressure switch typically uses a single-pole, double-throw (SPDT) contact mechanism where Terminal 1 serves as the common line power feed. Terminal 2 acts as the high-pressure break contact (opening on pressure rise), and Terminal 3 serves as the low-pressure break contact (opening on pressure fall). Johnson Controls manufactures a broad catalog of electromechanical and electronic pressure switches widely deployed across commercial heating, ventilation, air conditioning, and refrigeration (HVAC/R) systems, as well as industrial process equipment and air compressors. The most ubiquitous electromechanical models belong to the..."

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