Trane SWT4049 Pressure Switch 321702-401 The 591 bill of materials

The 591 bill of materials typically includes a sight glass and Rotalock connections (1-1/4" suction

The oversized 3-1/8 inch non-flutter gauges provide high-contrast scales for superior legibility and precision compared to standard small-orifice gauges

This industrial time switch also includes a manual override lever

This Permanent Split Capacitor motor typically requires a 5 MFD / 370V run capacitor (sold separately) for proper torque and amperage draw

it minimizes pressure drop and stabilizes airflow

Trane SWT4049 Pressure Switch 321702-401 The 591 bill of materialsThe Trane SWT4049 High Pressure Switch is a critical safety component designed for precise refrigerant circuit monitoring in residential and light commercial HVAC systems. As a genuine OEM Trane replacement part, this pressure actuated switch is engineered to protect the compressor from catastrophic failure by interrupting the electrical circuit when discharge pressure exceeds safe operating parameters. Utilizing a factory calibrated set point, the