Johnson Controls P170DA-1 Pressure Control 30067439-890 The 310000P part number is

The 310000P part number is the standard designation for the junction box configuration in this voltage range

a humming/buzzing sound from the coil

This differential air pressure switch is factory-calibrated to a -1

Its precise fit is essential for maintaining the 1

Johnson Controls P170DA-1 Pressure Control 30067439-890 The 310000P part number isThe Johnson Controls P170DA 1 is a heavy duty high pressure cutout control designed for rugged performance in commercial refrigeration and air conditioning systems. This SPST open high pressure switch features a manual reset lockout mechanism, ensuring that once the system crosses the user defined safety threshold, it remains offline until a technician performs a manual inspection. This "trip free" lockout design is essential for protecting