Johnson Controls P170AA-118 Pressure Switch 100-400 PSI Open on Low

The Johnson Controls P170AA-118 is a dual-pressure control switch designed for HVAC and refrigeration systems. This automatic reset pressure control features a 100-400 PSI operating range with open-on-low pressure functionality, providing reliable system protection against low-pressure conditions.

Key Features:

• Pressure range: 100-400 PSI with open-on-low operation
• Automatic reset functionality for convenient operation
• Single pole double throw (SPDT) switching mechanism
• Durable steel case construction for long service life
• 1/4-inch male flare connection for easy installation
• Range adjustment screw allows field calibration
• UL and CSA listed for safety compliance

This pressure switch is commonly used in commercial refrigeration, air conditioning, and heat pump applications where monitoring and control of system pressure is critical. The open-on-low configuration ensures the system shuts down when pressure drops below the set point, protecting compressors and other components from damage due to loss of refrigerant or other low-pressure conditions.