Overview
The Johnson Controls P170AA-2C is a single-pressure control device designed primarily for high-pressure cut-out, head-pressure control, and condenser fan cycling in commercial refrigeration and air conditioning systems. Engineered for use with non-corrosive refrigerants, it functions via a pressure-actuated bellows system that automatically resets once conditions return to safe operating levels.
Features
- Sight-Set Calibrated Adjustment: Displays a visible pressure scale for easier, precise adjustments without removing the cover.
- All-Steel Housing: Constructed with a durable steel case and cover to provide rugged, long-lasting protection for internal components.
- Auto Reset: Features automatic reset switch action, ensuring system continuity after pressure returns to standard parameters.
- Flexible Connection Style: Built with standard fitting points to ease integration into existing commercial piping and field applications.
Specifications
- Pressure Range: 0 to 150 psig
- Differential Pressure: 10 to 70 psi (adjustable)
- Switch Action: SPST (Single-Pole Single-Throw), Open-Low
- Pressure Connection: 1/4 inch Male Flare
- Maximum Working Pressure: 325 psig
- Maximum Over Pressure: 525 psig
- Contact Rating: 17 Amps at 240 V
Applications
- High-pressure cut-out limit control for commercial HVAC systems.
- Head-pressure control and condenser fan cycling in refrigeration and air conditioning units.
- Non-corrosive fluid applications involving air, water, and oil pressure monitoring.


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