Description
The Johnson Controls P170AB-12 is a single-pole, single-throw (SPST) low pressure control engineered for reliable refrigeration system protection. Configured to open on a pressure drop (Open-Low), this control automatically interrupts the circuit when system pressure falls below the set point, safeguarding compressors and refrigeration equipment from damage caused by low-charge or loss-of-refrigerant conditions.
Key Features
- SPST switching action — Opens on low pressure for compressor protection
- Wide operating range: 12″ Hg (vacuum) to 80 PSI, suitable for a broad range of low-side refrigeration applications
- Adjustable differential: 5–35 PSI, allowing precise control over cut-in and cut-out points
- 1/4″ external flare connector for easy, leak-free field installation
- Limited knob adjustment included for convenient set-point configuration
- Rated for non-corrosive refrigerants — compatible with common HCFC and HFC refrigerants
- Electrical ratings: 120/208/240 VAC — suitable for single- and multi-phase commercial control circuits
Specifications
- SKU: P170AB-12
- Brand: Johnson Controls
- Switch Type: SPST
- Action: Open on Low Pressure
- Pressure Range: 12″ Hg to 80 PSI
- Differential Range: 5–35 PSI
- Connection: 1/4″ External Flare
- Electrical Rating: 120/208/240 VAC
- Refrigerant Compatibility: Non-Corrosive Refrigerants
- Adjustment: Limited Knob Adjustment Included
Application
Ideal for use in commercial refrigeration and air conditioning systems where low-side pressure monitoring is critical. The P170AB-12 provides dependable cut-out protection to prevent compressor short-cycling and damage due to low refrigerant pressure events. Its wide pressure range and field-adjustable differential make it a versatile choice for contractors and service technicians working across a variety of refrigeration equipment.
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