Description
The Johnson Controls P170AB-2 is a heavy-duty SPST low pressure control engineered for reliable refrigerant circuit protection in commercial and industrial HVAC/R systems. With an Open-Low switching action, the control opens on a pressure drop, providing essential low-pressure safety cutout functionality to safeguard compressors and refrigeration equipment from damage caused by loss of refrigerant charge or abnormal suction pressure conditions.
Key Features
- SPST (Single-Pole, Single-Throw) switching action — Opens on low pressure
- Wide pressure range: 20″ Hg vacuum to 100 PSI, accommodating a broad variety of refrigerant applications
- Adjustable differential: 7–50 PSI, allowing precise reset point customization
- 1/4″ external flare connector for easy, leak-free field installation
- Limited knob mounted on differential screw for controlled, tamper-resistant adjustment
- Designed for use with all non-corrosive refrigerants
- Compatible with 120/208/240 VAC power supplies
Application
The P170AB-2 is ideally suited for low-pressure safety control in refrigeration and air conditioning systems using non-corrosive refrigerants. The Open-Low action ensures the compressor circuit is de-energized when suction pressure falls below the set point, preventing compressor damage and protecting system integrity. The wide operating range and broad differential adjustment make this control versatile across many commercial refrigeration and HVAC applications.
Specifications
- SKU / Part Number: P170AB-2
- Brand: Johnson Controls
- Switch Type: SPST
- Action: Open on Low Pressure (Open-Low)
- Pressure Range: 20″ Hg to 100 PSI
- Differential Range: 7–50 PSI
- Connection: 1/4″ External Flare
- Adjustment: Limited knob mounted on differential screw
- Refrigerant Compatibility: All non-corrosive refrigerants
- Voltage: 120/208/240 VAC
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