Johnson Controls P70AB-2 Single Pole Low Pressure Control
The Johnson Controls P70AB-2 is a single-pole, low-pressure control designed for use in refrigeration and air conditioning systems. It protects compressors from damage due to low suction pressure. The control automatically shuts down the compressor when the suction pressure drops below the setpoint and restarts it when the pressure rises above the cut-in point.
- Model
- Johnson Controls P70AB-2
- Calibration
- Available on request
- Price
- $125
- Status
- In stock
- RFQ ref
- P70AB-2
This unit
The Johnson Controls P70AB-2 is a single-pole, single-throw (SPST) low-pressure control for commercial refrigeration and air conditioning systems. This open-low switch functions as a low-pressure cut-out, pump-down control, and capacity control - automatically shutting down the system when suction pressure falls below setpoint and restarting when pressure rises above the cut-in point. The all-steel case delivers rugged protection in demanding environments while accommodating a broad pressure range of 20 in. Hg to 100 psig with differential adjustment from 6 psi to 50 psi (minimum 7 psi, maximum 50 psi). A 36-inch capillary tube with 1/4-inch flare nut connects to the pressure source, and sight-set calibrated adjustment provides field configuration. Maximum overpressure rating is 325 psig.
Technical Specifications
Pressure Range: 20 in. Hg to 100 psig
Differential Range: 6 psi to 50 psi (minimum 7 psi, maximum 50 psi)
Maximum Overpressure: 325 psig
Switch Type: Single Pole, Single Throw (SPST), Open Low
Pressure Connector: 36-inch capillary with 1/4-inch flare nut
Adjustment Method: Sight-set calibrated pressure adjustment; limited knob adjustment on select models
Construction: All-steel case and cover
Electrical Specifications
120 VAC: 18.7 A FLA, 120 A LRA; Pilot Duty 125 VA
208 VAC: 16.0 A FLA, 96.0 A LRA, 16.0 A non-inductive; Pilot Duty 125 VA
240 VAC: 9.2 A FLA, 55.2 A LRA, 9.2 A non-inductive; Pilot Duty 125 VA
208/240 VAC: 8.0 A FLA, 48.0 A LRA, 8.0 A non-inductive
Pilot Duty: 125 VA at 120–600 VAC; 57.5 VA at 120–300 VDC
Key Features
Compressor protection via automatic shutdown below setpoint
Sight-set calibration for precise field adjustment
Horizontal or vertical mounting on flat surfaces
36-inch capillary tube minimizes installation constraints
Typical Applications
Commercial refrigeration systems
Air conditioning systems
Pressure control for air, water, and oil applications
Compatibility & Integration
Compatible with R-12, R-22, R-134A, R-500, R-502, and other common non-corrosive refrigerants
Ammonia-compatible models available
Suitable for non-corrosive fluid applications
Specifications
| Parameter | Value |
|---|---|
| Voltage / Current Range | 120 VAC @ 18.7 A FLA |
Johnson Controls P70AB-2 — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Johnson Controls P70AB-2. Calibration covers I/O channel accuracy per specification, analog output and input calibration to rated accuracy, and functional communication interface test (serial, Ethernet, fieldbus). All calibrations ship with a NIST-traceable certificate. Turnaround is typically 1–3 business days after receipt.
Common Johnson Controls P70AB-2 faults: blown I/O fuses, failed analog modules, power supply capacitor failure. Common faults include blown I/O protection fuses, failed analog I/O modules, power supply capacitor failure, and serial or Ethernet communication port damage.
Johnson Controls P70AB-2 price
This Johnson Controls P70AB-2 is listed at $125. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Johnson Controls P70AB-2 calibration cost
NIST-traceable calibration for the Johnson Controls P70AB-2 is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Calibration for this instrument covers I/O channel accuracy per specification, analog output and input calibration to rated accuracy, and functional communication interface test (serial, Ethernet, fieldbus). Turnaround is 1 to 3 business days after receipt. See full calibration details →
