Johnson Controls P70LB-6 Pressure Control

The Johnson Controls P70LB-6 is a professional-grade Dual Pressure Control engineered specifically for high-stakes commercial refrigeration and air conditioning environments. As a combined high and low pressure regulator, the P70LB-6C utilizes MICRO-SET technology to provide precise cutoff and cut-in points, ensuring your compressor operates within optimal parameters. This specific model features a high side adjustment range of 100 PSI to 425 PSI and a low side range of 12" Hg to 80 PSI. Built with a durable NEMA 1 Enclosure and an all-steel case, this HVAC pressure switch is designed for longevity in mechanical rooms. The 36" capillary with a 1/4" flare nut allows for flexible mounting, while the SPST switch action provides reliable automatic reset functionality for unmonitored systems. Whether you are managing head pressure or preventing evaporator freeze-up, the included adjustment knob enables rapid, accurate setpoint calibration for various non-corrosive refrigerants.

• Direct Compressor Control: The high-capacity SPST contacts are rated for direct control of AC motors in commercial applications.
• Precision Calibration: Features sight-set calibrated pressure scales, allowing technicians to verify settings without external gauges.
• Refrigerant Versatility: Fully compatible with common non-corrosive refrigerants including R-12, R-22, R-500, and R-502.
• Simplified Installation: The 3-foot 36-inch capillary tube provides the reach needed for complex piping layouts.
• Heavy-Duty Construction: The robust steel housing and cover protect internal components from physical damage in high-traffic areas.

What is the difference between the P70LB-6 and P70LB-6C?
The "C" suffix typically denotes the commercial packaging or specific distribution channel, but the technical specifications, including the 100-425 PSI high side and 12"-80 PSI low side ranges, remain identical for the P70LB-6 series.

Does this unit require a manual reset after a high-pressure trip?
No, this model is an automatic reset control. It will restore the circuit once the system pressure returns to the differential setpoint, making it ideal for systems where manual intervention is not always feasible.

Can I use the P70LB-6 with ammonia systems?
Standard P70 models are designed for non-corrosive refrigerants. For ammonia applications, you must specify an ammonia-compatible model that features the appropriate bellows material to prevent corrosion.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.