Johnson Controls P70BA-1 Pressure Control

The Johnson Controls P70BA-1 Pressure Control is a heavy-duty single pole low pressure control engineered for critical cut-out and pump-down applications in commercial refrigeration. Built with a rugged all-steel case and cover, this SPST pressure switch offers a versatile operating range of 20" Hg to 100 psi, ensuring reliable performance across a variety of non-corrosive refrigerants. The integrated 36" capillary tube with a 1/4" flare nut provides the flexibility needed for secure mounting in tight mechanical spaces. Designed for high-stakes HVACR system protection, this manual reset pressure control triggers an "open low" action to force a hard shutdown when sub-atmospheric or dangerously low pressures are detected. This "trip-free" safety mechanism prevents the system from automatically restarting, requiring a technician to inspect the cause before resuming operation. Professional-grade Sight-Set calibrated scales allow for accurate setpoint adjustments without removing the enclosure, making it a staple for contractors prioritizing efficient commercial refrigeration pressure management.

• Enhanced Equipment Safety: The manual reset lockout prevents rapid short-cycling and equipment damage after a low-pressure event.
• Durable Construction: Features an all-steel housing that stands up to the vibration and harsh environments of commercial mechanical rooms.
• Precision Adjustment: Includes "Sight-Set" visible scales for rapid, accurate configuration of cut-in and cut-out points.
• Universal Compatibility: Works seamlessly with most non-corrosive refrigerants, air, and water systems.
• Flexible Installation: The 36-inch capillary tube simplifies mounting away from high-vibration compressor tap points.

Can the manual reset be bypassed?
No. The P70BA-1 utilizes a trip-free reset mechanism, meaning the contacts cannot be forced closed by holding or taping down the reset button.

What is the primary application for an Open Low switch?
This low pressure cut-out is typically used for pump-down control or as a safety limit to protect the compressor from operating without a proper refrigerant charge.

Is this model compatible with ammonia systems?
This specific model is designed for non-corrosive refrigerants. For ammonia applications, a dedicated ammonia-compatible P70 series must be utilized to prevent component 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.