Johnson Controls P20EB-1 Pressure Control

The Johnson Controls P20EB-1 Pressure Control is a versatile field replacement engineered for low-pressure cutout applications in residential and commercial air conditioning systems. This mechanical refrigeration pressure switch operates within a range of 7 to 150 PSI and features a 36-inch capillary with a 1/4-inch sweat connection for flexible mounting. Designed with a Single Pole Double Throw (SPDT) switch action, this unit provides reliable automatic reset performance, opening on pressure drop and closing as pressure rises. As a veteran-grade HVAC pressure control, the P20EB-1 serves as the direct replacement for the P20AA-127 and the P20EB-18 (noting the 36" capillary length versus the 48" of the -18C model).

Built for durability in demanding environments, the P20EB-1 includes a dust-tight contact unit and a compact NEMA 1 enclosure. It is compatible with all non-corrosive refrigerants and supports a wide variety of HVACR technical specifications, including a 30 PSI fixed differential and a maximum bellows pressure of 250 PSI. The screwdriver-adjustable range allows for precise field tuning to match OEM requirements, ensuring the P20EB-1 air conditioning control maintains system safety and compressor longevity by preventing operation under low-charge conditions.

• Universal Replacement: Directly replaces legacy models including P20AA-127, Ranco G20-4050, and Honeywell P431X-1092.
• Compact Footprint: Slim profile design at less than the size of a cigarette pack, ideal for tight cabinet installations.
• Robust Switching: Heavy-duty SPDT contacts rated for up to 16 FLA at 120 VAC, providing reliable pilot duty or direct motor control.
• Ease of Installation: Includes a universal mounting bracket and quick-connect terminals for rapid field service.
• Environmental Protection: Features a stainless steel power lever and dust-tight internal enclosure to prevent contact fouling.

What is the difference between the P20EB-1 and the P20EB-18?
The primary difference is the capillary length. The P20EB-1 features a 36-inch capillary, while the P20EB-18 (or -18C) typically comes with a longer 48-inch capillary. Mechanically and electrically, they are identical.

How do you adjust the pressure setpoints on this control?
The cutout point is adjusted via a range screw located at the top of the unit. One complete counter-clockwise turn typically lowers the setting by approximately 20 PSI in the low-pressure range.

Can this be used with R-410A systems?
Yes, the P20EB-1 is compatible with R-410A and other non-corrosive refrigerants, provided the operating pressures fall within the 7 to 150 PSI range and do not exceed the 250 PSI bellows limit.

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.