The Johnson Controls P100AA-3 is a reliable encapsulated pressure control designed for direct-mount installation in commercial and residential HVAC and refrigeration systems. Featuring an open-construction design with single-pole, single-throw (SPST) switching action, this control provides dependable high-side pressure protection with automatic reset functionality — eliminating the need for manual intervention after a pressure event.
How It Works
The P100AA-3 monitors system pressure and opens the circuit when pressure rises to 150 PSIG, protecting equipment from over-pressure conditions. Once system pressure recovers and climbs back to 225 PSIG, the control automatically resets and closes the circuit, restoring normal operation. The “Open Low” configuration means the switch opens on a pressure drop below the set point, making it ideal for low-pressure cutout applications.
Key Features
- Encapsulated construction for added durability and protection
- Direct-mount design for simplified installation
- SPST (Single-Pole, Single-Throw) switching action
- Open Low operation — opens on falling pressure
- Open construction allows for easy field inspection
- Automatic reset — no manual reset required after pressure event
- Opens at 150 PSIG; closes at 225 PSIG
- 120/240 Vac contact ratings for broad system compatibility
Specifications
- Brand: Johnson Controls
- Model / SKU: P100AA-3
- Control Type: Encapsulated Pressure Control
- Mounting: Direct Mount
- Switch Type: SPST (Single-Pole, Single-Throw)
- Action: Open Low
- Construction: Open
- Contact Voltage Rating: 120/240 Vac
- Open Set Point: 150 PSIG
- Close Set Point: 225 PSIG
- Reset Type: Automatic
Applications
The P100AA-3 is well-suited for use in commercial refrigeration systems, air conditioning equipment, and other HVAC applications requiring reliable pressure-based switching and automatic recovery. Its direct-mount configuration reduces installation complexity, while the encapsulated body protects internal components from environmental contaminants.
