The Johnson Controls P100AP-358 is a direct-mount, encapsulated pressure control engineered for reliable system protection in commercial and industrial HVAC and refrigeration applications. With its open construction design and automatic reset functionality, this control delivers dependable pressure-based switching without the need for manual intervention after a pressure event.
How It Works
The P100AP-358 operates as a Single-Pole, Single-Throw (SPST) switch that opens on a pressure drop. When system pressure falls to 75 PSIG, the contacts open to interrupt the circuit and protect connected equipment. Once pressure recovers and reaches 100 PSIG, the contacts automatically close, restoring normal operation — no manual reset required.
Key Specifications
- SKU / Part Number: P100AP-358
- Brand: Johnson Controls
- Control Type: Encapsulated Pressure Control
- Mounting Style: Direct Mount
- Switch Configuration: SPST (Single-Pole, Single-Throw)
- Action: Opens on Pressure Drop
- Construction: Open Construction
- Contact Voltage Rating: 120/240 Vac
- Open (Cut-Out) Set Point: 75 PSIG
- Close (Cut-In) Set Point: 100 PSIG
- Reset Type: Automatic Reset
Features & Benefits
- Encapsulated design protects internal components from moisture and contaminants
- Direct-mount configuration simplifies installation and reduces field labor
- Automatic reset eliminates the need for manual intervention after a pressure event
- SPST switching provides straightforward, reliable circuit control
- 120/240 Vac contact ratings offer broad compatibility with common HVAC control circuits
- Open construction allows for easy inspection and field serviceability
- Precise cut-out and cut-in pressure points (75 PSIG / 100 PSIG) ensure consistent equipment protection
Typical Applications
- Commercial refrigeration systems
- HVAC compressor protection circuits
- Chiller and condensing unit controls
- Industrial process pressure monitoring
- Low-pressure safety cutout applications
