Johnson Controls P70DA-1 High Pressure Control Switch
The Johnson Controls P70DA-1 is a heavy-duty high-pressure safety switch engineered for reliable refrigeration and HVAC system protection. Designed to open on a pressure rise (OPEN-HI), this manual-reset control safeguards compressors and refrigerant circuits by interrupting the circuit when system pressure exceeds the set point — requiring a deliberate manual reset before the system can restart. This fail-safe design helps prevent repeated compressor cycling under fault conditions, protecting equipment and extending service life.
Key Features
- Pressure range: 50 to 450 PSI
- Manual reset (M/R) operation — requires intentional reset after trip for added safety
- Opens on high-pressure rise (OPEN-HI) — functions as a high-pressure cutout
- 36-inch capillary sensing tube for flexible installation
- Rugged construction suitable for demanding commercial and industrial refrigeration applications
- Designed for use with common refrigerants in HVAC and refrigeration systems
Application
The P70DA-1 is ideal for use as a high-pressure safety control on refrigeration compressors, condensing units, and commercial HVAC equipment. The manual reset feature ensures that a technician must physically inspect and address the cause of the high-pressure trip before the system is allowed to restart, making it well-suited for critical equipment protection.
Specifications
- Brand: Johnson Controls
- SKU / Part Number: P70DA-1
- Pressure Range: 50–450 PSI
- Reset Type: Manual Reset
- Switch Action: Opens on Pressure Rise (High-Pressure Cutout)
- Capillary Length: 36 inches
- Series: P70
