The Johnson Controls P70DA-2 is a single-pole, single-throw (SPST) high pressure control engineered specifically for ammonia refrigeration systems. Designed with an open-on-rise, close-on-fall action, this control provides reliable high-side pressure protection with a manual reset lockout feature that requires a deliberate operator reset before the system can restart — helping prevent repeated short-cycling and protecting equipment from sustained overpressure conditions.
Key Features
- Open High / Close Low switching action for high-pressure cutout applications
- SPST (Single Pole, Single Throw) configuration
- Manual reset lockout — requires manual reset after trip for added safety
- Designed and rated for use with ammonia (R-717) refrigerant
- 1/4″ Female NPT pressure connector for straightforward field installation
- Durable construction suitable for demanding industrial refrigeration environments
Specifications
- Control Type: High Pressure Control
- Switching Action: Open High, Close Low (SPST)
- Pressure Range: 50 PSI to 450 PSI
- Maximum Overpressure: 525 PSIG
- Reset Type: Manual Reset (Lockout)
- Pressure Connection: 1/4″ Female NPT
- Refrigerant Compatibility: Ammonia (R-717)
- SKU: P70DA-2
- Brand: Johnson Controls
Application
The P70DA-2 is ideal for industrial and commercial ammonia refrigeration systems where high-side pressure monitoring and safety cutout are critical. The wide 50–450 PSI operating range and 525 PSIG maximum overpressure rating make it suitable for a broad range of ammonia system configurations. The manual reset lockout ensures that a technician must evaluate and clear the fault condition before the system resumes operation, providing an important layer of protection for both equipment and personnel.
