Description
The Johnson Controls A70HA-1 is a robust, single-pole temperature control engineered for demanding refrigeration and heating applications. Featuring a wide operating voltage range of 120–240 Vac, this versatile controller adapts to a broad range of commercial and industrial system configurations without the need for additional transformers or step-down devices.
Precision Temperature Management
The A70HA-1 operates across a 15°F to 55°F temperature range, making it well-suited for refrigeration cases, coolers, and low-temperature heating systems. The unit ships with a 20-foot capillary tube, providing the installation flexibility needed to remotely sense temperature in hard-to-reach locations or large enclosures.
Safety & Control Features
Built with operator safety and system protection in mind, the A70HA-1 includes a lockout with manual reset function. This feature ensures that once a fault condition is detected, the system will not automatically restart — requiring deliberate manual intervention before resuming operation. This prevents equipment damage and protects personnel from unexpected restarts.
The Open Low (reverse acting) switching configuration and the included reverse acting auxiliary contact make this control ideal for applications where the circuit must open on a temperature drop, such as refrigeration lockout and freeze protection scenarios.
Key Specifications
- SKU: A70HA-1
- Brand: Johnson Controls
- Voltage: 120–240 Vac
- Switch Type: Single Pole
- Action: Open Low (Reverse Acting)
- Temperature Range: 15°F to 55°F
- Capillary Length: 20 feet
- Conduit Opening: 1/2 inch
- Reset Type: Lockout with Manual Reset
- Auxiliary Contact: Reverse Acting
- Applications: Refrigeration and Heating
Applications
- Commercial refrigeration systems and walk-in coolers
- Low-temperature heating and freeze protection
- HVAC equipment requiring remote temperature sensing
- Systems requiring manual reset lockout for safety compliance
Why Choose the Johnson Controls A70HA-1?
Johnson Controls is a globally recognized leader in building controls and HVAC solutions. The A70HA-1 reflects their commitment to reliability, safety, and precision — delivering consistent performance in commercial and light industrial environments. The 1/2″ conduit opening simplifies wiring integration into standard electrical enclosures, while the long capillary tube ensures accurate remote sensing without compromising installation flexibility.
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