Description
The Johnson Controls A70HA-2 is a rugged, single-pole temperature control engineered for demanding refrigeration and heating applications. With a wide 120–240 Vac operating voltage range and a 35°F to 80°F temperature sensing range, this control delivers reliable, precise switching across a broad spectrum of commercial and industrial environments. Its open-on-rise (Open Low) action, combined with a reverse-acting auxiliary contact, makes it well suited for systems that require fail-safe or complementary control logic.
The A70HA-2 features a lockout with manual reset function, providing an added layer of equipment protection by preventing automatic restart after a fault condition — a critical safety feature in refrigeration and heating systems. The 6-foot capillary length allows flexible sensor placement, while the 1/2-inch conduit opening ensures clean, code-compliant wiring installation.
Key Features
- Operating Voltage: 120–240 Vac
- Temperature Range: 35°F to 80°F
- Switch Action: Single Pole, Open Low (opens on temperature rise)
- Reverse Acting Auxiliary Contact included
- Lockout with Manual Reset for enhanced equipment protection
- Capillary Length: 6 feet for flexible sensor positioning
- Conduit Opening: 1/2 inch for standard wiring connections
- Suitable for refrigeration and heating applications
Applications
- Commercial refrigeration systems
- Heating equipment and boiler controls
- Industrial temperature monitoring and control
- Any application requiring manual-reset lockout protection
Why Choose the Johnson Controls A70HA-2?
Johnson Controls is a globally recognized leader in building and HVAC controls, and the A70HA-2 reflects that legacy of quality. The manual reset lockout ensures technicians must physically intervene before a system restarts after a fault, reducing the risk of equipment damage or unsafe operating conditions. The reverse-acting auxiliary contact adds versatility for complex control schemes, making this unit a go-to choice for HVAC/R professionals who demand reliability and flexibility in a single compact package.
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