Johnson Controls A70HA-1 Temperature Control

Temperature Control, 120-240 Vac, Single Pole, Open Low, 15/55 Degree Temperature Range, 20' Capillary Length, 1/2" Conduit Opening, Lockout with Manual Reset, For Refrigeration and Heating, Reverse Acting Auxiliary Contact

A70HA-1 is the direct replacement for 2284-900, A19AAC-1

Johnson Controls A70HA-1 Temperature Control – 15°F to 55°F Range, Manual Reset, 20' Capillary, SPDT, 120/240V

The Johnson Controls A70HA-1 Temperature Control is a rugged, reliable low-temperature limit control designed for commercial refrigeration and heating systems. This manual reset, reverse acting temperature controller is ideal for applications requiring a safety lockout on temperature drop, making it perfect for critical systems that demand protection from freezing or overcooling.

🔧 Key Features:

• Model: A70HA-1

• Type: Low Limit Temperature Control

• Setpoint Range: 15°F to 55°F (-9°C to 13°C)

• Factory Stop: 35°F (1.7°C)

• Differential: ~5°F (non-adjustable)

• Reset Type: Manual reset with lockout

• Capillary Length: 20 ft (6.1 m), vapor pressure element

• Electrical Ratings: 120/240 VAC, SPDT (1 NO / 1 NC)

• Conduit Opening: 1/2"

• Display Type: Mechanical

• Auxiliary Contact: Reverse acting – main contacts open and auxiliary contacts close on temperature drop

• Overrun Temperature: Max 400°F (204°C)

✅ Benefits:

• Accurate mechanical temperature control

• Long-life, snap-acting switch contacts

• Ideal for walk-in coolers, freezers, and HVAC systems

• Manual reset provides added protection and prevents automatic restart

• Easy-to-adjust setpoint for reliable temperature control

⚙️ Applications:

• Commercial refrigeration units

• Low-temperature HVAC systems

• Freeze protection systems

• Heating systems with safety shutoff requirements

Protect your refrigeration and heating systems with the Johnson Controls A70HA-1 – a dependable, manual reset low-limit temperature control engineered for safety, performance, and longevity.