Johnson Controls A70GA-2 Temperature Control

The Johnson Controls A70GA-2 Temperature Control is a heavy-duty, single-stage thermostat designed for both refrigeration and heating applications. This SPST open-low control features an adjustable range of 35°F to 80°F, making it a versatile solution for walk-in coolers and space heating systems. Built with a 6-foot capillary for flexible bulb placement, the A70GA-2 offers reliable automatic reset functionality to maintain precise thermal regulation. Operating on 120-240 VAC, the unit includes a 1/2-inch conduit opening for standard electrical fitment and a reverse acting auxiliary contact to signal secondary equipment or alarms upon temperature deviation. This HVAC mechanical thermostat is engineered to withstand the rigors of commercial environments, providing consistent performance where electronic controls might fail. For contractors seeking a rugged Johnson Controls replacement temperature switch, the A70GA-2 ensures compatibility with high-amperage loads without requiring additional relays in many standard configurations.

Key Benefits

• Broad Application Range: Rated for 120/240 VAC, making it suitable for a variety of refrigeration and heating tasks.
• Enhanced System Feedback: Includes a reverse-acting auxiliary contact for integrated system monitoring.
• Simplified Installation: The 6-foot capillary length allows for remote sensing in hard-to-reach evaporators or ducts.
• Durable Construction: Built with a NEMA 1 enclosure to protect internal components from debris and mechanical damage.

Common Questions

What is the difference between open-high and open-low actions on this control?
The A70GA-2 is an open-low control, meaning the main contacts break the circuit when the temperature drops to the setpoint, typically used to cycle compressors or heaters off to prevent over-cooling or over-heating.

Can this unit be used in high-moisture environments?
While the A70GA-2 features a robust 1/2-inch conduit opening, it is rated for NEMA 1 indoor use. For wash-down areas, ensure it is mounted within a secondary weather-tight enclosure.

Is the differential fixed or adjustable?
The A70 Series typically features a fixed differential designed to prevent short-cycling of commercial HVACR equipment while maintaining tight setpoint tolerances.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.