Johnson Controls T22JAA-1 Thermostat

The Johnson Controls T22JAA-1 is a commercial-grade line voltage wall thermostat engineered specifically for heavy-duty cooling applications. This robust SPST cooling thermostat provides precise temperature control for fans, motors, and cooling equipment across a 40°F to 90°F range. Featuring a fixed 2-1/4°F differential, it ensures stable cycling and prevents short-cycling of refrigeration compressors or exhaust fans. The intuitive knob adjustment and integrated Off-Auto selector switch allow for straightforward manual override and system management in industrial or mechanical room environments. Designed for durability, the T22JAA-1 serves as the direct replacement for 151-6, fitting standard single-gang electrical boxes without requiring complex recalibration. For contractors handling HVAC line voltage controls, this unit offers a reliable, low-maintenance solution for high-amperage cooling loads where low-voltage control circuits are not utilized.

• Direct Replacement Logic: Specifically designed to replace the 151-6 model, ensuring seamless integration into existing mounting configurations.
• Wide Setpoint Range: Manages cooling environments from 40 to 90 degrees Fahrenheit, ideal for walk-in coolers and equipment rooms.
• High Amperage Capacity: Rated for line voltage (120/240 VAC) applications, eliminating the need for a separate transformer in cooling loops.
• Rugged SPST Contact: Provides a single-pole, single-throw break-on-rise action for dependable inductive load switching.

Common Questions Regarding the T22JAA-1

Can the T22JAA-1 be used for heating applications?
No, this unit is a "break-on-rise" SPST controller specifically for cooling. For heating, a "make-on-rise" or SPDT thermostat is required.

What is the purpose of the 2-1/4 degree differential?
The fixed differential prevents the system from hunting or rapid cycling, protecting the compressor motor from overheating during high-demand periods.

Does this thermostat require a separate subbase?
The T22JAA-1 is a self-contained unit designed for wall mounting over a standard conduit box, making it ideal for retrofitting older line voltage systems.

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.