Description
The Johnson Controls A19AAD-26 is a rugged, line-voltage utility thermostat engineered for reliable temperature control across a wide range of commercial and industrial HVAC applications. Designed to operate on 120, 208, or 240 VAC power supplies, this thermostat offers broad installation flexibility without the need for additional transformers or step-down components.
Temperature Control & Sensing
- Temperature range: 30°F to 90°F — ideal for freeze protection, ventilation control, and unit heater applications
- 6-foot capillary length provides flexible bulb placement away from the control body
- 3/8″ x 1-1/2″ sensing bulb for accurate, responsive temperature detection
- Automatic reset returns the thermostat to normal operation once the setpoint condition is satisfied
Electrical Specifications
- Voltage: 120/208/240 VAC — multi-voltage compatibility for versatile wiring configurations
- Switch type: SPST (Single-Pole, Single-Throw) for straightforward on/off control
Adjustment & Usability
- Screwdriver range adjuster allows secure, tamper-resistant setpoint calibration
- Compact, durable housing suitable for surface or panel mounting in demanding environments
Typical Applications
- Unit heaters and cabinet heaters
- Freeze protection systems
- Ventilation and exhaust fan control
- Commercial refrigeration and cold storage monitoring
- Industrial process temperature switching
The A19AAD-26 combines proven Johnson Controls sensing technology with a straightforward installation profile, making it a dependable choice for contractors and facility managers who need accurate, low-maintenance line-voltage temperature control.
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