Johnson Controls A19BAC-15 Utility Thermostat

The Johnson Controls A19BAC-15 is a professional-grade utility thermostat engineered for precise temperature regulation in demanding environments. This single-stage, SPDT temperature control features a stainless steel coiled sensing element, offering rapid response to ambient air changes while providing superior corrosion resistance. With a versatile 30/110 degrees temperature range and a 3.5 fixed differential, this unit ensures reliable operation for agricultural ventilation, livestock barns, and industrial space heating or cooling applications. Designed for maximum flexibility, the A19BAC-15 supports 120/208/240 Vac electrical configurations, facilitating seamless integration into existing service projects. The automatic reset functionality and intuitive knob setpoint adjustment streamline field calibration, allowing technicians to maintain tight control parameters without frequent manual intervention. Built on the rugged PENN A19 series platform, this mechanical temperature controller provides high-capacity switching performance (up to 16.0 Full Load Amps at 120V) without the need for external power, making it a staple for line-voltage control in harsh conditions.

• Broad Compatibility: Supports multiple voltages (120/208/240 Vac) for heating, cooling, and ventilation circuits.
• Durable Sensing: The stainless steel coiled sensing element is specially treated to withstand corrosive atmospheres typical in agricultural and industrial settings.
• Simplified Installation: SPDT switch action allows for "open-high" or "close-high" wiring, accommodating both cooling and heating equipment.
• Reduced Downtime: Automatic reset and fixed differential minimize cycles and prevent unnecessary equipment wear.
• Rugged Enclosure: NEMA 1 rated construction protects internal components from mechanical damage in high-traffic service areas.

Can the A19BAC-15 be used for both heating and cooling?
Yes. The SPDT (Single-Pole, Double-Throw) internal switch allows for terminal wiring that can either break the circuit on temperature rise (heating) or make the circuit on temperature rise (cooling/ventilation).

Is the sensing element suitable for direct immersion?
No. The coiled element on the A19BAC-15 is specifically designed for ambient air temperature sensing. For liquid immersion or remote bulb applications, a capillary-style A19 model should be utilized.

Does this unit require a separate power source?
No. As a mechanical utility thermostat, it operates via a liquid-filled element that expands and contracts to mechanically trigger the switch, requiring no control voltage or batteries for the logic to function.

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.