Johnson Controls A19ABC-2 Utility Thermostat

The Johnson Controls A19ABC-2 Utility Thermostat is a versatile SPDT electromechanical temperature control designed for heavy-duty applications in the refrigeration, heating, and air conditioning sectors. Built for reliability, this unit features a liquid-filled sensing element that provides a rapid and accurate response to temperature fluctuations, ensuring consistent ambient temperature control. With a voltage rating of 120/208/240 Vac and a temperature range of 20 to 80 degrees Fahrenheit, it serves as an ideal universal replacement thermostat for diverse equipment including beverage coolers, milk coolers, and industrial heating systems. The 6-foot capillary length allows for flexible remote sensing, while the adjustable differential (3.5 to 14?F) enables technicians to fine-tune cycling to meet specific load requirements. The rugged NEMA 1 enclosure protects internal components, and the automatic reset functionality ensures continuous operation without manual intervention after a temperature stabilization event.

Key Benefits for Contractors:

• Universal Application Range: Optimized for open high / open low switching, making it a go-to stock item for various service calls.
• Precise Field Calibration: Features a knob adjustment and visible scale for straightforward setpoint configuration on-site.
• Durable Construction: The dust-protected snap-acting contacts prevent premature wear in demanding mechanical environments.
• Flexible Mounting: Compatible with bulb wells and packing nut assemblies for immersion or closed-tank installations.
• High Electrical Capacity: Rated for up to 10.0 Amps at 120V, handling standard motor loads and pilot duty circuits with ease.

Common Questions & Answers:

How do I wire this for heating vs. cooling?
As a Single-Pole, Double-Throw (SPDT) control, use the Red (Common) and Blue terminals to open on temperature rise (cooling/refrigeration) or the Red and Yellow terminals to close on temperature rise (heating).

Can the differential be adjusted while the system is live?
The adjustable differential can be set by moving the internal lever; however, the cover must be removed, and safety protocols for 120/240 Vac circuits must be followed by a qualified technician.

Is this suitable for immersion in liquid tanks?
Yes, this model is frequently used for liquid immersion. For high-pressure or fluid-containment applications, it should be paired with a compatible 1/2-inch NPT bulb well to protect the capillary bulb.

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.