Johnson Controls A19ABC-44 Utility Thermostat

The Johnson Controls A19ABC-44 is a professional-grade utility thermostat designed for precision temperature regulation in heavy-duty HVACR applications. As an electromechanical temperature control, it features SPDT switching action, allowing for versatile wiring to either open or close a circuit on temperature rise—making it suitable for both heating and cooling equipment. This model is technically identical to the A19ABC-44C and operates across a 50 to 200 degree temperature range. The integrated 20-foot capillary length and remote bulb sensing element provide the flexibility needed for remote monitoring in walk-in coolers, display cases, or industrial tanks. With an adjustable differential of 6 to 24 degrees, technicians can fine-tune cycling to prevent short-cycling and equipment wear. Built for reliable line voltage operation at 120, 208, or 240 Vac, this Johnson Controls A19 series unit includes an automatic reset and a user-friendly knob setpoint adjustment for rapid field calibration.

Key Benefits

• Versatile Application: The SPDT (Single-Pole, Double-Throw) configuration supports both "make-on-rise" and "break-on-rise" logic for dual-purpose use.
• Extended Reach: A 20' capillary length enables the control box to be mounted in an accessible location while the remote bulb monitors distant or hard-to-reach zones.
• Customizable Cycling: The adjustable differential (6/24 degrees) allows for tighter control or wider swings depending on the thermal mass of the application.
• Multi-Voltage Compatibility: Universal electrical ratings (120/208/240 Vac) simplify stocking requirements for varied service calls.
• Field Reliability: The A19ABC-44 provides consistent automatic reset operation without the need for manual intervention after a temperature excursion.

Common Questions

Is the A19ABC-44 compatible with heating or cooling systems?
Yes, the SPDT switch allows you to wire the common terminal to either the Normally Open (NO) or Normally Closed (NC) side, making it compatible with both heating and cooling sequences.

What is the difference between the A19ABC-44 and the A19ABC-44C?
These parts are functionally identical. The "C" suffix typically denotes a commercial packaging or localized revision for specific distribution channels, but the technical specifications and terminal configurations remain the same.

Can the capillary be cut to a shorter length?
No, never cut the 20-foot capillary. It is a sealed system liquid-filled sensing element; cutting it will release the charge and render the thermostat inoperable.

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.