Johnson Controls A19AAD-26 Utility Thermostat

The Johnson Controls A19AAD-26 Utility Thermostat is a heavy-duty, single-stage temperature control designed for reliable performance in demanding HVACR environments. This remote bulb thermostat features a 30?F to 90?F temperature range, making it ideal for refrigeration control, space heating, and general-purpose industrial applications. Built with a 6-foot copper capillary and a 3/8" x 1-1/2" sensing bulb, the A19AAD-26 provides accurate thermal response and is identical to the A19AAD-26C model often found in wholesale catalogs. The SPST switch action is designed to open on temperature rise, providing a dependable line voltage thermostat solution for 120V, 208V, or 240V AC circuits. The unit includes a screwdriver range adjuster and a concealed scale to prevent unauthorized tampering with setpoints, while the automatic reset functionality ensures continuous operation without manual intervention after a cycle. For contractors looking for a rugged, field-proven mechanical temperature controller, this Penn series component offers the stability required for commercial walk-ins and ventilation systems.

• Universal Voltage Compatibility: Rated for 120/208/240 Vac, allowing for seamless integration into various power systems.
• Tamper-Resistant Design: The screwdriver range adjuster prevents end-user adjustments, maintaining system calibration.
• Durable Construction: Features a liquid-filled 6' capillary length and copper bulb for rapid and precise temperature sensing.
• Compact NEMA 1 Enclosure: Simplifies mounting in tight mechanical stands or control panels.
• Field-Proven Reliability: Part of the trusted Johnson Controls Penn A19 Series, known for longevity in high-cycle applications.

What is the difference between the A19AAD-26 and A19AAD-26C?
These models are functionally identical. The "C" suffix typically denotes a commercial packaging or high-volume SKU used by specific distributors, but the technical specifications and performance remain exactly the same.

Can this thermostat be used for cooling applications?
This specific model features SPST (Single-Pole Single-Throw) contacts that open on temperature rise, which is standard for heating or high-limit applications. For cooling applications requiring a close-on-rise action, verify your wiring requirements or consider an SPDT alternative from the A19 series.

Is the differential adjustable on this model?
The A19AAD-26 is designed with a fixed differential to ensure consistent cycling and prevent "short cycling," which is critical for protecting compressor motors and heating elements.

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.