Johnson Controls A19AAD-12 Temperature Control

The Johnson Controls A19AAD-12 is a precision-engineered mechanical temperature control designed for demanding HVACR environments. This remote bulb temperature control is specifically built for low-temperature applications, featuring a setpoint range of -30 to 50?F. As a veteran-grade SPDT thermostat, it provides reliable automatic reset functionality for single-stage heating or cooling operations. The A19AAD-12 is technically identical to the A19AAD-12C model, ensuring a seamless drop-in replacement for existing Johnson Controls A19 series installations in walk-in coolers, beverage dispensers, and frozen food cases.

For high-accuracy performance, this controller utilizes a liquid-filled sensing element, providing consistent repeat accuracy that remains unaffected by barometric pressure or cross-ambient conditions. The 7-foot copper capillary and 3/8" x 4" bulb offer flexible mounting for remote sensing. A screwdriver slot range adjuster allows for secure setpoint calibration, while the 2.5?F fixed differential is case-compensated to maintain tight temperature regulation across the entire operating range.

• Universal Voltage Compatibility: Rated for 24 to 277Vac, simplifying inventory for diverse site requirements.
• Rugged NEMA 1 Enclosure: Provides a durable, dust-protected housing for standard indoor commercial applications.
• Precision Switching: Features a heavy-duty SPDT switch for versatile "open high" or "open low" wiring configurations.
• Case-Compensated Differential: Ensures the 2.5?F fixed differential stays accurate regardless of ambient temperature fluctuations around the control box.
• Extended Reach: The 7' capillary length allows for strategic bulb placement in deep evaporators or difficult-to-reach sensing zones.

• Can this replace the A19AAD-12C? Yes, the A19AAD-12 is the direct equivalent and identical in specifications to the 12C variant.
• What is the maximum bulb temperature? This unit is rated for infrequent exposure up to 140?F, ideal for standard shipping and storage conditions.
• Does this require a bulb well for liquid immersion? For sensing in tanks or pressurized lines, use the FTG13A-600R packing nut or a compatible bulb well to protect the capillary.

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.