Johnson Controls A19AAC-16 Utility Thermostat

The Johnson Controls A19AAC-16 Utility Thermostat is a heavy-duty, single-stage remote bulb temperature control engineered for precision in demanding HVACR environments. This SPDT thermostat (Single-Pole, Double-Throw) is designed to manage both heating and cooling applications, providing contractors with a versatile solution for industrial, farm, and commercial installations. Operating on 120/208/240 Vac, the unit features a broad 100 to 240 degree temperature range, making it ideal for high-limit or operating control in tanks, pipes, and ovens. The 10' capillary tube and Style 1 bulb allow for remote sensing in hard-to-reach locations, while the liquid-filled element ensures repeat accuracy regardless of ambient conditions. Built with a rugged NEMA 1 enclosure and a screwdriver range adjuster, the A19AAC-16—which is identical to the A19AAC-16C—offers reliable performance where process temperature control is critical. Its dust-tight, snap-acting contacts eliminate common failure points, streamlining HVAC system maintenance for service technicians.

• Universal Voltage Compatibility: Supports 120, 208, and 240 Vac for flexible field integration.
• Extended Reach: Equipped with a 10-foot copper capillary for remote sensing far from the control box.
• Dual-Action Switching: SPDT contact configuration allows for both high-limit and low-limit control logic.
• Precise Calibration: Features a screwdriver slot adjustment to prevent unauthorized setpoint tampering.
• Reliable Sensing: Utilizes a bulb style 1 liquid-filled element that remains unaffected by cross-ambient temperature shifts.

Common Questions

Is the A19AAC-16 suitable for both heating and cooling?
Yes, the SPDT (Single-Pole, Double-Throw) switch action allows you to wire the control to either "open on rise" for heating systems or "close on rise" for cooling and ventilation applications.

What is the difference between the A19AAC-16 and the A19AAC-16C?
These models are functionally identical. The "C" suffix typically denotes a commercial packaging or updated revision, but the technical specifications and mounting dimensions remain the same.

Can I use this thermostat for immersion applications?
Yes, but for closed tank or liquid immersion, it is recommended to use a compatible bulb well to protect the sensing element and facilitate replacement without draining the system.

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.