Johnson Controls A19ADB-11 Utility Thermostat

The Johnson Controls A19ADB-11 is a commercial-grade remote bulb temperature control designed for extreme high-temperature monitoring. This single-stage, manual reset thermostat is engineered to open the circuit on temperature rise, making it a critical safety limit for heating systems. Operating on multiple line voltages (120/208/240 VAC), it features a liquid-filled sensing element that ensures reliable performance across a broad 200°F to 550°F range. The 6-foot capillary provides necessary flexibility for HVAC high-limit control applications, while the .290" x 1.445" copper bulb allows for precise temperature sensing. As a direct equivalent to the A19ADB-11C, this unit offers veteran technicians a rugged, industrial utility thermostat solution with a user-friendly knob setpoint adjustment. For contractors needing a line voltage temperature switch that prevents automatic restarts after a high-limit event, the A19ADB-11 provides the necessary manual lockout protection required for industrial safety protocols.

• Manual Reset Safety: High-limit lockout ensures the system remains offline until a technician inspects the cause of the temperature spike.
• Wide Operating Range: Covers a broad spectrum from 200°F to 550°F, suitable for ovens, fryers, and high-heat industrial processes.
• Universal Voltage Compatibility: Field-ready for 120, 208, or 240 VAC applications without needing separate transformers.
• Precision Sensing: The 6-foot copper capillary and remote bulb allow for accurate monitoring even when the controller is mounted away from the heat source.
• Rugged Construction: Built by Johnson Controls for durability in demanding mechanical rooms and industrial environments.

Is the A19ADB-11 compatible with A19ADB-11C?
Yes, these two part numbers are identical in technical specification and performance; the "C" suffix typically denotes bulk or commercial packaging but does not change the form, fit, or function of the utility thermostat.

What is the switch action for this thermostat?
This is an "Open High" SPST switch. It breaks the electrical connection when the temperature reaches the setpoint, acting as a high-temperature cutout.

Does this unit reset itself when the temperature drops?
No, this model features a manual reset button. Once the high-limit setpoint is reached and the circuit opens, a technician must manually press the reset button to restore operation.

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.