Johnson Controls A19ABC-39 Utility Thermostat

The PENN Johnson Controls A19ABC-39 is a heavy-duty utility thermostat built for versatile temperature regulation in commercial HVACR applications. This single-stage temperature control features a liquid-filled sensing element with a .290-inch by 2.573-inch immersion bulb, making it ideal for direct immersion in tanks or pipes. The unit operates on 120/208/240 Vac and provides a reliable SPDT switch action, allowing for either heating or cooling control. With a 30?F to 180?F temperature range and an adjustable differential of 6?F to 24?F, technicians can fine-tune system cycling to prevent short-cycling and ensure equipment longevity. The A19ABC-39 includes a bulb well for easy installation and features automatic reset with a screwdriver adjustment for secure setpoint management. This model is functionally identical to the A19ABC-39C, ensuring seamless utility thermostat replacement for existing Penn or Johnson Controls installations.

• Broad Voltage Compatibility: Supports 120/208/240 Vac electrical systems for universal field application.
• Adjustable Differential: Field-adjustable 6/24 degree differential allows for precise control over equipment cycle rates.
• Durable Sensing Element: Features a high-quality immersion bulb and capillary for accurate thermal response in liquid applications.
• Rugged Construction: Encased in a NEMA 1 enclosure, designed to withstand the rigors of mechanical rooms and industrial environments.
• Secure Setpoints: Utilizes screwdriver adjustment to prevent unauthorized or accidental setpoint changes.

• Can this be used for both heating and cooling? Yes, the A19ABC-39 features SPDT contacts (Single Pole Double Throw), allowing it to open or close a circuit on temperature rise, making it suitable for both heating and cooling utility applications.
• Is the bulb well included with this model? Yes, this specific part number includes the immersion well, facilitating direct sensing of liquid temperatures in boilers, water heaters, or storage tanks.
• What is the difference between A19ABC-39 and A19ABC-39C? The units are identical in technical specifications and performance; the "C" suffix typically denotes retail or specific packaging but does not change the HVAC thermostat functionality.

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.