Johnson Controls A19ABC-44 Utility Thermostat 30067439-890 Always use a digital manometer

Always use a digital manometer to verify the final setting at operating temperature

or if the system cycles on and off rapidly (short-cycling)

verify the primary conductor frequency remains within the calibrated 50-60Hz window for accurate output

Specifically designed for duct insertion applications to maximize sensor accuracy

This wheel is designed for a 1/4-inch motor shaft

Johnson Controls A19ABC-44 Utility Thermostat 30067439-890 Always use a digital manometerThe Johnson Controls A19ABC 44 is a professional grade utility thermostat designed for precision temperature regulation in heavy duty HVACR applications. As an electromechanical temperature control, it features SPDT switching action, allowing for versatile wiring to either open or close a circuit on temperature risemaking it suitable for both heating and cooling equipment. This model is technically identical to the A19ABC 44C and operates across a 50