Johnson Controls A19ABC-41 Utility Thermostat

The Johnson Controls A19ABC-41 Utility Thermostat is a high-performance, single-stage electromechanical temperature control engineered for industrial and commercial HVACR applications. This line voltage mechanical thermostat operates using a liquid-filled, copper hydraulic capillary bulb, ensuring high repeat accuracy that remains unaffected by barometric pressure or cross-ambient temperature shifts. Designed for flexibility, the A19ABC-41 features SPDT (Single-Pole, Double-Throw) contacts, making it suitable for both heating and cooling equipment such as display cases, beverage coolers, and greenhouse ventilation systems. The unit includes an 8-foot capillary length for remote sensing and supports 120/208/240 VAC field wiring. With a temperature range of -35?C to 40?C (-30?F to 104?F) and a fixed 6?F differential, this controller provides stable automatic reset operation. The A19ABC-41 is identical to A19ABC-41C, typically including a front-mounted adjustment knob and a NEMA 1 steel enclosure for rugged field use.

Key Benefits:

• Versatile Compatibility: The SPDT switch action allows for "open high" or "open low" wiring, accommodating a wide variety of refrigeration and heating loads.
• Remote Sensing Precision: Features an 8-foot remote bulb sensor with a 3/8" x 4" bulb, enabling accurate temperature monitoring in hard-to-reach locations.
• No Power Required: As an electromechanical A19 Series temperature control, it operates without external power, increasing reliability in remote utility environments.
• Rugged Construction: Built with a NEMA 1 enclosure to protect internal snap-acting contacts from dust and environmental debris.
• Field Adjustable: Includes a front-facing adjustment knob and mounting screws for rapid setpoint calibration during installation.

Common Questions:

What is the difference between the A19ABC-41 and the A19ABC-41C?
Technically, the A19ABC-41 is identical to A19ABC-41C; the "C" suffix typically denotes individual packaging or a specific regional distribution code, but the electrical ratings and thermal specifications are the same.

Can this thermostat be used in wet or outdoor environments?
The standard A19ABC-41 comes with a NEMA 1 enclosure intended for indoor use. For washdown or high-moisture applications, a NEMA 4X rated enclosure would be required.

How do the SPDT contacts handle different loads?
The red (common) to yellow contacts close on temperature rise (cooling), while the red to blue contacts open on rise (heating). This allows the mechanical temperature control to manage fans, compressors, or heaters depending on your wiring configuration.

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.