Johnson Controls A19ACA-14 Temperature Control

The Johnson Controls A19ACA-14 (identical to the A19ACA-14C) is a heavy-duty remote bulb temperature control engineered for critical refrigeration and HVAC applications requiring a manual reset safety limit. This SPST mechanical thermostat is designed to open on low temperature, providing essential protection for equipment like walk-in freezers, display cases, and beverage coolers where maintaining a minimum thermal threshold is vital. Built with a liquid-filled sensing element, it ensures high repeat accuracy that remains unaffected by cross-ambient conditions or barometric pressure shifts, making it a reliable choice for demanding mechanical rooms.

The A19ACA-14 features a -30 to 100 degree F setpoint range, adjustable via a screwdriver slot range adjuster for enhanced security against unauthorized tampering. The 6-foot capillary and 3/8" x 4" sensing bulb allow for flexible mounting while maintaining rapid thermal response. Rated for 24 to 277Vac, this Penn A19 series control integrates seamlessly into most commercial control circuits. This unit is a direct mechanical thermostat replacement for legacy systems, ensuring HVACR systems stay within safe operating parameters without the reliability issues of electronic sensors in high-moisture environments.

• Manual Reset Feature: Ensures open low protection requires a physical reset before resuming operation, preventing short-cycling after a low-limit event.
• Rugged Construction: Encased in a NEMA 1 enclosure with dust-tight snap-acting contacts to ensure precision temperature control in industrial settings.
• Versatile Compatibility: Broad voltage support up to 277Vac makes it compatible with various HVACR hardware and pilot duty applications.
• Fixed Accuracy: The liquid-filled bulb provides consistent performance across the entire -30 to 100?F range.

Common Question: How does the manual reset function on the A19ACA-14 differ from automatic models?
Technical Answer: This unit is a "trip-free" manual reset device. When the temperature drops to the open low setpoint, the SPST contacts open. The system will not restart automatically when the temperature rises; a technician must manually press the reset button to restore the circuit, ensuring the cause of the temperature drop is investigated.

Common Question: Can the Johnson Controls A19ACA-14C be used for direct immersion in tanks?
Technical Answer: Yes, but it requires a bulb well (such as the WEL14A series) or a packing nut (FTG13A-600R) for immersion in liquid or closed tanks. The standard 3/8" x 4" bulb is designed for air or surface sensing otherwise.

Common Question: Is there a difference between the A19ACA-14 and A19ACA-14C?
Technical Answer: No, the "C" suffix typically denotes retail or commercial packaging, but the technical specs, -30 to 100 degree F range, and 6' capillary are identical across both part numbers.

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.