The Johnson Controls A19ABA-40 is a heavy-duty, single-stage mechanical temperature control designed for demanding HVACR applications, including walk-in coolers, beverage chillers, and tank heating. This remote bulb temperature control features a liquid-filled sensing bulb (3/8" x 4") and a 6-foot capillary length, providing the flexibility needed for accurate ambient or immersion monitoring. Operating on a line voltage range of 24 to 277 VAC, the SPST switch is configured for open low action with an automatic reset, ensuring reliable refrigeration temperature control across a -30 to 100?F setpoint range. For precise field tuning, the unit includes a screwdriver slot range adjuster and an adjustable differential from 3 to 12?F, allowing contractors to maintain tight system tolerances. Built for long-term durability in industrial environments, the A19ABA-40 serves as a high-performance direct replacement for the discontinued A19ABA-40C, A19AHA-7, and A19ABA-47 models, streamlining maintenance for veteran technicians. Key Benefits: Broad Compatibility: Functions as a universal A19 series replacement for legacy Penn and Johnson Controls units. Field Adjustability: Features an adjustable differential (3 to 12?F) to prevent short-cycling in critical cooling applications. Reliable Switching: High-capacity SPST contacts rated for up to 22 Amps at 120/240 VAC. Industrial Build: Compact NEMA 1 enclosure with high-quality copper sensing elements for remote bulb sensing accuracy. Cross-Ambient Stability: Designed to maintain setpoint accuracy regardless of ambient temperatures surrounding the control body. Common Questions: What is the difference between A19ABA-40 and A19ABA-40C? The A19ABA-40 is the current production model and a direct drop-in replacement for the older -40C designation with identical specs. Can this be used for heating applications? This specific model is "Open Low," typically used for cooling/refrigeration to open the circuit on temperature drop. How do I adjust the temperature setpoint? Use a flat-head screwdriver in the external slot to rotate the internal dial to your required setpoint range. 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.
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