Description
The Johnson Controls A19ABC-24 is a mechanical remote bulb temperature control engineered for reliable, precise temperature sensing and switching across a broad range of HVAC and refrigeration applications. With a wide operating voltage range of 24 to 277Vac and a rugged SPDT (Single-Pole, Double-Throw) switching configuration, this control integrates seamlessly into commercial and industrial systems requiring dependable temperature-based switching.
Key Features
- Wide voltage compatibility: 24 to 277Vac for versatile system integration
- SPDT switching action for flexible circuit control (normally open and normally closed outputs)
- Automatic reset for hands-free recovery after setpoint is reached
- Setpoint range of -30°F to 100°F for cold storage, refrigeration, and HVAC applications
- Adjustable differential of 3°F to 12°F for fine-tuned control and reduced short-cycling
- 8-foot capillary length provides installation flexibility for remote sensing locations
- 3/8″ x 4″ sensing bulb for accurate, responsive temperature detection
- Mechanical design — no power required for sensing, ensuring reliable operation
Specifications
- Brand: Johnson Controls
- SKU: A19ABC-24
- Control Type: Mechanical Remote Bulb Temperature Control
- Voltage: 24 to 277Vac
- Switch Type: SPDT (Single-Pole, Double-Throw)
- Reset Type: Automatic
- Setpoint Range: -30°F to 100°F
- Adjustable Differential: 3°F to 12°F
- Capillary Length: 8 feet
- Sensing Bulb Size: 3/8″ diameter x 4″ length
Applications
- Commercial refrigeration and cold storage temperature control
- HVAC unit protection and freeze stat applications
- Fan cycling and equipment on/off control
- Industrial process temperature switching
- Cooling tower and chiller system controls
The A19ABC-24 is a trusted Johnson Controls solution for contractors and facility managers who need a dependable, field-adjustable mechanical temperature switch. Its long capillary and robust sensing bulb make it ideal for installations where the control must be mounted away from the sensing point.
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