Description
The Johnson Controls A19ABC-4 is a mechanical remote bulb temperature control engineered for precise, reliable temperature sensing and switching in a wide range of HVAC and refrigeration applications. With a broad voltage compatibility of 24 to 277Vac and a rugged SPDT switching configuration, this control integrates seamlessly into commercial and light industrial systems where dependable temperature management is essential.
Key Features
- Wide voltage compatibility: 24 to 277Vac for versatile system integration
- SPDT (Single-Pole, Double-Throw) switching action for flexible control wiring
- Automatic reset operation — no manual intervention required after setpoint recovery
- Setpoint range of 50°F to 130°F to cover a broad spectrum of temperature control needs
- Adjustable differential of 3.5°F to 14°F for fine-tuned system response
- 8-foot capillary length provides installation flexibility for remote sensing locations
- 3/8″ x 5″ sensing bulb for accurate, responsive temperature measurement
- Mechanical (non-electronic) design for simple, proven reliability
Product Specifications
- SKU: A19ABC-4
- Brand: Johnson Controls
- Control Type: Remote Bulb Temperature Control
- Operation: Mechanical
- Voltage: 24 to 277Vac
- Switch Action: SPDT
- Reset Type: Automatic
- Setpoint Range: 50°F to 130°F
- Adjustable Differential: 3.5°F to 14°F
- Capillary Length: 8 feet
- Sensing Bulb Size: 3/8″ diameter x 5″ length
Applications
The A19ABC-4 is well-suited for use in air handling units, duct systems, hydronic heating and cooling systems, refrigeration equipment, and other HVAC applications requiring remote temperature sensing. The 8-foot capillary allows the sensing bulb to be positioned precisely at the point of measurement while the control body is mounted in a convenient, accessible location. The automatic reset feature reduces maintenance demands and ensures continuous system operation once temperatures return within range.
Why Choose the Johnson Controls A19ABC-4?
Johnson Controls is a globally recognized leader in building controls and HVAC solutions. The A19ABC-4 reflects their commitment to durable, field-proven mechanical controls that deliver consistent performance over years of service. Its wide voltage range, adjustable differential, and long capillary make it one of the most versatile remote bulb temperature controls available for commercial HVAC applications.
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