Description
The Johnson Controls A19ACA-15 is a mechanical remote bulb temperature control engineered for reliable, precise temperature switching across a broad range of HVAC and refrigeration applications. With a wide voltage compatibility of 24 to 277Vac and a robust SPST Open Low switching action, this control is designed to open the circuit on a temperature drop — making it ideal for freeze protection, low-temperature cutout, and similar safety-critical applications.
Key Features
- Wide voltage range: 24 to 277Vac for versatile system compatibility
- SPST (Single-Pole, Single-Throw) switching action — Open on temperature decrease (Open Low)
- Manual reset operation for added safety in critical low-temperature cutout applications
- Setpoint range: -30°F to 100°F for broad freeze-protection and low-temp control coverage
- 10-foot capillary length for flexible remote sensing installation
- 3/8″ x 4″ sensing bulb for accurate, responsive temperature detection
- Screwdriver slot range adjuster for easy, tool-accessible setpoint calibration
- Mechanical design — no power required for sensing operation
Specifications
- Brand: Johnson Controls
- SKU / Model: A19ACA-15
- Control Type: Mechanical Remote Bulb Temperature Control
- Voltage: 24 to 277Vac
- Switch Action: SPST, Open Low (opens on temperature decrease)
- Reset Type: Manual Reset
- Setpoint Range: -30°F to 100°F
- Capillary Length: 10 feet
- Sensing Bulb Dimensions: 3/8″ diameter x 4″ length
- Range Adjuster: Screwdriver slot
Application
The A19ACA-15 is well-suited for use in commercial refrigeration, air handling units, cooling coils, and other HVAC systems where low-temperature protection or freeze-stat functionality is required. The manual reset feature ensures that a technician must physically acknowledge and reset the control after a trip event, preventing automatic restart until the cause of the low-temperature condition has been investigated and resolved. The 10-foot capillary and compact 3/8″ x 4″ sensing bulb allow for flexible installation in tight or remote sensing locations.
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