Description
The Johnson Controls A19ACA-14 is a mechanical remote bulb temperature control engineered for reliable, precise temperature switching across a wide range of commercial and industrial HVAC applications. With a broad voltage compatibility and a wide setpoint range, this control delivers dependable performance in demanding environments.
Key Features
- Wide voltage range: 24 to 277Vac for versatile system integration
- SPST (Single-Pole, Single-Throw) switching action — Open on temperature rise (Open Low)
- Manual reset operation for added safety and control
- Setpoint range: -30°F to 100°F, suitable for low-temperature and freeze protection applications
- 6-foot capillary length for flexible remote sensing placement
- 3/8″ x 4″ sensing bulb for accurate and responsive temperature detection
- Screwdriver slot range adjuster for easy, tool-accessible setpoint calibration
Product Specifications
- Brand: Johnson Controls
- SKU: A19ACA-14
- Control Type: Mechanical Temperature Control
- Switch Type: SPST
- Switch Action: Open Low (opens on temperature drop)
- Reset Type: Manual Reset
- Voltage Rating: 24 to 277Vac
- Setpoint Range: -30°F to 100°F
- Capillary Length: 6 feet
- Sensing Bulb Size: 3/8″ diameter x 4″ length
- Range Adjuster: Screwdriver slot
Typical Applications
- Freeze protection and low-temperature safety cutout
- Commercial refrigeration and cold storage monitoring
- Air handling unit and duct temperature control
- Hydronic and chilled water system protection
- Fan and compressor staging based on ambient or fluid temperature
The A19ACA-14’s manual reset feature ensures that the system does not automatically restart after a temperature fault, requiring deliberate operator intervention — a critical safety characteristic in freeze stat and low-limit applications. The 6-foot capillary and compact 3/8″ x 4″ sensing bulb allow installation in tight or remote locations while maintaining accurate temperature response.
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