Description
The Johnson Controls A19DAC-12 is a mechanical, strap-on surface-mounted temperature control engineered for reliable pipe surface temperature sensing in commercial and residential HVAC and hydronic applications. Featuring a wide setpoint range and broad voltage compatibility, this control delivers dependable switching performance with minimal installation complexity.
Key Features
- Wide setpoint range of 100°F to 240°F for versatile hot water, steam, and process piping applications
- Broad voltage compatibility: 120VAC to 240VAC for use across a variety of electrical systems
- SPDT (Single-Pole, Double-Throw) switching action enables both heating and cooling control configurations
- Automatic reset restores normal operation once the temperature returns within the setpoint range — no manual intervention required
- Fixed 10°F differential provides consistent, stable switching to prevent short-cycling
- Concealed range adjustment discourages unauthorized tampering while allowing authorized technician calibration
- Strap-on surface mount design for quick, tool-friendly installation directly onto pipes or surfaces — no immersion well required
- Mechanical (non-electronic) operation for proven reliability in demanding environments
Specifications
- Model: A19DAC-12
- Brand: Johnson Controls
- Control Type: Mechanical Temperature Control
- Mounting Style: Strap-On, Surface Mounted
- Switching Action: SPDT (Single-Pole, Double-Throw)
- Reset Type: Automatic
- Setpoint Range: 100°F to 240°F
- Fixed Differential: 10°F
- Voltage: 120VAC – 240VAC
- Range Adjustment: Concealed
Typical Applications
- Hot water heating systems and hydronic boiler piping
- Steam distribution and process piping temperature monitoring
- Commercial HVAC equipment protection and control
- High-temperature limit or operating control on supply or return lines
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