Description
Johnson Controls A19ADB-29 Utility Thermostat Overview
The Johnson Controls A19ADB-29 is a heavy-duty utility thermostat engineered for demanding commercial and industrial HVAC applications. Featuring a wide 90°F to 325°F temperature sensing range and compatibility with 120/208/240 VAC systems, this thermostat delivers reliable, precise control across a broad spectrum of heating and process applications. The remote bulb design with a 10-foot capillary allows flexible sensor placement away from the control body, making it ideal for installations where direct mounting is impractical.
Key Features
- Wide temperature range: 90°F to 325°F for versatile high-temperature applications
- Multi-voltage compatibility: 120/208/240 VAC for flexible electrical integration
- 10-foot capillary length for remote sensing and flexible installation
- Remote bulb design allows sensor placement in hard-to-reach locations
- Open on rise (Open Hi) action for high-limit safety control
- Manual reset function ensures deliberate operator intervention after a limit trip
- Enclosed setpoint adjustment for tamper-resistant, secure temperature setting
Application Highlights
The A19ADB-29 is well-suited for use as a high-limit safety thermostat in commercial heating equipment, boilers, unit heaters, duct systems, and industrial process control environments. The manual reset feature provides an added layer of protection by requiring a technician to physically reset the thermostat after a high-temperature event, preventing automatic restart until the root cause is addressed. The enclosed setpoint adjustment discourages unauthorized tampering, ensuring consistent and safe operation.
Specifications
- Brand: Johnson Controls
- Model / SKU: A19ADB-29
- Voltage: 120/208/240 VAC
- Temperature Range: 90°F – 325°F
- Capillary Length: 10 feet
- Sensing Element: Remote Bulb
- Action: Open on Temperature Rise (Open Hi)
- Reset Type: Manual Reset
- Setpoint Adjustment: Enclosed (tamper-resistant)
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