Description
Johnson Controls A19ADB-22 Utility Thermostat Overview
The Johnson Controls A19ADB-22 is a heavy-duty utility thermostat engineered for reliable high-temperature sensing and control in demanding HVAC and industrial applications. Featuring a remote bulb design with an 8-foot capillary, this thermostat delivers precise temperature monitoring at a distance from the control panel, making it ideal for duct, oven, boiler, and process equipment installations.
Key Features
- Wide temperature sensing range of 90°F to 325°F for high-temperature applications
- Compatible with 120, 208, and 240 VAC power supplies for versatile electrical integration
- 8-foot capillary length enables remote bulb placement away from the control unit
- Open on Rise (Open Hi) action provides a safety-oriented response to over-temperature conditions
- Manual reset function requires deliberate operator intervention before resuming operation after a limit trip — enhancing safety compliance
- Knob setpoint adjustment for straightforward, tool-free temperature setting in the field
- Remote bulb sensing element accurately detects temperature at the point of application
Specifications
- SKU / Model: A19ADB-22
- Brand: Johnson Controls
- Voltage: 120/208/240 VAC
- Temperature Range: 90°F – 325°F
- Capillary Length: 8 feet
- Sensing Type: Remote Bulb
- Switch Action: Open on Rise (Open Hi)
- Reset Type: Manual Reset
- Setpoint Adjustment: Knob
Applications
The A19ADB-22 is well-suited for use as a high-limit safety thermostat in commercial and industrial HVAC systems, unit heaters, duct heating applications, boiler controls, and process equipment where over-temperature protection with manual reset is required. The broad voltage compatibility and wide sensing range make it a versatile solution for OEM and replacement installations alike.
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