Description
The Johnson Controls A19AAC-9 is a high-range mechanical temperature control engineered for demanding HVAC and commercial applications where precise, reliable temperature switching is essential. Featuring a wide 100°F to 240°F setpoint range, this control is well-suited for high-temperature monitoring and protection tasks across a broad spectrum of heating and process systems.
Key Features
- Wide setpoint range of 100°F to 240°F for high-range temperature control applications
- Universal voltage compatibility: 24 to 277Vac for flexible installation across single- and multi-phase systems
- SPDT (Single Pole Double Throw) switching action for versatile control circuit configurations
- Automatic reset operation — restores normal operation once temperature returns within range without manual intervention
- Fixed 6°F differential minimizes short-cycling and provides stable switching performance
- 6-foot capillary length provides installation flexibility for remote sensing locations
- 3/8″ x 3-1/2″ sensing bulb for accurate, responsive temperature detection
- Screwdriver-adjustable setpoint for straightforward field calibration
Specifications
- SKU: A19AAC-9
- Brand: Johnson Controls
- Control Type: Mechanical Temperature Control
- Setpoint Range: 100°F to 240°F
- Voltage Rating: 24 to 277Vac
- Switch Action: SPDT
- Reset Type: Automatic
- Fixed Differential: 6°F
- Capillary Length: 6 feet
- Sensing Bulb Size: 3/8″ x 3-1/2″
- Adjustment Method: Screwdriver
Applications
- High-temperature limit and operating control in commercial HVAC systems
- Boiler and heating equipment temperature regulation
- Industrial process temperature monitoring and switching
- Fan and pump control based on high-range temperature conditions
The Johnson Controls A19AAC-9 delivers the dependable mechanical switching performance and broad voltage compatibility that HVAC professionals expect from the A19 series. Its automatic reset function and fixed differential make it a low-maintenance solution for high-temperature control applications.
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