Description
The Johnson Controls A19BAF-1 is a mechanical coiled bulb space temperature control designed for reliable, straightforward temperature sensing and switching in commercial and residential HVAC applications. With a wide operating voltage range and a durable SPDT switching configuration, this control delivers dependable performance across a broad range of system types.
Key Features
- Mechanical temperature control with coiled bulb and capillary sensing element
- Wide voltage compatibility: 24 to 277VAC — suitable for a variety of HVAC control circuits
- SPDT (Single-Pole, Double-Throw) switching action for versatile wiring configurations
- Automatic reset operation — no manual intervention required after setpoint recovery
- Setpoint range of 30°F to 110°F for broad temperature control coverage
- Fixed differential of 1.5°F for precise, consistent switching performance
- Coiled bulb dimensions: 1-3/8″ x 2-1/4″ for compact, space-efficient installation
- User-adjustable knob for easy setpoint configuration in the field
Specifications
- SKU / Part Number: A19BAF-1
- Brand: Johnson Controls
- Control Type: Mechanical Temperature Control
- Sensing Element: Coiled Bulb and Capillary
- Bulb Size: 1-3/8″ x 2-1/4″
- Voltage Rating: 24 to 277VAC
- Switch Action: SPDT
- Reset Type: Automatic
- Setpoint Range: 30°F to 110°F
- Fixed Differential: 1.5°F
- Setpoint Adjustment: Knob with range adjustment
Applications
- Space temperature sensing and control in commercial HVAC systems
- Fan coil units, air handling units, and unit ventilators
- Heating and cooling control circuits requiring reliable mechanical switching
- Retrofit and replacement applications for legacy Johnson Controls temperature controls
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