Description
The Johnson Controls A19BUC-2 is a mechanical, explosion-proof remote bulb temperature controller engineered for reliable performance in hazardous location environments. With a wide operating voltage range and a durable sensing assembly, this unit delivers precise temperature switching for demanding commercial and industrial HVAC applications.
Key Features
- Hazardous location, explosion-proof rated design for safe use in volatile environments
- Wide voltage compatibility: 24 to 277Vac for flexible installation across a variety of systems
- SPDT (Single Pole Double Throw) switching action supports both heating and cooling control sequences
- Automatic reset operation — no manual intervention required after setpoint recovery
- 20°F to 80°F adjustable setpoint range for versatile low-to-mid temperature control
- 3.5°F fixed differential minimizes short cycling and promotes stable system operation
- Coiled capillary and remote sensing bulb assembly for accurate, responsive temperature sensing at a distance from the control body
- Mechanical control technology — no external power required for sensing function
Specifications
- SKU: A19BUC-2
- Brand: Johnson Controls
- Control Type: Mechanical Temperature Controller
- Switch Action: SPDT
- Voltage Range: 24 to 277Vac
- Setpoint Range: 20°F to 80°F
- Fixed Differential: 3.5°F
- Reset Type: Automatic
- Sensing Element: Coiled Capillary and Remote Sensing Bulb
- Listing: Hazardous Location / Explosion Proof
Applications
- Hazardous location HVAC and refrigeration control
- Industrial process temperature switching
- Commercial cooling and heating systems requiring remote sensing
- Environments with flammable gases, vapors, or dust where explosion-proof ratings are required
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