Description
The Johnson Controls A19QSC-1 is a mechanical remote bulb temperature control engineered for dependable, precise temperature switching across a wide range of HVAC and building automation applications. With a broad voltage compatibility of 24 to 277VAC and a rugged SPDT switching action, this controller integrates seamlessly into commercial and industrial systems requiring reliable on/off temperature management.
Key Features
- Setpoint range of 0°F to 150°F for versatile heating and cooling applications
- 5°F fixed differential for consistent, predictable switching performance
- SPDT (Single-Pole, Double-Throw) switching action for flexible circuit control
- Wide voltage compatibility: 24 to 277VAC for broad system integration
- Automatic reset operation — no manual intervention required after trip
- 10-foot capillary tube for remote sensing flexibility and ease of installation
- 3/10″ x 2-1/2″ sensing bulb for accurate, responsive temperature detection
- Concealed screwdriver setpoint adjustment for tamper-resistant operation
- Mechanical design for reliable operation without electronic components
Specifications
- SKU: A19QSC-1
- Brand: Johnson Controls
- Control Type: Mechanical Remote Bulb Temperature Control
- Switching Action: SPDT (Single-Pole, Double-Throw)
- Voltage Rating: 24 to 277VAC
- Setpoint Range: 0°F to 150°F
- Differential: 5°F Fixed
- Reset Type: Automatic
- Capillary Length: 10 feet
- Sensing Bulb Size: 3/10″ x 2-1/2″
- Setpoint Adjustment: Concealed screwdriver
Applications
- Commercial HVAC air handling and duct temperature control
- Hydronic heating and cooling systems
- Refrigeration equipment temperature monitoring
- Industrial process temperature switching
- Building automation and energy management systems
The A19QSC-1’s concealed screwdriver adjustment discourages unauthorized setpoint changes, making it ideal for commercial environments where consistent temperature control is critical. The long 10-foot capillary provides installation flexibility, allowing the control head to be mounted away from the sensing location for added convenience.
Reviews
There are no reviews yet.