The LC-VAC is Johnson Controls' specialized constant volume controller that ensures consistent airflow delivery in HVAC applications. This intelligent controller maintains preconfigured airflow settings regardless of system pressure variations, ensuring proper ventilation, indoor air quality, and occupant comfort across varying conditions.
Description
The Johnson Controls LC-VAC is a dedicated constant volume controller designed for precise airflow management in HVAC systems. It maintains consistent air delivery regardless of changes in static pressure or other system variables. The controller features configurable parameters for minimum and maximum flow settings, proportional-integral (PI) control logic, and built-in diagnostics for system troubleshooting. With support for BACnet MS/TP communications, it integrates seamlessly with building automation systems for centralized monitoring and control. The LC-VAC ensures stable ventilation rates and optimal comfort while helping to reduce energy consumption through accurate airflow regulation.
Key Features
- Constant volume airflow control
- Configurable minimum and maximum flow settings
- BACnet MS/TP communication protocol
- Proportional-integral (PI) control algorithms
- Built-in diagnostics and troubleshooting utilities
- Fieldbus network compatibility
- Pressure-independent operation
- Multiple operating modes (normal, minimum, maximum, manual)
- Compatible with Johnson Controls Verasys system
- 24 VAC power supply
Technical Specifications
- Controller Type: Constant volume
- Processor: 32-bit microprocessor
- Power Requirements: 24 VAC, 50/60 Hz
- Power Consumption: 5 VA maximum
- Communication: BACnet MS/TP (RS-485)
- Input: Flow sensor, temperature sensor (optional)
- Output: 0-10V actuator control signal
- Control Accuracy: ±5% of setpoint
- Airflow Range: Configurable per application
- Operating Temperature: 32 to 122°F (0 to 50°C)
- Operating Humidity: 10 to 90% RH (non-condensing)
- Dimensions: 5" x 4" x 2.25" (127 x 102 x 57 mm)
- Mounting: Direct mounting on equipment or DIN rail
- Enclosure Rating: IP20
- Certification: UL, CE, FCC Part 15 Class B
Applications
- Single Zone HVAC Systems
- Commercial Office Buildings
- Educational Facilities
- Healthcare Facilities
- Laboratory Environments
- Retail Spaces
- Hospitality Venues
- Manufacturing Facilities
Resources
- 📄 Datasheet: Quick Start Guide
- 🏢 Official Manufacturer: Johnson Controls
- 📷 Product Image:
Synonyms & Related Terms
- Johnson Controls VAC1000
- LC-VAC-1000-0
- Verasys Volume Controller
- Constant Volume Controller
- Airflow Management
- BACnet
- HVAC Control
Conclusion
The LC-VAC is a specialized controller that ensures consistent airflow in HVAC systems, regardless of pressure variations and changing conditions. Its intelligent control algorithms and BACnet integration make it suitable for a wide range of commercial and institutional applications. For further details about the LC-VAC or to inquire about compatibility with your building automation system, please contact Johnson Controls or an authorized distributor.
