The Bard HVAC MC4002-A is an advanced solid state lead/lag controller engineered for dual-unit HVAC applications where reliable system sequencing and continuous alarm monitoring are essential. Designed for commercial and critical-environment installations, this controller intelligently alternates operation between two HVAC units to balance runtime hours, extend equipment life, and ensure redundant system coverage.
Key Features
- Advanced solid state design for dependable, long-lasting performance with no mechanical wear components
- Dual unit lead/lag sequencing automatically alternates between two HVAC units to equalize runtime and reduce wear
- Integrated base alarm board provides built-in fault detection and alarm signaling for proactive system monitoring
- Engineered for commercial and critical-environment HVAC applications requiring redundant equipment operation
- Supports automatic failover — if the lead unit fails, the lag unit is brought online to maintain conditioned space temperature
- Compact, panel-ready design for straightforward installation in existing or new control enclosures
- Genuine Bard HVAC OEM replacement part for assured compatibility with Bard equipment
Application
The MC4002-A is ideal for server rooms, telecommunications facilities, medical offices, and other mission-critical spaces where uninterrupted climate control is required. By managing two HVAC units in a lead/lag configuration, the controller ensures that one unit is always available as a backup while simultaneously distributing operating hours evenly across both systems.
Product Details
- Brand: Bard HVAC
- Model / SKU: MC4002-A
- Controller Type: Advanced Solid State Lead/Lag
- Configuration: Dual Unit
- Includes: Base Alarm Board
- Application: Commercial / Critical Environment HVAC
