Project brief
A Building Management System for an 8-floor hospital facility integrating HVAC control (37 AHUs, 120+ FCUs), lighting management (1200+ zones), medical gas monitoring (O2, N2O, CO2, vacuum), access control (220 doors), and energy metering. The system maintains strict ISO 14644 cleanroom conditions in surgical suites and ICUs.
The narrative describes building-management integration and operator visibility. It does not independently establish clinical-room or cleanroom compliance.
The engineering challenge
Coordinate building systems with different protocols while keeping room conditions and alarms visible.
Engineering approach
- Organize HVAC, lighting, access, and utility systems through a common supervisory layer.
- Use local control loops for temperature and humidity regulation.
- Consolidate energy measurements and severity-based alarms for operators.
Features & capabilities
- HVAC control: 37 AHUs, 120 FCUs with PID temperature/humidity control
- Medical gas: O2, N2O, CO2, vacuum — continuous monitoring, alarm outputs
- Cleanroom compliance: ±0.5°C temp, ±3% RH in surgical suites and ICUs
- Lighting management: DALI protocol, 1200 zones with scene control
- BACnet/IP and Modbus RTU integration for 3rd party equipment
- Real-time energy monitoring: electricity, chilled water, steam
- 24/7 alarm management: tiered severity with escalation protocols
- Touchscreen room controller with nurse call integration
Software & engineering tools
Siemens S7-1200 PLC, Simatic WinCC SCADA, BACnet/IP, DALI gateway, custom sensor PCBs, Altium Designer