VAV System Commissioning Checklist: From PID Tuning to HMI Setup

For any VAV box manufacturer, the transition from mechanical assembly to a "Smart Terminal" depends on a flawless commissioning process. While proprietary VMAs often hide their logic in "black boxes," a offers the transparency needed for precision control.

1. Physical Inspection & Non-Polar PLC Verification

Before powering up, verify the physical layer. One of the biggest causes of terminal burnout in the field is wiring polarity errors.

●Wiring Check: Ensure you are using non-polar PLC technology for power and data sharing.

●Hardware Freedom: Confirm the 0-10V modulating actuator is correctly seated on the damper shaft.

2. Differential Pressure (DP) Sensor & Air Pressure Calibration

To achieve stable BACnet air pressure control, the integrated DP sensor must be zero-calibrated.

●Zero-Point Calibration: Perform calibration under "no-flow" conditions to ensure the sensor reads 0 Pa.

●Verification: Ensure the pressure readings are consistent across the BACnet MS/TP network for accurate air balancing.

3. Precision PID Parameter Tuning

This is the most critical step to prevent . Traditional floating-point control is often too slow, leading to system oscillations.

●Proportional Gain (P): Increase until the damper responds quickly to setpoint changes.

●Linear Regulation: Utilize 0-10V precision PID logic to ensure smooth, quiet operation.

4. HMI Local Interface & Parameter Mirroring

The 4-inch full capacitive touch color screen (SAS965-HMI) serves as the local window into the controller’s intelligence.

●7-Day Rapid Branding: For OEMs, the HMI can be customized with your logo, transforming a standard component into your proprietary branded solution.

5. BACnet Integration & Multi-Functional Logic

●Native Objects: Ensure all BACnet objects for Demand Controlled Ventilation (DCV) and 2-stage reheat are discoverable.

●Hotel Logic: Verify that occupancy-based hotellogic is active if required for hospitality projects.

VAV OEM Exclusive Commissioning Plan

From Assembly to Calibration, Full Process Efficiency