Which steps are recommended to validate thermostat setpoints and zone control during commissioning?

• A. Only measure supply temperature.
• B. Assume as-built equals design.
• C. Check each zone setpoint, occupancy-based adjustments, and confirm proper staging of equipment.
• D. Inspect lighting controls for zone management.

Answer: (C)

Validating thermostat setpoints and zone control during commissioning focuses on making sure each zone actually operates at the intended temperatures and that control actions respond correctly to occupancy and demand. The recommended steps are to check each zone setpoint, verify occupancy-based adjustments, and confirm proper staging of equipment. This approach ensures the design intent translates into building performance: zone thermostats must reflect the correct temperatures, automatically adjust for occupancy, and the HVAC system should sequence correctly with the appropriate staging and damper or valve positioning. Measuring only supply temperature provides just a single point of data and can miss how individual zones behave or how setpoints and sequencing are applied across the building. Assuming as-built equals design ignores real-world variations like sensor offsets, calibration needs, and field modifications. Inspecting lighting controls for zone management isn’t relevant to thermostat and HVAC zone control.