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Mistake & recovery · #134

Not verifying a VAV box actuator strokes fully open and closed before startup

3rd YearSystems & Controls

Before commissioning, manually command each VAV actuator to 0% and 100% and verify the damper blade moves to fully closed and fully open positions. A bind…

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Before commissioning, manually command each VAV actuator to 0% and 100% and verify the damper blade moves to fully closed and fully open positions. A binding or mis-ranged actuator prevents proper zone control.

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Can you verify this before I keep going? I’m looking at: Not verifying a VAV box actuator strokes fully open and closed before startup. What’s the approved correction for this job?

Do not

Do not hide, force, cover, or “make it work” if this affects safety, access, airflow, rated assemblies, supports, equipment, or inspection. Stop and verify the approved correction.

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Related apprentice questions

#176 · How do I ensure all VAV damper blades are in the open position before system blow-down?4th Year · TAB / Startup Prep#069 · How do I install a volume damper in a spin-in collar before attaching the flex?2nd Year · Flex Duct & Grilles#054 · Should a VAV box be hung independently of the ductwork?2nd Year · VAVs & Fan Coils#051 · How do I determine the "right" and "left" hand side of a VAV box?2nd Year · VAVs & Fan Coils