Round Volume Dampers
Installed backward, no access, or blade not set for balancing
Yellow / Check First2ndBatch 5
What This Helps With
Installed backward, no access, or blade not set for balancing
Apprentice words: round damper
Trade terms: round volume damper, butterfly damper, balancing damper
Check First
Blade orientation, handle access, and that it's not a fire device
What Not To Do
Bury the handle where balancers can't reach
What can go wrong: Confusing it with a fire damper
Better Foreman Question
Is this a balancing damper (not fire), and is the handle accessible?
Verify With
Reference type: project drawings
Source to verify: Drawings; balancing scope
Safe wording: Distinguish balancing vs fire clearly. If any doubt it's a fire device, mark RED and verify.