Find the access side, label, actuator, fusible link, sleeve, blade area, or inspection point.
Check that permanent access remains reachable after walls, ceiling, insulation, hangers, and other trades are installed.
Keep labels visible/readable or document them before anything can cover them.
Ask foreman
In Fire/Smoke Dampers, Access Doors & Rated Assemblies, I’m looking at: What do I do when covering UL label or losing documentation? What should I verify before I cut, drill, seal, cover, move, or install?
Do not
Do not treat damper or rated-assembly work like normal duct. Do not paint over, cover, remove, or lose damper labels/documentation.