Combination Fire/Smoke Dampers
Actuator scope confusion, wrong fail mode, linkage/travel wrong
Red / Stop And Verify4thBatch 4
What This Helps With
Actuator scope confusion, wrong fail mode, linkage/travel wrong
Apprentice words: fire smoke damper
Trade terms: combination fire/smoke damper, actuator, smoke detector interface
Check First
Listed install, actuator/travel, controls interface, fail position
What Not To Do
Modify a listed combo assembly
What can go wrong: Adjusting actuator that's controls scope
Better Foreman Question
What's the listed detail and who commissions this combo damper?
Verify With
Reference type: NFPA 90A
Source to verify: UL 555/555S; NFPA 90A; submittals; AHJ
Safe wording: RED ZONE. Listed assembly + controls handoff; verify all scopes.