from nfpa 90A 2002
Chapter 5 Integration of a Ventilation and Air-Conditioning System(s) with Building Construction
5.4.7 Maintenance. At least every 4 years, the following maintenance shall be performed:
(1) Fusible links (where applicable) shall be removed.
(2) All dampers shall be operated to verify that they close fully.
(3) The latch, if provided, shall be checked.
(4) Moving parts shall be lubricated as necessary.
B.2 Fire Dampers, Smoke Dampers, and Ceiling Dampers.
B.2.1 Each damper should be examined every 2 years to ensure that it is not rusted or blocked, giving attention to hinges and other moving parts. It is recommended that dampers operate with normal system airflow to ensure that they close and are not held open by the airstream. Care should be exercised to ensure that such tests are performed safely and do not cause system damage.
B.2.2 Refer to NFPA 92A, Recommended Practice for Smoke-Control Systems, for maintenance of smoke and combination fire/smoke dampers for each damper installed as part of a smoke control system.
may have changed since 2002