NFPA 80 (Fire) & NFPA 105 (Smoke)
See NFPA 80 & NFPA 105 for details. The damper cleaning and examination
check list here is based on them.
Damper installation shall meet code requirements. Fire stopping and drywall integrity shall be
confirmed. Damper blades shall be in plane of wall. Duct shall be fall away with no fasteners
connected to damper sleeve.
a. Dampers and ducts shall be cleaned of all foreign debris and dust build-up.
b. All exposed moving parts of the damper shall be dry lubricated as required by the
manufacturer. Do not use oil as it draws dirt.
c. Damper shall be examined without defective old motor or new actuator to determine:
i. The damper shall fully close from the open position.
ii. Damper shall fully open from the closed position.
iii. There are no obstructions to the operation of the damper. The damper shall not be
blocked from closure in any way due to rusted, bent, misaligned, or damaged
frame or blades. The damper shall not have defective hinges, side &/or blade
seals, or other moving parts. The damper frame shall not be penetrated by any
foreign objects that would affect operation.
d. If the damper is equipped with a fusible link, the link shall be removed for testing to
ensure full closure and lock-in-place if so equipped. If the link is damaged or painted, it
shall be replaced with a link of the same size, temperature, and load rating.
e. The fusible link shall be reinstalled after testing is complete.
After installation and wiring of new actuator it shall be tested.
a.
The checklist may be customized using material here and in NFPA Standards. Multiple
geometric configurations of springs, fusible link, thermal sensor(s), and actuation are
possible. Confirm with AHJ if any additional requirements exist.
b.
Electric thermal sensors, if present, must be tested and replaced if defective.
c.
The test shall be conducted with normal HVAC airflow.
d.
When equipped with smoke detection activation, the smoke detector shall be activated and
damper operation observed.
For the Air Movement and Control Association damper maintainance manual go to:
http://www.amca.org/publications/damper_maintenance.aspx
NFPA requires damper inspection and repair of dampers.
See
. for Standards. Details not covered here.
Test voltage input to actuators and repair as necessary if voltage is not correct.
Old breakers often deliver below 115V and failed actuators may be due to power
supply problems.
Gear Train Motors and Linkages - Replacements with Belimo March 2018
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