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© T.A. Morrison & Co. Inc., 2020
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TAMCO MEDIUM-DUTY BACKDRAFT DAMPER |
Installation Guidelines
For Series 7000, 7000 WT, 7000 CW
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GENERAL INSTALLATION NOTES
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Backdraft dampers must be kept clean and dry. Store indoors to
protect from dirt, dust and weather. Do not store at temperatures
in excess of 100°F
(38
°
C)
.
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Do not stack backdraft dampers on top of or against each other.
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Backdraft dampers are to be handled and lifted by the frames only.
Do not use the blades or linkage to lift backdraft dampers.
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Do not drop, drag or twist.
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Multiple-section assemblies will require sufficient people and
appropriate rigging to lift units safely and without causing damage.
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Ensure that the opening or duct work is free of any obstructions
and is adequately supported, so that damper operation is not
adversely affected.
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The system must support the damper. The damper cannot support
the system. Do not use the damper to square up duct. The opening
must be plumb, straight, level, square, and sized correctly for the
backdraft damper.
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The backdraft damper must not be twisted, compressed or
stretched to fit the opening. Once installed, the blades must be
free to move without binding. Use shims between the damper
frame and the opening to prevent distortion or stretching of the
backdraft damper.
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When installing fasteners (provided by others), they should be
located so as not to interfere with linkage parts or blade operation.
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Consult engineering plans prior to installation to confirm airflow
direction.
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TAMCO recommends that backdraft dampers be installed at a
minimum distance of one (1) fan diameter away from the fan, for
custom air handler exhaust applications. AMCA 200 and AMCA
201 recommend a distance of one (1) duct diameter for each 1000
fpm in order to achieve uniform air at the backdraft damper. The
type of fan and distance allowed between the fan and the damper
will determine the air velocity profile the backdraft damper will be
subjected to.
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When backdraft dampers are installed in the vertical plane, blades
must always be horizontal.
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Series 7000, 7000 WT, and 7000 CW Backdraft Dampers can
be installed in the vertical plane (Airflow Horizontal), or in the
horizontal plane (Airflow Up).
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Only Series 7000 CW Counterweighted Backdraft Dampers can be
installed in the horizontal plane with Airflow Down.
TAMCO’s all-aluminum backdraft dampers are constructed with maintenance-free bearing and linkage components.
Caution:
Never use any lubricants, such as grease or silicone, on TAMCO backdraft dampers.
In applications where the humidity level is unusually elevated, or where there are extremely high levels of dust and dirt
particles, TAMCO recommends that the damper linkage and bearing system should be cleaned once a year. This can be
done by blowing away dust using compressed air. If needed, a domestic-strength steam cleaner can be used to loosen
dirt, which can then be blown out with compressed air, along with any remaining water droplets
Note that all technical information available on TAMCO’s website at www.tamcodampers.com
supersedes and takes precedence over all information contained within the printed catalog.
CALL TAMCO CUSTOMER SERVICE WITH ANY QUESTIONS CONCERNING TAMCO BACKDRAFT DAMPERS
1-800-561-3449
DO NOT ADJUST LINKAGE MECHANISM. IF PROBLEM STILL EXISTS
AFTER VERIFICATION AND CORRECT ACTION,
CALL TAMCO CUSTOMER SERVICE.
