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Storage of Dampers Prior to Installation
The basic intent of a proper storage of heavy duty/industrial control and bubble tight damper is to prevent physical
damage, material corrosion, and deterioration of organic material.
1) Visually inspect the damper for damage. Store indoors, protected from sunlight, moisture, and flooding. Protect
dampers from debris and dirt accumulation. Keep all conduit entry plugs and actuator access covers in place.
2) Dampers may be stacked and stored horizontally if wood or equivalent spacers are placed between flanges to
protect finish. Do NOT store with axles vertical. Place dampers on pallets or supports to allow air circulation. Do
NOT store with damper directly on concrete or ground.
3) The damper drive should be stored in a clean dry area. Do not stack drives on top of one another. Add desiccant
to electrical compartment if storage area temperature drops below 38°F. Damage due to moisture is not covered
by actuator warranty.
4) Cycle damper with actuator once per year, a minimum of ten open/close cycles, to distribute grease in bearings
and actuator.
5) Consult manufacturer if storage time exceeds two years.
Installation Guidelines
Failure to follow instructions will void all warranties.
The basic intent of a proper installation is to secure the heavy duty/industrial damper into the opening in such a
manner as to prevent distortion and disruption of damper operation. The following items will aid in completing the
damper installation in a timely and effective manner.
1) Dampers are supplied standard without mounting holes. Drill or punch as required. If mounting holes are supplied,
use appropriate gasketing between mating flanges. Closed cell sponge rubber, solid rubber, maximum 60
durometer, or fiberglass drop warp tape is recommended. If damper is replacing existing damper, clean mating
surfaces prior to installing new damper.
2) Damper blades remain within the frame depth.
3) Damper may be installed with flow from either direction. Damper blade centerlines MUST be horizontal. Consult
Greenheck for modifications if damper is to be mounted with blade centerlines vertical.
4) Isolate damper from high vibratory loadings.
5) If any NEMA electrical enclosure is supplied, use appropriate electrical connections so as to maintain the NEMA
rating.
Do's
1) Use damper lifting lugs as provided.
2) Install all mounting bolts before tightening. Tighten in even and staggered pattern to evenly compress flange
gasketing.
3) Mating flange muse be flat and in the same plane.
4) Verify that damper does not strike mating ductwork or internal ductwork reinforcing when blade is in the open
position.
5) Provide expansion joints upstream/downstream for angled ductwork so damper is not subjected to thermal/wind
load forces off the centerline of damper.
Don'ts
1) Do not lift damper with chain/strap with blade propped open and with chain/strap through frame as this could
damage blade seal.
2) Do not use actuator, linkage, or axles as lifting point.
3) Do not tighten mounting bolts by starting at one point and "walking" around the damper as uneven flange
compressing can result.
2
HBT Series
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