Greenheck HBS Series (474916) - Manual (Page 2)

Installation Guidelines-
Failure to follow instructions will void all warranties
The basic intent of a proper installation is to secure the heavy duty/industrial blast 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. 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) The HBS-330 & 430 is installed the same direction as
flow. The HBS-331 & 431 is installed opposite direction as
normal flow. Damper blade centerline 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) Damper must be installed square and free of twist or
other misalignment. Out of square, racked, twisted or
misaligned installations can cause the damper to not
operate properly.
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 must 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.
Dont’s
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 linkage or axles as lifting point.
3) Do not use prybar to match frame holes to mating
ductwork as frame can be warped or pulled out of square
by excessive force.
4) Do not tighten mounting bolts by starting at one point
and “walking” around the damper as uneven flange
compression can result.
Installation Details
Maximum Size and Installation Information
Models HBS-330 and HBS-331 must be installed in accordance with the installation shown herein. Both models are qualified
for installation within concrete/masonry or ductwork. This model is structurally designed to withstand a blast load of up to
5.77 psi (160 in. wg) at 29.69 psi-msec.
Models HBS-430 and HBS-431 must be installed in accordance with the installation shown herein. Both models are qualified
for installation within concrete/masonry or ductwork. This model is structurally designed to withstand a blast load of up to 15
psi (451 in. wg) at 100 psi-msec.
Typical End View
Notes:
1) Maximum blast loading for the HBS-330 and 331 is 5.77
psi @ 29.69 psi-msec. Maximum blast loading for the
HBS-430 and 431 is 15 psi @ 100 psi-msec.
2) The recommended fastener is a Grade 8 3/8 in. diameter
bolt.
3) It is assumed that the ductwork is designed to withstand
blast loading independent of damper.
Horizontal Section View
Mounting in Ductwork
Typical Vertical
Section View
2