Next, the cone gussets will be placed on the cone.
NOTE: there are two sets of two gussets. The longer
set will have a notch on the end. The longer set
should be placed on either side of the cone drain hole
(cone bottom). The shorter set of gussets should be
placed opposite the drain hole (cone top). To attach a
gusset, align the hole in the shorter flange with the
hole in the assembly ring and in the cone at the 45° angles. Push a 1/4” X 1-1/4” bolt through the
assembly ring, through the cone, and through the gusset. Fasten the bolt with a 1/4” whiz-lock nut.
Repeat this process for the three other gussets. Refer to Figures 12 and 13 for details. Caulk around the
damper door ring to prevent light and wind blown rain water leakage.
Once the guard is in place, the damper door ring
assembly should be fastened to the cone. First, invert
the cone again so that the guard end is on the ground.
Take the damper door assembly, making sure the
doors open downward, and insert it at an angle into
the cone as shown in Figure 11. The end with the
door restraining cable should be opposite the drain
hole in the cone. Once the entire ring assembly has
been placed inside the cone, level the ring and align
the pre-drilled ring holes with the corresponding
overlapping holes in the cone. From the inside of the
assembly, place a 1/4” X 1-1/4” bolt through the holes
in the 3-o'clock and 9-o’clock positions (locating the
drain hole at the 6-o’clock position) and fasten with two
1/4” whiz-lock nuts. Continue fastening the door
assembly to the cone using two 5/16” X 1/2” self-
tapping screws: one above the Drain Hole (bottom),
and one on the opposite side (top) of the cone.
Figure 12
Door Cable End
Figure 11
Drain Hole
Door Cable
3-O’Clock Hole
9-O’Clock Hole
Drain Hole
Long (Notched) Gussets
Figure 13
Door Cable
Short Gusset
DAMPER DOOR INSTALLATION
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