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To mount the cone guard, place eight 1/4” X 1-1/4” bolts in the eight remaining holes in the end of the cone
from the
outside in
, and fasten them with 1/4” whiz-lock nuts. These will serve as the Guard Studs. See Figures 12 & 13.
After the Guard Studs have been fastened, mount the Cone Guard by placing the Guard eyelets over the Guard
Studs and fastening each with another 1/4” whiz-lock nut. While installing the cone guard, take the spring at the end
of the door restraining cable, and attach it to vertical guard rib
below the 3rd ring (from the center) of the guard. See Figure
14.
Next, mount the spring bracket at the center of the door ring
assembly where the struts intersect. Use two cable ties to
secure the spring bracket as shown in Figure 15. Attach one
end of each spring to the spring bracket. The other end of each
spring should be attached to the inside door hole in the damper
door.
To check for proper damper operation, open the doors fully,
and allow them to close. If either door fails to close properly,
rotate the assembly slightly on the fan orifice until both doors
will close properly. With the cone secured in place, remove the
Handles for use on the next fan.
GUARD MOUNTING
Once the unit is assembled, the inlet guard
must be in place before operation. To mount
the guard, center it over the fan housing.
Then, slip the guard over the two guard clips
on the top housing flange. To secure the
guard, close the 6 guard latches over the
guard wire. The installation of the unit is now
complete. See Figure 16 for details.
Figure 17 — Assembled Unit
Figure 16
Guard Clip
Guard Latch
Figure 15 — Spring & Bracket Assembly
Spring
Bracket
Cable
Ties
Figure 13 — Guard Stud Detail
Large Diameter
Cone Edge
Guard Studs
Guard
Stud
Bolt
Cone
Panel
Guard
Eyelet
Whiz-Lock
Nuts
Figure 12
Figure 14 — Door Cable