Hired-Hand External Damper Fans - Manual (Page 10)

Part No. 4801-5402 Rev. 2/09 Mega-Flow External Damper Fans & Cone Page 10 of 13
NOTE: The top
portion of the
Bumper Rod fits
into the same
mounting hole as
top fan guard
Figure 11 Fan Guard and Door Stop for 52” Fan
Fan Guard
Bumper Rod
Figure 10 – Door Stop for 52" Fan
3/8-16 x 1-1/4” Bolt
Fan Guard
3/8-16 x 1-1/4” Bolt
3/8-16 Nut
3/8 Washers
Bumper
Rod
3/8 Washers
3/8-16 Nut
Orifice-End
(Fan not
shown for
clarity.)
Fan Guard
Bumper Rod
Bumper Rod
Spring
NOTE: For the 48"
Fan Guard, attach
with spacer.
17. For the 36”, 48”, and 54” Fan, Skip to Step 20. For
the 52”, install the Bumper Rod as shown by
attaching with 3/8” hardware as shown in Figure 10.
18.
For the 52” Fan, install the Outside Fan Guard
using four 3/8x1 1/4” bolts and nuts. See the note
below for the 48" Fan Guard. See Figures 10 and
11. Skip to Step 21.
19. For the 36” and 54” Fan, install the Outside Fan
Guard using four 3/8x1-1/4” bolts and nuts. See
Figure 12.
20. For the 36”, 48”, &, 54” Fan, install the Bumper Rod as shown by attaching the hoohed end of the Bumper
Rod into the tab at the bottom of the Fan.. Attach the Bumper Rod Spring to the Bumper Rod and fasten
the spring to the top ring of the Fan Guard. See Figure 12.
Hooked end of
Bumper Rod
1003-0112
1/4"IDx1"D
washer(2)
1003-0108
1/4"IDx5/8"OD
washer
1004-0117
1/4x20x2 1/2
bolt
1403-10755
spacer
1001-1446
1/4"x20 nut