Twin City Hooded Tubeaxial Roof Fans (Non-Filtered) - IM-4850NF - Manual (Page 2)

2 Twin City IM-4850NF Twin City IM-4850NF 3
Step 1 – Install Hood Mount Bars
and Gussets
Fasteners (Kit #1):
Cap Screw, Serrated Flange, 3/8-16 x 0.75
Hex Nut, Serrated Flange, 3/8-16
A. Assemble Hood Mount Bars, both sides,
using cap screws and nuts.
B. Assemble four Hood Gussets to Hood Mount
Bars and fan housing using cap screws and
nuts.
Hood
Mount
Bar
Hood Gusset
Hood Gusset
Hood
Gusset
Hood Gusset
Hood
Mount
Bar
Nut
3/8-16 x .75
Cap Screw
Step 2 – Install Fixed Screens
Fasteners (Kit #6):
Cap Screw, Serrated Flange, 5/16-18 x 0.75
Hex Nut, Serrated Flange, 5/16-18
A. Install two Fixed Screen Assemblies using
cap screws and nuts. Do not fully tighten
these fasteners. They will be fully tightened
in the next step.
Step 3 – Install Removable Screens
A. Install two Removable Screen Assemblies.
After positioning the assemblies, rotate the
locking tabs in place and tighten.
B. Fully tighten the Fixed Screen assembly fas-
teners from the previous step.
Bird Screen
Assy, Fixed
5/16-18
Cap Screw
5/16-18 Nut
Bird Screen
Assy, Fixed
Removable
Screen Assy
Removable
Screen Assy
Step 4 – Install Hood Side Rails
Fasteners (Kit #1):
Cap Screw, Serrated Flange, 3/8-16 x 1.25
Hex Nut, Serrated Flange, 3/8-16
A. Install two Hood Side Rail Assemblies to the
Hood Mount Bars using cap screws and nuts.
Do not fully tighten fasteners. They will be
tightened in Step 7.
Hood
Side
Rail
Assy
Hood
Side
Rail
Assy
3/18-16 x 1.25
Cap Screw
and Nut
End Panel Assy,
Male
IMPORTANT - This flange must
be male. Refer to the detail below.
Male Flange
(Narrow)
Female Flange
(Wide)
End View of Panel
Step 5 – Install End Panel Assy
(Male)
Fasteners (Kit #1):
Screws, #12
A. Install the End Panel Assembly (male type)
using #12 screws.
Hood Panels
Step 6 – Install Hood Panels
Fasteners (Kit #1):
Screws, #12
A. Install the Hood Panels using #12 screws.
B. On sizes 54 and 60, hood clips must be
installed at each interlocking rib while install-
ing the panels. Position the Hood Panel in
place and reach underneath to slide the clip
into place.
End View of Panel
Locking Tab,
rotate into place
and tighten
Detail of locking tabs
For Sizes 54 and 60,
install hood clips at each rib.
#12
Screws
Hood Side
Rail Assy
Hood
Panels
Hood Clip