Grain Systems Bin Accessories PNEG-524 - Manual (Page 13)

5. Installation
PNEG-524 Roof Exhaust Fan 13
18" and 24" Roof Fan Location
The roof fans should be equally spaced on the bin roof circumference. When installed, the roof fan should
be positioned as far up the roof slope as the tapered ribs of the bin roof sheet will allow.
The roof fan location should be selected to provide a rigid mounting for the fan. For bins with an
inner roof structure, the roof fan should be anchored to the inner roof structure.
18" Roof Fan Mounting
The roof fan can be installed in the roof sheet before assembling the roof, or after the roof is assembled.
Locate roof fan so that inner roof structure does not interfere with installation. The fan is secured
by bolts that must be fastened from the inside of the bin roof, therefore, the assembly should be made
before the sidewalls are erected.
1. Using the loose flange from the fan assembly as a template, position the desired roof fan location,
allowing for 1" minimum between the roof sheet rib and the flange. (See Figure 5C.) Mark the
sixteen (16), 3/8" mounting holes and elliptical fan mounting hole.
2. Drill the sixteen (16), 3/8" holes and cut out the elliptical hole. Use the caulk provided, which is
specified as a seal for metal sheets in an outdoor application and apply along the inside edge of the
drilled holes on the bin roof sheet.
(See Figure 5C.)
Figure 5C The 18" template location on the roof sheet (left) and the caulking location on the roof sheet (right).
3. Place the roof fan into the elliptical hole from the outside of the roof sheet inward. On the side of the
roof sheet that will be inside the bin, position the loose mounting flange over the fan tube. Using the
sixteen (16) 5/16" x 3/4" bin bolts with the neoprene washer head to the outside of the bin, secure
the fan, roof sheet and flange with the 5/16" nuts provided.
(See Figure 5D on Page 14.)