FloAire Canopy Hood - Manual (Page 16)

16
Installation of Hood Accessories
Back Return Installation
1. Locate the assembly and unpack the product from the crate, being very careful not to dent or
scratch the outer surface. NOTE: Report any damage to the delivering freight carrier and file
a claim if appropriate.
2. If the supply risers are to be field cut, cut the risers in as desired. NOTE: For factory cut
supply risers, the manufacturer installs a 2” vertical flange around the opening. This flange
is intended to slip inside a supply boot that is provided by the installer.
3. Locate the wall and ceiling joists which will support the assembly.
4. Use 1/2” threaded rod to hang the back return. Install the threaded rod and angle or Unistrut®
that will be used to hang the assembly from the ceiling joists. Drill 9/16” holes as needed in the
angle for the threaded rod. Be sure to line up with the welded-on angle mounting brackets on the
back return.
5. The back return is typically hung so its top edge is the same height as the top edge of the hood.
See Figure 7. Refer to Step 2 in the Installation of a Single Hood instructions to determine the
hood and back return hanging heights.
6. Slowly raise the back return until hanging rods can be attached to the hanging angles. It is
advisable to do this before the back return reaches its final height. NOTE: Please use caution
as weight is not proportionally dispersed. Install the threaded rod into the back return
hanging angles and use heavy duty nuts to secure the connection.
7. Make sure the back return is level. Secure to wall in a manner acceptable to the AHJ.
8. If there are multiple back return sections, install the remaining sections now. Use caulk and the
T-strip trim between adjacent back return sections. See Figure 8.
9. Peel the protective plastic coating on the back return down below where the bottom edge of the
hood will rest against it, so it does not remain behind the hood.
10. Caulk the seams between the wall and the back return assembly after the hood and all other
accessories have been installed.