27
ComPac 9/04-12
2.5 F
RESH
A
IR
H
OOD
I
NSTALLATION
(AVP20-72)
1. Cut and remove insulation on the inside of the lower front access panel in the shape of the
rectangular opening. See Figure 6.
2. Insert flange on hood into opening and secure using the two #8 x 1/2 sheet metal screws
supplied.
Figure 6. Fresh Air Hood Installation
1. Models AVP20-72 have built-in mounting flanges.
2. Apply a bead of silicone sealer on the wall side of the bottom support brackets on the unit.
Circle the mounting holes with the silicone bead.
3. Refer to Figure 7. Attach the bottom support bracket to the wall using appropriate 3/8"
diameter hardware.
For example, on wooden structures, use 3/8" x 2-1/2" all-thread lag screws. The screws
must penetrate the center of the wall stud. Drill a pilot hole in the stud to prevent it from
splitting.
1. For wiring into the back of unit, locate the lower of the two knockouts on the wall side of
the unit. Drill a one inch hole in the shelter wall to match this opening. Allow sufficient
clearance to run 3/4" conduit through the hole and to the unit.
2. Using an appropriate and safe lifting device, set the unit on the bottom support bracket
mounted on the wall. You must stabilize the unit on the bracket with the lifting device or
by some other means - the bracket alone is not sufficient.
3. Make sure that the duct flanges are properly aligned with the wall opening. Adjust as
necessary.
4. Note the holes in each side flange. Using the holes for guides, drill holes through the wall
with a 3/8" drill bit. Insert the 3/8" x 5" bolts through the flanges. Install nuts and washers
on the inside of the shelter. Tighten the bolts to secure the unit.
5. Apply a bead of silicone where the mounting flange contacts the unit and the shelter wall.
6. On the inside of the shelter, install the wall sleeves in the supply and return air openings.
The sleeves may be trimmed to fit flush with the inside wall.
7. Check the fit of each sleeve to its mating flange for possible air leaks. Apply silicone sealer
to close any gaps. Install the air return and supply grilles.
2.6 B
RACKET
I
NSTALLATION
(AVP20-72)
2.7 M
OUNTING
T
HE
U
NIT
(AVP20-72)
