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Excessive Weight Hazard
Use two or more people to move
and install external blower.
Failure to do so can result in
back or other injury.
WARNING
1.
Discard any cardboard packaging
from the blower wheel.
2.
Remove wiring box cover and
screws.
3.
Attach an appropriate U.L./CSA-
listed strain relief in the hole at the rear
of the wiring box.
Follow the instructions for your type of
installation.
WALL INSTALLATIONS
ROOF INSTALLATIONS
1.
Choose a location on an outside
wall where no wall studs, wires, pipes,
etc. run through the opening area. A
minimum distance of 24" (61 cm) from
exterior blower to ground may be
required depending on local code.
Make sure to leave room for anticipated
snowfall in your region.
2.
Drill the guide hole in the center
of the 11" (27.9 cm) diameter opening
area.
3.
Mark a 27-1/2" x 34" (69.9 x
86.4 cm) rectangle on wall as indicated
in FIGURE 1.
4.
Cut a rectangular hole in the
siding only. Do not cut sheathing. Nail
down all siding ends.
5.
Mark an 11" (27.9 cm) diameter
circle around Guide Hole as indicated
in FIGURE 1. Mark center of the
1-1/4" (or 3.0 cm) diameter hole for
electrical wiring as indicated in
FIGURE 1.
6.
Cut 11" (27.9 cm) diameter hole
in sheathing. Drill the 1-1/4" (or 3.0
cm) diameter electrical wiring hole.
7.
Run a large bead of caulk on the
back side of the housing along the outer
edge.
8.
Center the exterior blower ring in
the 11"
(27.9 cm)
diameter hole, making
sure that the 1-1/4" (or 3.0 cm) diameter
electrical wiring hole lines up with the
hole in the wiring box.
9.
Attach the exterior blower to wall
using screws appropriate for your
installation. All four holes in the back
panel must be filled to prevent moisture
that may get inside the
exterior
blower
housing from leaking into the home.
10.
Seal all around the mounting
screw heads with caulk.
FIGURE 1
FIGURE 2
34"
(86.4 cm)
15"
(38.1 cm)
10-5/8"
(27 cm)
1-1/4"
(3.0 cm)
dia. hole
9-3/8"
(23.8 cm)
14"
(35.6 cm)
9-3/8"
(23.8 cm)
23"
(58.4 cm)
12-3/4"
(32.4 cm)
10-5/8"
(27 cm)
1-1/4"
(3.0 cm)
dia. hole
11" (27.9 cm)
dia. hole
guide
hole
guide
hole
11" (27.9 cm)
dia. hole
27-1/2" (69.9 cm)
13-3/4"
(34.9 cm)
25" (63.5 cm)
1.
Choose location on rear slope of
roof that minimizes vent run. Avoid
obstacles such as TV leads, electric
lines, etc. If
exterior
blower top is level
with roof peak, it will not be seen from
street. Remember this location as you
work from inside the attic.
2.
Mark a point half-way between
the rafters and drill a guide hole at this
point.
3.
From the outside, using the guide
hole as a starting point, mark the
rectangular cut-out as indicated in
FIGURE 2. Remove ONLY the shingles
in THIS AREA.
4.
Mark an 11" (27.9 cm) diameter
circle around guide hole as indicated in
FIGURE 2. Mark center of the 1-1/4"
(or 3.0 cm) diameter hole for the
electrical wiring as indicated in
FIGURE 2.
5.
Cut out the roof boards along the
11" (27.9 cm) diameter circle. Drill the
1-1/4" (or 3.0 cm) diameter electrical
wiring hole.
Page 3
11.
Go to "Making electrical and
vent connections", Page 4.