10
WALL INSTALLATION
EXTERIOR-POWER VENTILATOR
DEV900-Exterior-Power Ventilator Kit (900CFM)
1. Choose a position on the outside wall. Min. 24” (61.0
cm from ground may vary depending on local codes
or location. Make sure that no wall studs, pipes or
wires run through the opening area.
2. Drill a guide hole at the center of the opening area.
3. From the outside, use the guide hole as a starting
point to lay out the installation.
A. Use a T-square to measure 10
3/4
” (27.3 cm) to the
left of the guide hole, then 12
7/8
” (32.7 cm) to
locate the top-left corner of the layout.
B. Starting from the top -left corner, mark a 25”
(63.5 cm) by 28
1/2
” (72.4 cm) rectangle on wall
located from guide hole.
4. Cut a rectangular hole in the siding only. Do not cut
the sheathing. Nail down all siding ends.
5. Mark an 11” (27.9 cm) diameter circle centered on the
guide hole and mark the center of the 1
1/4
” diameter
electrical wiring hole.
6. Cut the 11” (27.9 cm) hole in the sheathing and drill
the 1
1/4
”(3.2 cm) as marked.
7. Place a large bead of caulk on the back side of the
housing along the outer edge.
8. Center the blower ring in the 11” (27.9 cm) diameter
hole, making sure that the 1
1/4
” (3.2 cm) diameter
electrical wiring hole aligns with the hole in the wiring
box.
9. Attach blower to the wall with the six screws
provided. It is recommended that the screws
be located inside the blower housing. All six
holes in the back panel must be filled, or any
moisture that may get inside the housing could
leak into the house.
10. Using a good grade of caulk, seal all around the
mounting screw heads.
11. Bring electrical wiring through the hole in the
wiring box and secure it according to local
codes.
12. Make the electrical connections with the proper
connector for the type of wire being used.
Connect white to white, black to black, and
green or bare wire to green.
13. Replace wiring box cover and screws. Do not
pinch wiring under cover.
14. Check for free movement of the damper before
installing housing cover and screws.
15. Turn on power and check operation of the blower.
16. Top and side flanges of the back plate may be
covered with trim strips. Do not block grill opening at
bottom with trim. It will adversely affect performance
of the blower.
Black
to
Black
120 VAC
Line In
White
to
White
Green to
Green
11” (27.9 cm)
dia. hole
Guide
Hole
91
/
8”
(23.2 cm)
71
/
4” (18.4 cm)
11
/
4” (3.2 cm)
Dia. Hole
12 7/8”
(32.7 cm)
28 1/4”
(71.8 cm)
25” (63.5 cm)
10
3
/
4”
(27.3 cm)
WALL CUTOUT