Viking DEV1500 Manuel D'instructions page 2

PREPARE THE INSTALLATION
LOCATION
ROOF INSTALLATIONS
. Locate the blower on the rear slope of the roof. Place it
in a location to minimize duct run. The location should
be free of obstacles (T.V. leads, electrical lines, etc.). If
the blower top is level with the roof peak, it will not be
seen from the street. Keep this approximate location
in mind as you work from within the attic.
2. mark and drill a guide hole centered between roof
rafters.
Ø
Ø
1¼" dia. hole
REMOVE SHINGLES
12 / "
11
16
Guide hole
(centered
between rafters)
12
3. From the outside, use the guide hole as a starting point
to lay out the installation:
A. Use a T-square to measure 2
guide hole, then up 2
corner of the layout.
B. Starting from the top-left corner, mark the rectan-
gular cutout (2" W x 20½" H) and remove only the
shingles in this area.
C. mark an 11" diameter hole centered on the guide
hole. Cut this hole through the roof board(s).
D. mark and cut a 1¼" diameter hole through the roof
board(s) where shown.
2 "
4. For flat roof installations, build a curb that will mount
the blower at a minimum pitch of 2/2. Discharge end
of the blower should be pointed away from prevailing
18"
1"
20½"
11" dia.
hole
/ "
5
8
21"
/ " to the left of the
5
8
/ " to locate the top-left

6
PREPARE THE INSTALLATION
LOCATION
winds.
. Choose a position on the outside wall. make sure that
no wall studs, pipes or wires run through the opening
area.
2. From inside, mark and drill a guide hole centered
Ø
/
14
11
16
3. From the outside, use the guide hole as a starting point
to lay out the installation:
A. Use a T-square to measure 4
guide hole, then up 4
corner of the layout.
B. Starting from the top-left corner, mark the rectangular
cutout (25" W x 29½" H) and remove only the siding
in this area.
C. mark an 11" diameter hole centered on the guide
hole. Cut this hole through the roof board(s).
D. mark and cut a 1¼" diameter hole through the roof
board(s) where shown.
"
6 ¾
2
WALL INSTALLATIONS
Ø
20"
1¼" dia. hole
Guide hole
(centered between studs)
"
11" dia.
REMOVE
hole
SIDING
/
14 "
5
8
25"
/

6
3"
29½"
/ " to the left of the
5
8
" to locate the top-left