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PREPARE THE iNSTALLATiON
LOCATION
,
,
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.
Mark and drill a guide hole centered between roof
rafters,
,
From the outside, use the guide hole as a starting_point
to lay out the installation:
A. Use a T-square to measure 12s/8 '' to the left of the
guide hole, then u_p_ 1211/16 '. to locate the top-left
corner of the layout.
B. Starting from the top-left corner, mark the rectangu-
lar cutout (21" W x 20W' 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 11/_"diameter hole through the roof
board(s) where shown.
29-1/2
PREPARE THE iNSTALLATiON
LOCATION
1. 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
between wall studs.
,
From the outside, use the guide hole as a starting_point
to lay out the installation:
A. Use a T-square to measure 145/8 '' to the left of the
guide hole, then u_p_ 1411/18 `` to locate the top-left
corner of the layout.
B. Starting from the top-left corner, mark the rectangu-
lar cutout (25" W x 29V2" 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 wall.
D. Mark and cut a 11A"diameter hole through the wall
where shown.
4. For flat roof installations, build a curb that will mount the
blower at a minimum pitch of 2/12. Discharge end of the
blower should be pointed away from prevailing winds.
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