Broan Alta ALT3 Series Installation Use And Care Manual page 14

4 ] Drill a 1/8" dia. pilot hole for house wiring, at B location on template.
5 ] Use a sharp pencil or 1/8" drill bit to mark the locations for the appropriate duct access
6 ] Draw the border for the exhaust ducting by linking its marks (16 for round duct and 4 for
7 ] Install the proper installation brackets according to the type of cabinet (framed or frameless).
FRAMED CABINET
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holes (16 locations for 7" round duct, or 4 corner locations for rectangular duct). Remove the
template.
rectangular duct), then cut the opening in the cabinet bottom (vertical exhaust) or in the wall
(horizontal exhaust). Drill the house wiring hole by using a 1½" hole saw centered with the
pilot hole previously made in 4.
See below.
Refer to the marking on brackets to determine the correct installation side and orientation.

Mate the corresponding bracket to the cabinet side frame, while placing rear end
of bracket against the wall. Use a pencil to mark 3 holes (there are 6 holes but only
3 are necessary).

Remove the bracket. Using a 7/64" drill bit, drill 3 holes where marked.

Assemble the bracket to the side frame using a Phillips screwdriver and 3 provided
no. 8 x 5/8" wood screws. Repeat for the other side frame.
7/64"