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INSTALLATION (Options)
Only For Qualified Installers
Installing the Floor Register
The blower box mounting bracket
is designed to allow mounting into an
existing floor. However, it is easier to in-
stall all components at the time of house
construction. The mounting bracket as-
sumes that floor joists are on 16” cen-
ters. The mounting bracket has break-off
tabs that are to be left on only if the floor
joists are too far apart to be reached with-
out them. To break off the tabs simply
bend them back and forth until they
break. The following instructions are for
installing in an existing floor.
1. Cut a 7
1
/
2
x 13
7
/
8
hole in the floor at
the proper location. The hole must
be perpendicular to the floor joists.
2. Place the mounting bracket in the
hole as shown. The tapered end of
the bracket must be opposite to the
side where the air will enter the
blower box.
3. Place the blower box with blower
assembly removed, down into the
bracket, angling it as shown. Slide
the blower box down into the
bracket as far as needed to tilt it
level. Then slide the box in position
and attach the duct work (not
shown). Install the box mounting
screws.
4. Insert the electrical wires for the
blower into the box through one of
the two holes provided.
5. Using wire nuts, connect the wires to
the motor and speed control as
shown on the wiring diagram.
Mounting Screws
Breakoff Tabs
Tilt Blower Box