Install Instructions
1. Proceed to step 2 if ceiling is unfinished. If ceiling is finished use a stud finder to locate the inside edges of the joist/truss cavity the
ASLL will be installed between. Apply masking tape on ceiling along joist/trusses in the desired location ASLL will be installed in.
Make sure a proper analysis as noted above has taken place before cutting hole in ceiling. In the center of the tape cut a 3” x 3”
inspection hole to review the intended installation area using a flashlight and small mirror if necessary, (See Diagram B1).
NOTE: The following installation illustrations show the upper level floor with carpeting.
2. If floor above has carpeting it may be desirable to pull carpeting back if possible. If it is a good installation area, slowly drill a small
pilot hole with a 1/4” drill bit through the 3” x 3” inspection hole or center of joist/truss up through subfloor. Drill bit might cause car-
pet to unravel so be cautious. Once you go through subfloor reverse out of the hole. Use an extended screw driver or scratch awl
to push through the carpet above.
3. Place ASLL Blower Housing template center alignment hole over drill bit or screw driver. Align template cutout lines parallel with
baseboard and tape template to floor, (See Diagram C1). Use a utility knife and cut out carpeting and pad along Blower Housing
template lines denoted, (See Diagram D1).
4. Drill the 4 corners out on floor with a 3/8” drill bit and saw opening out using a jig saw or reciprocating saw. The final rough-in opening in
the floor for a Downflow application must measure 4 1/16” x 12 5/16” for Blower Housing. IMPORTANT: Rough-in openings must
not exceed dimensions provided or Blower Housing flange may fall through opening, (See Diagram E1).
5. Proceed to step 7 if ceiling below is unfinished. Using a 1/4” long drill bit, follow the corners of the Blower Housing cutout straight down
and drill 4 holes through the ceiling material below, (See Diagram F1). Connect the 4 holes on the ceiling below with a straight edge and
compare the dimensions on the ceiling to Outer Sleeve template dimensions which measure 4 5/16” x 12 5/16”, (See Diagram G1).
6. If ceiling is sheetrock use a sheetrock saw and follow the lines from step 5 and cut out ceiling opening, (See Diagram G1). If ceiling
is not sheetrock, use a jig saw or reciprocating saw. IMPORTANT: Both openings should be directly centered above one another.
7. Supply electrical power to side of ASLL where power will enter unit. See “Wiring” section for wiring specifics. Use provided strain
relief bushing for standard 14-2 w/ground NM-B nonmetallic sheathed cable (Romex) and snap into place in 7/8” knockout on
ASLL electrical box with about 6-8” of wire pushed into ASLL electrical box, (See Diagram H1).
8. Push wire up tight against ASLL Blower Housing and insert the ASLL blower through floor opening until flange meets floor, (See
Diagram I1).
9. If ceiling is sheetrock or ceiling tile, slide sheetrock mounting brackets over sheet rock ends. The 2 large holes in brackets must
face down, (See Diagram J1).
DIAGRAM B1 DIAGRAM C1 DIAGRAM D1
IF CEILING IS FINISHED, PLACE TAPE ALONG
JOIST/TRUSS. CUT A 3” INSPECTION HOLE TO
VERIFY IT IS A GOOD INSTALLATION LOCATION.
FOR A DOWNFLOW
APPLICATION CUT OUT
CARPET & ROUGH-IN OPENING USING BLOW-
ER HOUSING TEMPLATE (4 1/16” X 12 5/16”).
DIAGRAM E1
DRILL OUT CORNERS WITH 3/8” DRILL BIT.
IMPORTANT: ROUGH-IN OPENING FOR BLOWER
HOUSING MUST NOT EXCEED 4 1/16” X 12 5/16”.
DIAGRAM F1
IF CEILING BELOW IS FINISHED, DRILL (4) 1/4”
HOLES STRAIGHT DOWN THROUGH CEILING
USING EACH OF THE 4 CORNERS OF BLOWER
HOUSING CUT OUT AS A GUIDE.
PLACE ASLL BLOWER HOUSING TEMPLATE
CENTER ALIGNMENT HOLE OVER DRILL BIT OR
SCREW DRIVER.
DIAGRAM G1
CONNECT (4) HOLES WITH A STRAIGHT EDGE
AND MAKE SURE OUTER SLEEVE DIMENSIONS
MEASURE 4 5/16” X 12 5/16”. CUT OUT OPENING
WITH SHEETROCK OR JIG SAW.