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Step 1. Place Part B
against the wall with the grille facing outward and mark the cutout to
be made with a pencil by tracing the pipe on the outside. Make sure
that the power cord is on the downside.
Step 2. Cut out the circular
opening with a small drywall saw. Cut inside the pencil line. Take
care not to damage the edge of the drywall since you will be
installing drywall anchors close to the hole to mount the grill.
Step 3. Project the edge of the cutout onto the inside of the
other wall board in three places, approximately 120° apart. Use a
small square or a small piece of cardboard that has an exact 90°
angle to project the cutout alignment points on the inside of the
other wall. The two circular openings must be accurately aligned.
Step 4. Use a small sharp pin or
very small drill bit (1/32" or smaller) to punch or drill these
three marks to the outside of the other wall.
Step 5. Place the other sleeve,
Part C, against the outside of the wall and center its location using
the three markers that you have made and trace the outside of the
sleeve with a pencil. Cut the circular opening with a small drywall
saw. Cut inside the pencil line. Take care not to damage the edge of
the drywall since you will be installing drywall anchors close to the
hole to mount the grill.
Step 6. Insert Part C into the
cutout opening (fan suction side) and snug the flange up against the
wall material, making sure that the tabs in the flange are exactly on
top.
Step 7. Insert Part B into the
cutout opening (fan output side) and snug the grille up against the
wall material. Position such that the power cord is on the bottom.
Step 8. Place Part A over the
suction side metal sleeve C.
Step 9. Make sure that the power
cord strain relief is fully in the slot the grille.
Step 10. Mark the location of
the wall anchors. Drill the holes for the anchors with a sharp
3/16" drill bit. Make sure not to push the drill through the
wallboard. Gently let it drill through so that the drywall will not
crumble. Install wall anchors and screw the grille down snugly. DO
NOT OVER TIGHTEN.
Step 11. Install the output
grill remaining Part A the same way. Make sure that the grille ribs
are nicely square with the floor.
Step 12. Route the power cord
neatly along the baseboard to the electrical outlet using self
adhesive cord control clips or cord control channel available at Home
Centers and Hardware stores.
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