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3-3. Placing the Unit Inside the Ceiling
This unit is equipped with a drain pump. Check with a tape measure or carpenter’s level.
Before installing the panel for cassette, complete the work of drain pipe and refrigerant
tube installation.
(1) When placing the unit inside the ceiling, determine the pitch of the suspension bolts using
the supplied full-scale installation diagram.
Tubing and wiring must be laid inside the ceiling when suspending the unit. If the ceiling is
already constructed, lay the tubing and wiring into position for connection to the unit before
placing the unit inside the ceiling.
(2) The length of suspension bolts must be appropriate for a distance between the bottom of the
bolt and the bottom of the unit of more than 18 mm.
Indoor unit
Ceiling
board
Full-scale installation diagram
(printed on top of container box)
Screw for attaching paper
(4 points)
Open the ceiling board as large as this
paper outline
Indoor unit
Ceiling board
12 ~ 17 mm
Over 18 mm
(3) Thread the 3 hexagonal nuts and 2 washers onto each of the 4 suspension bolts. Use 1 nut
and 1 washer for the upper side, and 2 nuts and 1 washer for the lower side, so that the unit
will not fall off the suspension lugs.
Nuts and washers
(use for upper and lower)
Double nut
12 ~ 17 mm
Notch
Suspension lug
Suspension bolt
(4) Adjust so that the distance between the unit and the ceiling bottom is 12 to 17 mm. Tighten
the nuts on the upper side and lower side of the suspension lug.
(5) If the protection tape for the fan during transportation remains, peel off the tape. (See
Section “1-2. Accessories Supplied with Unit”.)
(6) Check with a tape measure or carpenter’s level.
3-4. How to Process Tubing
See Section “5. HOW TO PROCESS TUBING”.
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