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Fig. 3-86
3-21. Suspending the Indoor Unit
Depending on the ceiling type:
• Insert suspension bolts as shown in Fig. 3-86
or
• Use existing ceiling supports or construct a suitable support as
shown in Fig. 3-87.
Hole-in-anchor
Hole-in-plug
Concrete Insert
Suspension bolt (M10 or 3/8")
(field supply)
Fig. 3-87
Fig. 3-88
Ceiling tiles
Ceiling suppor t
Suspension bolt
Suspension lug
Nuts and washers
(use for upper and lower)
Double nuts
Notch
WARNING
It is important that you use extreme care
in supporting the indoor unit inside the
ceiling. Ensure that the ceiling is strong
enough to support the weight of the unit.
Before hanging the unit, test the strength
of each attached suspension bolt.
(1) When placing the unit inside the ceiling, determine the pitch of
the suspension bolts referring to the dimensional data on the
previous page. (Fig. 3-84 and Table 3-3)
Tubing must be laid and connected inside the ceiling when
suspending the unit. If the ceiling is already constructed, lay the
tubing into position for connection to the unit before placing the
unit inside the ceiling.
(2) Screw in the suspension bolts allowing them to protrude from
the ceiling as shown in Fig. 3-86. (Cut the ceiling material, if nec-
essary.)
(3) Thread the 3 hexagonal nuts and 2 washers (field supply) onto
each of the 4 suspension bolts as shown in Figs. 3-88 and 3-89.
Use 1 nut and 1 washer for the upper part, and 2 nuts and 1
washer for the lower part, so that the unit will not fall off the
suspension lugs.
●
Fig. 3-90 shows an example of installation.
Air outlet duct
Air-outlet grille
Ceiling material Indoor unit
Bolt anchor
Suspension bolt
Air-intake duct
Air-intake grille
Suspension bolt
Hexagonal nut
Double nuts
Fig. 3-89
Fig. 3-90