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3-12. Suspending the Indoor Unit
Depending on the ceiling type:
• Insert suspension bolts as shown in the diagram
or
• Use existing ceiling supports or construct a suitable
support as shown in the diagram.
It is important that you use
extreme care in supporting
WARNING
the indoor unit inside the ceil-
ing. Ensure that the ceiling is
strong enough to support the
weight of the unit. Before hang-
ing 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. Tubing must
be laid and connected inside the ceiling when sus-
pending 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 pro-
trude from the ceiling as shown in the diagram. (Cut
the ceiling material, if necessary.)
(3) Thread the 3 hexagonal nuts and 2 washers (field
supply) onto each of the 4 suspension bolts as shown
in the diagram. 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.
Suspension bolt
Hexagonal nut
Double nuts
Fig. 3-26
(4) Adjust the height of the unit.
(5) Check the unit is horizontally level.
CAUTION
●
Make sure the unit is installed level using a level
or a plastic tube filled with water. In using a plastic
tube instead of a level, adjust the top surface of the
unit to the surface of the water at both ends of the
plastic tube and adjust the unit horizontally. (One
thing to watch out for in particular is if the unit is
installed so that the slope is not in the direction of
the drain piping, this might cause leaking.)
(6) Tighten the upper nut.
Hole-in-anchor
Hole-in-plug
Concrete
Insert
Suspension bolt (M10 or 3/8")
Fig. 3-24
Ceiling tiles
Ceiling support
Fig. 3-25
Suspension bolt
Suspension lug
Nuts and washers
(use for upper and lower)
Notch
Double nuts
Fig. 3-27
Level
Vinyl tube
Fig. 3-28
Page 17
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