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3. Installing the indoor unit
3.2.5. Indoor unit preparation (Fig. 3-5)
1. Install the suspending bolts. (Procure the W 3/8 or M10 bolts locally.)
Predetermine the length from the ceiling (
within 3-15/16 in. (100 mm)).
Ceiling surface
Suspending bolt
Suspending bracket
2. Remove the intake grille.
Slide the intake grille holding knobs (at 2 or 3 locations) backward to open the
intake grille.
3. Remove the side panel.
Remove the side panel holding screws (1 in each side, right and left) then slide
the side panel forward for removal.
Intake grille
Slide the side panel forward.
Intake grille holding knob
Side panel
Slide
Remove the side panel holding screws.
Hinge
Remove the protective vinyl of vane.
Pushing the hinge, pull out the intake grille.
Forcing open the intake grille or opening it to an angle of more than 120° may
damage the hinges.
3.3. Installing the indoor unit (Fig. 3-6)
Use a proper suspending method depending on the presence or absence of ceiling
materials as follows.
In the presence of ceiling materials
1
Ceiling
In the absence of ceiling materials
2
Suspending bolt
/
Suspending bracket
3
Washer
0
Unit
4
Washer (Local procurement)
5
Double nuts
1) Directly suspending the unit
Installing procedures
1. Install the washer
(supplied with the unit) and the nuts (to be locally procured).
2. Set (hook) the unit through the suspending bolts.
3. Tighten the nuts.
Check the unit installing condition.
• Check that the unit is horizontal between the right and left sides.
• Check that the front and the rear of suspending brackets are horizontal.
(To keep drainage, the unit is inclined to the suspending brackets. The unit
slopes continuously downward from the front to the rear is the right installation
position.)
2)
Installing the suspending bracket first onto the ceiling (Fig. 3-7)
Installing procedures
1. Remove the suspending brackets and U-shaped washers from the unit.
2. Adjust the suspending bracket holding bolts on the unit.
3. Attach the suspending brackets to the suspending bolts.
4. Check that the suspending brackets are horizontal (front and rear/right and left).
5. Set (hook) the unit to the suspending brackets.
6. Tighten fixed bolts of the suspending brackets.
+
Be sure to install the U-shaped washers.
Suspending bracket holding bolt
Unit
U-shaped washer
Suspending bolt
Washer
Double nuts
(inch)
A24,30 47 - 5/10
A36,42 59 - 7/8
3.2.4. Fresh air intake hole (Fig. 3-4)
At the time of installation, use the duct holes (knock out) located at the positions
shown in following diagram, as and when required.
Indoor unit
Fresh air intake hole (knock out hole)
Filter
in. (mm)
ABC
10-3/16
(259.5)
ø 3-15/16
(ø 100)
4-5/16
(109)
(inch)
/ 5
3
5
3
4
22
0
25/64-25/32
2
1
3
5
/
0
1/4-15/32
A
B
C
Fig. 3-5
Fig. 3-6
Fig. 3-7
Fig. 3-4