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3.3.2. Installing hangers
Suspend the indoor unit by referring to the following figures.
ARUH 72
17-11/16 (450)
2-9/16 (65)
ARUH 96
21-5/8 (550)
2-9/16 (65)
Hanging bolt M10
(locally purchased)
Washer
(accessories)
Fasten the unit securely with special nuts A and B.
3.3.3. Leveling
Use the procedure in the following figure to adjust the levelness.
(Front)
Level
B
The side of the unit that holds the drain port (A) should be slightly lower than the opposite
side of the unit (B). The slant should allow from 0 to 3/4 in (0 to 20 mm) of difference
between (A) and (B).
Unit: in (mm)
62-1/2 (1587)
55-1/2 (1410)
AIR
Inlet port
Outlet port
AIR
AIR
Unit: in (mm)
62-1/2 (1587)
55-1/2 (1410)
AIR
Inlet port
Outlet port
AIR
AIR
Special nut A
(accessories)
Hanger
Special nut B
(accessories)
CAUTION
(Side)
Level
A
B
Main drain port
Safety drain port
3.3.4. Mounting the duct
Follow the procedure in the following figure to install the ducts.
ARUH 72
*13/16
14-9/16
(20)
(370)
7-1/2
(190)
12-5/8
(320)
13-3/4
*1
(350)
(25)
ARUH 96
*13/16
18-1/2
(20)
(470)
11-7/16
(290)
12-5/8
(320)
13-3/4
(350)
*4-15/16 (125)
* Spacing between flange and safety drain pan.
To prevent people from touching the parts inside the unit, be sure to install grilles on
the inlet and outlet ports. The grilles must be designed in such a way that cannot be
removed without tools.
Set the external static pressure between 0 to 1.2 in WG (0 to 300 Pa).
If an intake duct is installed, take care not to damage the temperature sensor (the
temperature sensor is attached to the intake port flange).
Install the air inlet
grille for air circula-
tion. The correct
temperature cannot
be detected.
A
When connecting the duct, perform duct-insulation that is appropriate for the installing
environment.
Inappropriate insulation work may cause condensation on the surface of the insulating
material, and may lead condensation drip.
Be sure to install the air filter in the air inlet. If the air filter is not installed, the heat
exchanger may be clogged and its performance may decrease.
9/16
(15)
3-9/16
49-3/16 (1250)
(90)
Inlet port flange
6-5/16
(160)
Outlet port flange
P5-7/8 (150) × 7
9/16
= 41-5/16 (1050)
(15)
2-15/16 (75)
1-3/8
(35)
47-1/4 (1200)
9/16
(15)
49-3/16 (1250)
3-9/16
(90)
Inlet port flange
6-5/16
(160)
Outlet port flange
P5-7/8 (150) × 7
9/16
= 41-5/16 (1050)
(15)
2-15/16 (75)
1-3/8
(35)
47-1/4 (1200)
CAUTION
Unit
Duct
(locally purchased)
Outlet grille
Inlet grille
(locally purchased)
(locally purchased)
(Room)
Unit: in (mm)
Unit: in (mm)
En-4
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