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3.3A. Installation the unit (Ceiling concealed type)

Install the air conditioner in a location which can withstand a load of at least 5 times the

weight of the main unit and which will not amplify sound or vibration. If the installation

location is not strong enough, the indoor unit may fall and cause injuries.

If the job is done with the panel frame only, there is a risk that the unit will come loose.

Please take care.

3.3A.1. UNIT INSTALLATION EXAMPLE (CEILING CONCEALED

TYPE)

Connect the locally purchased duct.

(1) Inlet side

• Connect the duct to the locally purchased inlet ﬂ ange.

• Connect the ﬂ ange to the body with the locally purchased tapping screws.

• Wind the inlet ﬂ ange connecting to the duct with the aluminum tape etc. to avoid the

air leakage.

When the duct is connected to inlet side, remove contained ﬁ lter and surely attach lo-

cally purchased ﬁ lter at inlet opening.

(2) Outlet side

• Connect the duct with adjusting inside of outlet ﬂ ange.

• Wind the outlet ﬂ ange connecting to the duct with the aluminum tape etc. to avoid the

air leakage.

• Insulate the duct to avoid the dew condensation.

Check that duct work does not exceed the range of external static pressure of equip-

ment.

Make sure to insulate ducts to avoid the dew condensation.

Make sure to insulate between ducts and walls if metal ducts are used.

Please explain handling and washing methods of locally purchased materials to the

customer.

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.

When connecting the duct to the outlet port of the indoor unit, be sure to insulate the

outlet port and the installation screws to prevent water from leaking around the port.

AR7/9/12/14/18 Model

Set the static pressure outside the unit to 0.36 in. WG (90 Pa) or less (the allowable

range is between 0 and 0.36 in. WG (0 and 90 Pa)).

Replace the cover as follows.

• Remove the screws, and then remove cover and fan guard.

• Install the cover with the screws as shown in the illustration below.

Model

AR7/9/12/14

AR18

WARNING

CAUTION

Screw

screw

Cover

Fan guard

Side Inlet - Side Outlet

Insulation material (Field supply)

Aluminum tape

Flange (Field supply)

Air

Duct

(Field supply)

Side Inlet - Side Outlet (Duct)

Insulation material (Field supply)

Aluminum tape

Flange (Field supply)

Air

Duct

Intake grille

(Field supply)

Bottom Inlet - Side Outlet

Duct (Field supply)

Air

Intake grille (Field supply)

Outlet side

Inlet side

4-9/32

(109)

AR7/9/12/14

25-19/32 (650)

P 7-7/8 (200) × 2 = 15-3/4 (400)

Intake grille

(Field supply)

Air

Flange (Field supply)

Aluminum tape

Tapping screw for

ﬂ ange connection

(M4 x 10mm /

Field supply)

Air

Unit: in. (mm)

31/32 (25)

1-3/8 (35)

P 7-7/8 (200)

5-1/8

19/32 (15)

2-3/4

(130)

(70)

Unit: in. (mm)

AR18

33-15/32 (850)

P 7-7/8 (200) × 3 = 23-5/8 (600)

En-4