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En-3

3. INSTALLATION

WORK

Correct initial installation location is important because it is difficult to move unit after it is
installed.

3.1. Selecting an installation location

Decide the mounting position together with the customer as follows.

WARNING

Select installation locations that can properly support the weight of the indoor unit.
Install the units securely so that they do not topple or fall.

CAUTION

Do not install the indoor unit in the following areas:
• Area with high salt content, such as at the seaside. It will deteriorate metal parts, caus-

ing the parts to fail or the unit to leak water.

• Area filled with mineral oil or containing a large amount of splashed oil or steam, such

as a kitchen. It will deteriorate plastic parts, causing the parts to fail or the unit to leak
water.

• Area that generates substances that adversely affect the equipment, such as sulfuric

gas, chlorine gas, acid, or alkali. It will cause the copper pipes and brazed joints to
corrode, which can cause refrigerant leakage.

• Area that can cause combustible gas to leak, contains suspended carbon fibers or

flammable dust, or volatile inflammables such as paint thinner or gasoline. If gas leaks
and settles around the unit, it can cause a fire.

• Area where animals may urinate on the unit or ammonia may be generated.

Do not use the unit for special purposes, such as storing food, raising animals, growing
plants, or preserving precision devices or art objects.
It can degrade the quality of the preserved or stored objects.

Do not install where there is the danger of combustible gas leakage.

Do not install the unit near a source of heat, steam, or flammable gas.

Install the unit where drainage does not cause any trouble.

Install the indoor unit, power supply cable, transmission cable, and remote controller
cable at least 40 in (1 m) away from a television or radio receivers. The purpose of this
is to prevent TV reception interference or radio noise. (Even if they are installed more
than 40 in (1 m) apart, you could still receive noise under some signal conditions.)

If children under 10 years old may approach the unit, take preventive measures so that
they cannot reach the unit.

Take precautions to prevent the unit from falling.

(1) Install the indoor unit on a place having a sufficient strength so that it withstands

against the weight of the indoor unit.

(2) The inlet and outlet ports should not be obstructed; the air should be able to blow all

over the room.

(3)  Leave the space required to service the air conditioner.
(4)  Install the unit where connection to the outdoor unit (or RB unit) is easy.
(5)  Install the unit where the connection pipe can be easily installed.
(6)  Install the unit where the drain pipe can be easily installed.
(7)  Install the unit where noise and vibrations are not amplified.
(8)  Take servicing, etc., into consideration and leave the spaces. Also install the unit

where the filter can be removed.

(9) Do not install the unit where it will be exposed to direct sunlight.

3.2. Installation

dimension

For the drain hose exten-
sion, use a drain hose
with a 5/8 in (16 mm)
inside diameter.

71 in (1800
mm) or more

60 in (1500
mm) or
more

Right side 8
in (200 mm)
or more

3 in (60 mm) or more

Left side 2
in (50 mm)
or more

Wall hook bracket

3.3. Installing the unit

WARNING

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.

The piping can be connected in the 7 directions indicated by

and

Left piping

Right
piping

Bottom piping

Center piping

Left bottom piping

Left rear piping

Rear piping

3.3.1. Installing the wall hook bracket

WARNING

If the wall pipe is not used, the cable interconnecting the indoor and outdoor units may
touch metal and cause electric leakage.

[Installation directly to a wall]

Refer to Fig. A for the installation hole dimensions of the wall hook bracket.
Before fastening the wall hook bracket to the wall with the screws, level it by tapping the
hook at the center of bracket to the wall with the handle of a screwdriver.
(1) Fasten the wall hook bracket to the wall with 6 or more screws and anchor bolts

through the holes near the outer edge of the bracket.
(Do not install the wall hook bracket at only 1 place or at an angle.)

(2) For a concrete wall, embed anchor bolts (3/8 in (10 mm) dia.) into the wall at the wall

hook bracket holes.
(Allow the anchor bolts to stick out at least 11/16 in (18 mm) from the wall. Use 2
bolts for flat concrete wall and 4 bolts for blister concrete wall.)

(3) Install the nuts to the anchor bolts through the wall hook bracket.
(4) Finally tighten the bolts and wood screws after confirming, using the level indicator,

that the clamp is horizontal.

WARNING

Install the wall hook bracket level, both horizontally and vertically. If the wall hook
bracket is tilted, wa ter will drip to the floor.

As the weight of the indoor unit is 33 to 40 lbs (15 to 18 kg), it should be installed after
properly examining the place where it is in tended to be in stalled. If the place is not
strong enough, a plank or girder should be used to make the place sufficiently strong so
that the wall can support the weight.

Fig. A

17-5/16 (439)

4-13/16

(122)

2-15/16

(75)

2-15/16

(75)

1-7/16

(37)

Ø 3-1/8

(80)