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For RIGHT REAR or LEFT REAR piping

(The following figure is a front view of the indoor unit installation location.)

For LEFT REAR

piping

For RIGHT or LEFT piping

For LEFT

piping

For RIGHT BOTTOM or LEFT BOTTOM piping

For LEFT

BOTTOM

piping

182

Attach the wall pipe

Fasten with vinyl

tape

WARNING

If the wall pipe is not used, the

cable interconnecting the indoor

and outdoor units may touch

metal and cause electric leakage.

Wall cap*

3.6. Indoor unit installation

• Use the included and

fasten the indoor unit

at 4 locations (→)

each at top and the

middle of the unit.

• When the unit is set

to the wall, use the

wall hook bracket

and hook the top of

the indoor unit on the

indoor unit wall hook

bracket.

• Install it so that there

is no gap between

the indoor unit and

the wall.

Unit: mm

For RIGHT

REAR piping

Unit: mm

For RIGHT

piping

Unit: mm

For RIGHT

BOTTOM

piping

5 to 10 mm

low

Wall pipe*

* Locally

purchased

(Inside)

Wall

(Outside)

Unit: mm

703

Fix the indoor unit with 4 screws surely. If improperly installed, might cause to injury due

to the toppling or falling.

Install the indoor unit at the place that has adequate strength. Install the indoor unit so

that the installed unit can withstand the weight of adult body weight.

If improperly installed, might cause accidental injury due to the toppling or falling.

3.7. Installing the wall hook bracket

(1) Install the wall hook bracket so that it is correctly positioned horizontally and verti-

cally. If the wall hook bracket is tilted, water will drip to the floor.

(2) Install the wall hook bracket so that it is strong enough to support the weight of the

unit.

• Fasten the wall hook bracket to the wall with 5 or more screws through the holes near

the outer edge of the bracket.

• Check that there is no rattle at the wall hook bracket.

Leveling

method

Weight

Install the wall hook bracket level, both horizontally and vertically.

4. PIPE INSTALLATION

Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with

refrigerant R410A models. Also, when storing the piping, securely seal the openings by

pinching, taping, etc.

While welding the pipes, be sure to blow dry nitrogen gas through them.

4.1. Selecting the pipe material

Do not use existing pipes from another refrigeration system or refrigerant.

Use pipes that have clean external and internal sides without any contamination which

may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or water.

It is necessary to use seamless copper pipes.

Material : Phosphor deoxidized seamless copper pipes

It is desirable that the amount of residual oil is less than 40 mg/10 m.

Do not use copper pipes that have a collapsed, deformed, or discolored portion (es-

pecially on the interior surface). Otherwise, the expansion valve or capillary tube may

become blocked with contaminants.

Improper pipe selection will degrade performance. As an air conditioner using R410A

incurs pressure higher than when using conventional (R22) refrigerant, it is necessary to

choose adequate materials.

• Thicknesses of copper pipes used with R410A are as shown in the table.

• Never use copper pipes thinner than those indicated in the table even if they are avail-

able on the market.

Thicknesses of Annealed Copper Pipes (R410A)

Pipe outside diameter [mm (in)]

6.35 (1/4)

9.52 (3/8)

12.70 (1/2)

15.88 (5/8)

19.05 (3/4)

WARNING

Hook the indoor unit to the

wall hook bracket (2 positions)

CAUTION

Thickness [mm]

0.80

1.00

1.20

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