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3.3.5 Forming the drain hose and pipe

Insert drain hose and drain cap securely. Drain should slope down to avoid water leak-

age.

When inserting the drain hose, no other material than water should be applied. Applica-

tion of other material than water will cause deterioration of the hose, and may cause

water leakage.

After you remove a drain hose, be sure to attach the drain cap.

When you secure the piping and drain hose with tape, arrange the drain hose so that it

is at the bottom of the piping.

For drain hose piping in low temperature environment, you need to apply freeze protec-

tion to prevent a frozen drain hose.

After cooling operation is performed in low temperature environment, (when outdoor

temperature under 0 °C,) water in the drain hose could be frozen. Frozen drain water

will block the water flow in the hose, and may cause water leakage at the indoor unit.

[For (A) Rear piping, (B) Right piping and (C) Bottom piping]

(1) Install the indoor unit piping in

the direction of the wall hole

and bind the drain hose and

pipe together with vinyl tape.

(2) Install the piping so that the

drain hose is at the bottom.

(3) Wrap the pipe of the indoor unit

that visible from the outside

with decorative tape.

(4) For right or bottom outlet

piping, cut off the piping outlet

cutting groove with a hacksaw.

[For (D) Left bottom piping, (E) Left piping and (F) Center piping, (G) Left rear

piping]

Insert the drain hose and drain cap into the drain port, making sure that it comes in con-

tact with the back of the drain port, and then mount it. If the drain hose is not connected

properly, leaking will occur.

(1) Interchange the drain cap and the drain hose.

• For left outlet piping, cut off

the piping outlet cutting groove

with a hacksaw.

• Remove the drain cap by pull-

ing at the projection at the end

of the cap with pliers, etc.

Right side

Drain hose removal and installation method of the 004/007/009 model

Removal

Screw

Drain hose

Drain fixture

Remove the screw at the left

Vertically insert the drain hose toward the inside, so that

of drain hose and pull out drain

the drain fixture can accurately align with the screw hole

hose.

around the drain cock. After inserting and before replac-

ing, reinstall and fix the removed screws.

Installing the drain cap

Use a hexagonal wrench 4 mm at opposite side to

No gap

insert the drain cap, till the drain cap contacts the

tip of drain cock.

Hexagonal

Drain cock

wrench

Drain cap

(2) Align the marks on the wall hook bracket and shape the connection pipe.

For left piping and left rear piping, align the marks on the wall hook bracket and

shape the connection pipe.

Wall hook

bracket

Connection

piping

Connection pipe

(Liquid pipe)

CAUTION

Bind with vinyl tape

Pipe (top)

Rear piping

Indoor unit drain hose

Bottom piping

(bottom)

CAUTION

Left side

Drain hose

Drain cap

Installation

Drain cock

Drain hose

Screw hole

Screw

Drain fixture

Alignment marks

Connection pipe (Gas pipe)

004/007/009 model

(3) Bend the connection piping at the bend radius of 70 mm or more and install no more

than 35 mm from the wall.

030/034 model

(4) Bend the connection piping at the bend radius of 100 mm or more and install no

more than 35 mm from the wall.

3.3.6 Installing the indoor unit

(1) After passing the indoor piping and drain hose through the wall hole, hang the indoor

unit on the hooks at the top and bottom of the wall hook bracket.

After hooking the indoor unit to the top hook, hook the fittings of the indoor unit to the

2 bottom hooks while lowering the unit and pushing it against the wall.

004/007/009 model

Indoor

unit

Bottom hooks

030/034 model

Indoor

unit

(Fitting)

(2) Insert the spacer, etc. between the

indoor unit and the wall hook bracket

and separate the bottom of the indoor

unit from the wall.

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)

Top hooks

Wall hook

bracket

Top hooks

Wall hook

bracket

Bottom hooks

Indoor unit

Spacer

Wall hook bracket

CAUTION

Thickness [mm]

0.80

1.00

1.20

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