AirStage ASUB36TLAV1 Manual de instalación - Página 6

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4/7/9 model

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

more than 2 in (35 mm) from the wall.

30/36 model

(4) Bend the connection piping at the bend radius of 4 in (100 mm) or more and install

no more than 2 in (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

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 0.04 oz/100 ft (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 [in (mm)]

1/4 (6.35)

3/8 (9.52)

1/2 (12.70)

5/8 (15.88)

3/4 (19.05)

En-5

Top hooks

Wall hook

bracket

Bottom hooks

Top hooks

Wall hook

bracket

Bottom hooks

Indoor unit

Spacer

Wall hook bracket

CAUTION

Thickness [in (mm)]

0.032 (0.80)

0.039 (1.00)

0.039 (1.20)

4.2. Pipe requirement

Refer to the installation manual for the outdoor unit for description of allowable pipe

length and height difference.

Use pipe with water-resistant heat insulation.

Install heat insulation around both the gas and liquid pipes. Failure to do so may cause

water leaks.

Use heat insulation with heat resistance above 248 °F (120 °C). (Reverse cycle model

only)

In addition, if the humidity level at the installation location of the refrigerant piping is

expected to exceed 70 %, install heat insulation around the refrigerant piping. If the

expected humidity level is 70 to 80 %, use heat insulation that is 9/16 in (15 mm) or

thicker and if the expected humidity exceeds 80 %, use heat insulation that is 13/16 in

(20 mm) or thicker. If heat insulation is used that is not as thick as specified, condensa-

tion may form on the surface of the insulation. In addition, use heat insulation with heat

conductivity of 0.045 W/(m·K) or less (at 68 °F (20 °C))

4.3. Flare connection (pipe connection)

Tighten the flare nuts with a torque wrench using the specified tightening method. Oth-

erwise, the flare nuts could break after a prolonged period, causing refrigerant to leak

and generate hazardous gas if the refrigerant comes into contact with a flame.

4.3.1 Flaring

Use special flare tool exclusive for R410A.

(1) Cut the connection pipe to the necessary length with a pipe cutter.

(2) Hold the pipe downward so that cuttings will not enter the pipe and remove any burrs.

(3) Insert the flare nut (always use the flare nut attached to the indoor and outdoor units

(or RB unit) respectively) onto the pipe and perform the flare processing with a flare

tool. Use the special R410A flare tool. Leakage of refrigerant may result if other flare

nuts are used.

(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from

entering the pipes.

Check if [L] is flared uniformly

and is not cracked or scratched.

Dimension A [in (mm)]

Pipe outside diameter

Flare tool for R410A,

[in (mm)]

1/4 (6.35)

3/8 (9.52)

1/2 (12.70)

5/8 (15.88)

3/4 (19.05)

When using conventional (R22) flare tools to flare R410A pipes, the dimension A should

be approximately 0.02 in (0.5 mm) more than indicated in the table (for flaring with R410A

flare tools) to achieve the specified flaring. Use a thickness gauge to measure the dimen-

sion A. It is recommended that a R410A flaring tool is used.

Pipe outside diameter

[in (mm)]

Width across flats

1/4 (6.35)

3/8 (9.52)

1/2 (12.70)

5/8 (15.88)

3/4 (19.05)

4.3.2 Bending pipes

• The pipes are shaped by your hands or pipe bender. Be careful not to collapse them.

• Do not bend the pipes in an angle more than 90°.

• When pipes are repeatedly bent or stretched, the material will harden, making it difficult

to bend or stretch them anymore. Do not bend or stretch the pipes more than 3 times.

To prevent breaking of the pipe, avoid sharp bends.

If the pipe is bent repeatedly at the same place, it will break.

CAUTION

WARNING

Die

Pipe

Dimension B

[in (mm)]

clutch type

3/8 (9.1)

1/2 (13.2)

0 to 0.020

5/8 (16.6)

(0 to 0.5)

3/4 (19.7)

15/16 (24.0)

Width across flats of Flare nut

[in (mm)]

11/16 (17)

7/8 (22)

1 (26)

1-1/8 (29)

1-7/16 (36)

CAUTION

0 (0)

-0.015 (-0.4)