AirStage AJY054LBLAH Kurulum Kılavuzu - Sayfa 8

Klima AirStage AJY054LBLAH için çevrimiçi göz atın veya pdf Kurulum Kılavuzu indirin. AirStage AJY054LBLAH 19 sayfaları. Outdoor unit

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5.4. Pipe connection

Do not use mineral oil on a ﬂ ared part. Prevent mineral oil from getting into the system

as this would reduce the lifetime of the units.

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

The maximum lengths of this product are shown in the table. If the units are further apart

than this, correct operation cannot be guaranteed.

5.4.1 Flaring

Use special pipe cutter and ﬂ are tool exclusive for R410A.

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

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

burrs.

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

respectively) onto the pipe and perform the ﬂ are processing with a ﬂ are tool. Leakage

of refrigerant may result if other ﬂ are 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 ﬂ ared uniformly

and is not cracked or scratched.

Dimension A [mm]

Pipe outside diameter

Flare tool for R410A,

[mm (in)]

6.35 (1/4)

9.52 (3/8)

12.70 (1/2)

15.88 (5/8)

19.05 (3/4)

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

be approximately 0.5 mm more than indicated in the table (for ﬂ aring with R410A ﬂ are

tools) to achieve the speciﬁ ed ﬂ aring. Use a thickness gauge to measure the dimension A.

It is recommended that a R410A ﬂ aring tool is used.

Pipe outside diameter

Width across

[mm (in)]

ﬂ ats

6.35 (1/4)

9.52 (3/8)

12.70 (1/2)

15.88 (5/8)

19.05 (3/4)

5.4.2 Bending pipes

To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of

curvature of 100 mm or more.

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

• If pipes are shaped by hand, be careful not to collapse them.

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

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

to bend or stretch them any more.

• Do not bend or stretch the pipes more than 3 times.

5.4.3 Pipe connection

Be sure to install the pipe against the port on the indoor unit and the outdoor unit cor-

rectly. If the centering is improper, the ﬂ are nut cannot be tightened smoothly.

If the ﬂ are nut is forced to turn, the threads will be damaged.

Do not remove the ﬂ are nut from the outdoor unit pipe until immediately before connect-

ing the connection pipe.

After installing the piping, make sure that the connection pipes do not touch the com-

pressor or outer panel. If the pipes touch the compressor or outer panel, they will vibrate

and produce noise.

(1) Detach the caps and plugs from the

pipes.

(2) Center the pipe against the port on the

outdoor unit, and then turn the ﬂ are nut

by hand.

(3) Tighten the ﬂ are nut of the connection

pipe at the outdoor unit valve connec-

tor.

(4) After tightening the ﬂ are nut by hand,

use a torque wrench to fully tighten it.

En-7

CAUTION

Die

Pipe

Dimension B

[mm]

clutch type

9.1

13.2

0 to 0.5

16.6

19.7

24.0

Width across flats of

Flare nut [mm]

CAUTION

3-way valve (Liquid)

Flare nut

Connection pipe

(Liquid)

Hold the torque wrench at its grip, keeping it in a right angle with the pipe, in order to

tighten the ﬂ are nut correctly.

Outer panel may be distorted if

fastened only with a wrench. Be

sure to ﬁ x the elementary part with a

holding wrench (spanner) and fasten

with a torque wrench (refer to below

diagram). Do not apply force to the

blank cap of the valve or hang a

wrench, etc., on the cap. If blank cap

is broken, it may cause leakage of

refrigerant.

Flare nut [mm (in)]

6.35 (1/4) dia.

9.52 (3/8) dia.

12.70 (1/2) dia.

15.88 (5/8) dia.

19.05 (3/4) dia.

In the case of AJ*054LBLAH

It is necessary to change a connection

pipe diameter by using Reducer.

(1) Reducer must be brazed in the

outside of the outdoor unit.

(2) Distance between 3-way valve and

reducer ≤ 1 m

(3) The part of Reducer do insulation

processing after brazing.

-0.4

5.4.4 Handling precautions for the valves

• Mounted part of Blank cap is sealed for protection.

• Fasten blank cap tightly after opening valves.

Operating the valves

• Use a hexagon wrench (size 4 mm).

Opening:

(1) Insert the hexagon wrench into the

valve shaft, and turn it counterclock-

wise.

(2) Stop turning when the valve shaft can

no longer be turned. (Open position)

Closing:

(1) Insert the hexagon wrench into the

valve shaft, and turn it clockwise.

(2) Stop turning when the valve shaft can

no longer be turned. (Closed position)

3-way valve

(Gas)

Flare nut

Connection

pipe (Gas)

CAUTION

Blank cap

Flare nut

Torque wrench

Holding

wrench

Tightening torque [N·m (kgf·cm)]

16 to 18 (160 to 180)

32 to 42 (320 to 420)

49 to 61 (490 to 610)

63 to 75 (630 to 750)

90 to 110 (900 to 1100)

Example: Case of front connection

Connection pipe (Gas)

(Pipe outside dia.:

19.05 mm (3/4 in)

Brazing

1 m or less

Reducer

Connection pipe (Gas)

(accessory)

(Pipe outside dia.:

15.88 mm (5/8 in))

Opening

direction

Opening

Hexagon wrench

direction

Seal

(blank cap

installation

portion)

Liquid

Gas pipe

pipe

90°

Torque

wrench