LG ARUM160LTE5.EWGBLEU Manuel d'utilisateur télécharger pdf (Page 17)

ENGLISH

Caution

1 Use the following materials for refrigerant piping.

- Material: Seamless phosphorous deoxidized copper pipe

- Wall thickness : Comply with the relevant local and national regula-

tions for the designed pressure 3.8 MPa (551 psi).

We recommend the following table as the mini-

mum wall thickness.

[Reducers for indoor unit and HR unit]

Unit : mm (inch)

Models

High pressure

–

Gas pipe

Low pressure

Liquid pipe

Indoor unit

reducer

HR unit

reducer

PRHR022

PRHR022A

OD22.2(7/8)Ø19.05(3/4) Ø15.88(5/8)

OD15.88(5/8) Ø

12.7(1/2)

Ø6.35(1/4)OD9.52(3/8)

OD19.05(3/4) Ø15.88(5/8)

OD12.7(1/2) Ø9.52(3/8)

Ø12.7(1/2)

OD22.2(7/8) Ø19.05(3/4)Ø15.88(5/8)

OD15.88(5/8) Ø12.7(1/2)

PRHR032,

PRHR042

PRHR032A,

PRHR042A

OD19.05(3/4) Ø15.88(5/8)

OD28.58(1-1/8) Ø22.2(7/8) Ø19.05(3/4)

OD15.88(5/8) Ø12.7(1/2) Ø9.52(3/8)

OD15.88(5/8) Ø12.7(1/2)

Outer diameter

[mm(inch)]

6.35

(1/4)

9.52

(3/8)

12.7

(1/2)

15.88

(5/8)

19.05

(3/4)

22.2

(7/8)

25.4

(1)

28.58

(1-1/8)

31.8

(1-1/4)

34.9

(1-3/8)

38.1

(1-1/2)

41.3

(1-5/8)

44.45

(1-3/4)

53.98

(2-1/8)

Minimum thick-

ness [mm(inch)]

0.8

(0.03)

0.8

(0.03)

0.8

(0.03)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

0.99

(0.04)

1.1

(0.04)

1.21

(0.05)

1.35

(0.05)

1.43

(0.06)

1.55

(0.06)

2.1

(0.08)

6 If the diameters of the branch piping of the designated refrigerant

piping differs, use a pipe cutter to cut the connecting section and

then use an adapter for connecting different diameters to connect

the piping.

7 Always observe the restrictions on the refrigerant piping (such as

rated length, difference in height, and piping diameter).

Failure to do so can result in equipment failure or a decline in heat-

ing/cooling performance.

8 A second branch cannot be made after a header. (These are shown

by .)

To Outdoor Unit

Sealed Piping

9 The Multi V will stop due to an abnormality like excessive or insuffi-

cient refrigerant. At such a time, always properly charge the unit.

When servicing, always check the notes concerning both the piping

length and the amount of additional refrigerant.

10 Never perform a pump down. This will not only damage the com-

pressor but also deteriorate the performance.

11 Never use refrigerant to perform an air purge. Always evacuate air

by using a vacuum pump.

12 Always insulate the piping properly. Insufficient insulation will re-

sult in a decline in heating/cooling performance, drip of condensate

and other such problems.

13 When connecting the refrigerant piping, make sure the service

valves of the Outdoor Unit is completely closed (the factory set-

ting) and do not operate it until the refrigerant piping for the Out-

door and Indoor Units has been connected, a refrigerant leakage

test has been performed and the evacuation process has been

completed.

14 Always use a non-oxidizing brazing material for brazing the parts

and do not use flux. If not, oxidized film can cause clogging or

damage to the compressor unit and flux can harm the copper pip-

ing or refrigerant oil.

WARNING

When installing and moving the air conditioner to another site, be

sure to make recharge refrigerant after perfect evacuation.

• If a different refrigerant or air is mixed with the original refriger-

ant, the refrigerant cycle may malfunction and the unit may be

damaged.

• After selecting diameter of the refrigerant pipe to suit total ca-

pacity of the indoor unit connected after branching, use an appro-

priate branch pipe set according to the pipe diameter of the

indoor unit and the installation pipe drawing.

2 Commercially available piping often contains dust and other materi-

als. Always blow it clean with a dry inert gas.

3 Use care to prevent dust, water or other contaminants from entering

the piping during installation.

4 Reduce the number of bending portions as much as possible, and

make bending radius as big as possible.

5 Always use the branch piping set shown below, which are sold sep-

arately.

Y branch

Header

4 branches 7 branches 10 branches

ARBLB01621, ARBLB03321,

ARBLB07121, ARBLB14521,

ARBLB23220

ARBL054 ARBL057 ARBL1010

ARBL104 ARBL107 ARBL2010

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LG ARUM160LTE5.EWGBLEU Manuel d'utilisateur Page 17

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