Installation Of Water Pipe - LG Multi V ARWN Series Installation Manual

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Installation manual (19 pages)

Table Of Contents

Table of Contents

Connection of Outside units

Outside units

Model

(Master)

(Slave1)

ARCNN21

2 Unit

I.D.31.8

(Master)

(Slave1)

(Slave2)

3 Unit

ARCNN31

I.D.41.3

(Master)

(Slave1)

(Slave2)

(Slave3)

4 Unit

ARCNN41

I.D.44.48 I.D.53.98

* Install the branch pipe between outside units so that the outlet pipe

is parallel to the surface.

Within +/- 10°

Viewed from point A

in direction of arrow

CAUTION

When installing the branch pipe vertically between the outside

units, the refrigerant can be uneven between the outside units,

leading to compressor burn and reduced capacity.

CAUTION

Use the following materials for refrigerant piping.

• Material: Seamless phosphorous deoxidized copper pipe

• Wall thickness : Comply with the relevant local and national regu-

lations for the designed pressure 3.8MPa. We

recommend the following table as the minimum

wall thickness.

Outer diameter

6.35 9.52 12.7 15.88 19.05 22.2 25.4 28.58 31.8 34.9 38.1 41.3 44.45 53.98

[mm]

Minimum

0.8 0.8 0.8 0.99 0.99 0.99 0.99 0.99 1.1 1.21 1.35 1.43 1.55 2.1

thickness [mm]

Commercially available piping often contains dust and other materi-

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

Use care to prevent dust, water or other contaminants from enter-

ing the piping during installation.

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

make bending radius as big as possible.

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

arately.

Y branch

ARBLB01621, ARBLB03321,

ARBLB07121, ARBLB14521,

ARBLB23220

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.

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.

Gas Pipe

Liquid Pipe

416

331

408

314

I.D.28.58

I.D.15.88

111

I.D.12.7

I.D.9.52

I.D.22.2

I.D.19.05

I.D.34.9

I.D.41.3 I.D.38.1 O.D.34.9

I.D.22.2 O.D.19.05

I.D.28.58

I.D.12.7

130

341

334

298

281

I.D.34.9

111

I.D.19.05

I.D.22.2

I.D.19.05

I.D.41.3

O.D.34.9

I.D.28.58

I.D.15.88

125

415

334

375

281

I.D.19.05

134

I.D.22.2

I.D.19.05

I.D.41.3

I.D.25.4

O.D.22.2

I.D.15.88

I.D.28.58

Execute the

welding while

pouring

nitrogen

Do not cut for

70mm or less

Header

4 branch

7 branch

10 branch

ARBL054

ARBL057

ARBL1010

ARBL104

ARBL107

ARBL2010

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

I.D.15.88

I.D.12.7

Ⓐ To Outside Unit

Ⓑ Sealed Piping

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.

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

pressor but also deteriorate the performance.

Never use refrigerant to perform an air purge. Always evacuate

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 Outside Unit is completely closed (the factory setting)

and do not operate it until the refrigerant piping for the Outside 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 dam-

age to the compressor unit and flux can harm the copper piping 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 refrigerant,

the refrigerant cycle may malfunction and the unit may be dam-

aged.

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

ity of the indoor unit connected after branching, use an appropriate

branch pipe set according to the pipe diameter of the indoor unit

and the installation pipe drawing.