LG ARUM160LTE5.EWGBLEU Manuel d'utilisateur télécharger pdf (Page 24)

ENGLISH

(Table 2) Refrigerant pipe diameter from outdoor unit to first branch. (A)

ODU

capacity

(hp)

Pipe diameter when pipe

length is < 90m (295ft)

(Standard)

Pipe diameter when pipe

length is ≥ 90m (295ft)

Pipe diameter when height differ-

ential (ODU÷IDU) is > 50m (164ft)

Liquid Pipe

mm (inch)

Gas Pipe

mm (inch)

Liquid Pipe

mm (inch)

Gas Pipe

mm (inch)

Liquid Pipe

mm (inch)

Gas Pipe

mm (inch)

Ø9.52 (3/8) Ø19.05 (3/4) Ø12.7 (1/2) Ø22.2 (7/8) Ø12.7 (1/2) Not increased

Ø9.52 (3/8) Ø22.2 (7/8) Ø12.7 (1/2) Ø28.58 (1-1/8) Ø12.7 (1/2) Not increased

12~16

Ø12.7 (1/2) Ø28.58 (1-1/8) Ø15.88 (5/8) Ø34.9 (1-3/8) Ø15.88 (5/8) Not increased

18~22

Ø15.88 (5/8) Ø28.58 (1-1/8) Ø19.05 (3/4) Ø34.9 (1-3/8) Ø19.05 (3/4) Not increased

Ø15.88 (5/8) Ø34.9 (1-3/8) Ø19.05 (3/4) Ø41.3 (1-5/8) Ø19.05 (3/4) Not increased

26~34

Ø19.05 (3/4) Ø34.9 (1-3/8) Ø22.2 (7/8) Ø41.3 (1-5/8) Ø22.2 (7/8) Not increased

36~60

Ø19.05 (3/4) Ø41.3 (1-5/8) Ø22.2 (7/8) Ø44.5 (1-3/4) Ø22.2 (7/8) Not increased

62~64

Ø22.2 (7/8) Ø44.5 (1-3/4) Ø25.4 (1) Ø53.98 (2-1/8) Ø25.4 (1) Not increased

66~96

Ø22.2 (7/8) Ø53.98 (2-1/8) Ø25.4 (1) Ø53.98 (2-1/8) Ø25.4 (1) Not increased

Outdoor unit Connection

WARNING

• In case of pipe diameter B connected after first branch is bigger

than the main pipe diameter A, B should be of the same size

with A.

Ex) In case indoor unit combination ratio 120% is connected to

70kW outdoor unit.

1) Outdoor unit main pipe diameter A : Ø34.9(1-3/8))(Low

pressure gas pipe), Ø15.88(5/8)(liquid pipe), Ø28.58(1-

1/8)(High Pressure liquid pipe)

2) Pipe diameter B after first branch according to 120% in-

door unit combination(84kW) : Ø34.9(1-3/8)(Low pressure

gas pipe), Ø19.05(3/4)(liquid pipe), Ø28.58(1-1/8)(High

Pressure liquid pipe)

Therefore, pipe diameter B connected after first branch

would be Ø34.9(1-3/8)(Low pressure gas pipe),

Ø15.88(5/8)(liquid pipe), Ø28.58(1-1/8)(High Pressure liq-

uid pipe) which is same with main pipe diameter.

[Example]

Do not choose the main pipe diameter by downward indoor unit

total capacity but its outdoor unit model name.

Do not let the connection pipe from branch to branch exceed the

main pipe diameter chosen by outdoor unit model name.

EX) Where connecting the indoor units to the 22 HP (61.5 kW)

outdoor unit to 120% of its system capacity (73.8 kW) and

branching 7k (2.1kW) indoor unit at the 1st branch

Main pipe diameter(22 HP outdoor unit): Ø28.58(1-1/8)(Low pres-

sure gas pipe), Ø15.88(5/8)(Liquid pipe), Ø22.2(7/8)(High pressure

gas pipe)

Pipe diameter between 1st and 2nd branch (71.7kW indoor units):

Ø34.9(1-3/8)(Gas pipe) Ø19.05(3/4)(Liquid pipe) in conformity with

Downward indoor units.

Since the main pipe diameter of 22HP outdoor unit is Ø28.58(1-

1/8)(Low pressure gas pipe), Ø15.88(5/8)(Liquid pipe), Ø22.2(7/8)

(High pressure gas pipe) is used as the main pipe and the connec-

tion pipe between 1st and 2nd branch.

Indoor Unit Connection

Indoor Unit connecting pipe from branch (a,b,c,d,e,f)

Indoor Unit capacity

[kW(Btu/h)]

Liquid pipe

[mm(inch)]

Gas pipe [mm(inch)]

≤ 5.6(19,100)

Ø6.35(1/4) Ø12.7(1/2)

< 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8)

< 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4)

< 28.0(95,900) Ø9.52(3/8) Ø22.2(7/8)

(Table 3) Refrigerant pipe diameter from first branch to last branch (B,C,D)

Downward indoor unit

total capacity [kW(Btu/h)]

Liquid pipe

[mm(inch)]

Gas pipe

[mm(inch)]

≤ 5.6(19,100)

Ø6.35(1/4) Ø12.7(1/2)

< 16.0 (54,600) Ø9.52(3/8) Ø15.88(5/8)

≤ 22.4 (76,400)

Ø9.52(3/8) Ø19.05(3/4)

< 33.6 (114,700) Ø9.52(3/8) Ø22.2(7/8)

< 50.4 (172,000) Ø12.7(1/2) Ø28.58(1-1/8)

< 67.2 (229,400) Ø15.88(5/8) Ø28.58(1-1/8)

< 72.8(248,500) Ø15.88(5/8) Ø34.9(1-3/8)

< 100.8(344,000) Ø19.05(3/4) Ø34.9(1-3/8)

< 173.6(592,500) Ø19.05(3/4) Ø41.3(1-5/8)

< 184.8(630,700) Ø22.2(7/8) Ø44.5(1-3/4)

≤ 224.0(764,400)

Ø22.2(7/8) Ø53.98(2-1/8)

(Table 4) Conditional Application

WARNING

• In case of pipe diameter B connected after first branch is bigger

than the main pipe diameter A, B should be of the same size

with A.

Ex) In case indoor unit combination ratio 120% is connected to

24HP(67.2 kW) outdoor unit.

1) Outdoor unit main pipe diameter A : Ø34.9(1-3/8)(Gas pipe),

Ø15.88(5/8)(liquid pipe)

2) Pipe diameter B after first branch according to 120% indoor

unit combination(80.6kW) : Ø34.9(1-3/8)(gas pipe),

Ø19.05(3/4)(liquid pipe)

Therefore, pipe diameter B connected after first branch

would be Ø34.9(1-3/8)(gas pipe) / Ø15.88(5/8)(liquid pipe)

which is same with main pipe diameter.

Condition Example

Diameter of pipes be-

tween first branch and the

last branch should be in-

creased by one step, ex-

cept pipe diameter B,C,D

is same as Diameter A

40 m [131 ft] <

B+C+D+e

90 m [295 ft]

’

B, C, D

Change a diameter

While calculating whole re-

frigerant pipe length, pipe

B,C,D length should be cal-

culated twice.

A+Bx2+Cx2+Dx2

+a+b+c+d+e

≤

1 000 m [3 281 ft]

Length of pipe from each

indoor unit to the closest

branch

a,b,c,d,e

≤

40 m

[131 ft]

Length of pipe from out-

door unit to the farthest

indoor unit 5

(A+B+C+D+e)] - [Length

of pipe outdoor unit to the

closest indoor unit 1

(A+a)]

≤

40 m [131 ft]

(A+B+C+D+e)-

(A+a) ≤ 40 m

[131 ft]

• To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.

Ø6.35(1/4) ’ Ø9.52(3/8), Ø9.52(3/8) ’

Ø12.7(1/2), Ø12.7(1/2) ’ Ø15.88(5/8),

Ø15.88(5/8) ’ Ø19.05(3/4), Ø19.05(3/4) ’

Ø22.2(7/8), Ø22.2(7/8) ’ Ø25.4(1),

Ø25.4(1) ’ Ø28.58(1-1/8), Ø28.58(1-1/8) ’

Ø31.8(1-1/4), Ø31.8(1-1/4) ’ Ø34.9(1-3/8),

Ø34.9(1-3/8) ’ Ø38.1(1-1/2)

h 40 m [131 ft]

H 110 m [361 ft]

Indoor

Unit

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LG ARUM160LTE5.EWGBLEU Manuel d'utilisateur Page 24

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