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BRANCH JOINT INSTALLATION MANUALSelection of refrigerant piping size and use of Branch Joint

Prepare the pipe to be connected in the field.

Determine the piping sizes of each part from table 3, 4, 5.

Determine the branch joint from table 1.

When pipe is cut with a pipe cutter or the like remove burr, dust and foreign materials inside the pipe

and connect the pipe.

Always weld while flowing nitrogen, otherwise, the product may not operate due to sludge within the

pipe.

1

2

3

4

5

Table 1. Branch Join Kit

Table 2. Contents of branch joint kit

Branch Joint

ContentsGas side:1EA

Liquid side:1EA

Gas side:1EA

Liquid side:1EA1EA

Insulation Manual

Table 3. Branch pipe for connection between Outdoor Units

Outdoor Units

2

3

Branch Joint pipe

ARCNN20

ARCNN20,ARCNN30

Downward Indoor Unit total capacity

[kW(Btu/h)]

< 5.6 (19,100)

< 16 (54,600)

< 22.4 (76,400)

< 33 (112,600)

< 47 (160,400)

< 71 (242,300)

< 104 (354, 900)

104 (354,900)

6.35(1/4)

9.52(3/8)

9.52(3/8)

9.52(3/8)

12.7(1/2)

15.88(5/8)

19.05(3/4)

19.05(3/4)

12.7(1/2)

15.88(5/8)

19.05(3/4)

22.2(7/8)

28.58(9/8)

28.58(9/8)

34.9(13/8)

41.3(15/8)

Liquid pipe

[mm(inch)]

Gas pipe

[mm(inch)]

Table 4. Refrigerant pipe diameter from branch to branch (Fig1.- B,C,D)

Table 5. Between branching and Indoor Unit (Fig1 -a,b,c,d,e)

Indoor Unit capacity [kW(Btu/h)]

< 5.6(19,100)

< 16.0(54,600)

< 22.4(76,400)

6.35(1/4)

9.52(3/8)

9.52(3/8)

12.7(1/2)

15.88(5/8)

19.05(3/4)

Liquid pipe

[mm(inch)]

Gas pipe

[mm(inch)]

Models Gas pipe Liquid pipe

For example. Indicated 9.52 is the outer diameter(O.D..) of field jointed piping

[unit:mm]

ARBLN03321

ARBLN07121

ARBLN14521

ARBLN01621

I.D. 12.7

I.D. 15.88

I.D. 15.88

I.D. 15.88

I.D12.7

I.D12.7

I.D9.52I.D9.52

I.D9.52

I.D6.35

I.D6.35

I.D6.35

I.D19.05 I.D19.05

I.D19.05

O.D19.05O.D19.05

I.D12.7

I.D12.7

I.D15.88

I.D15.88

I.D22.2

I.D22.2I.D22.2

I.D25.4

I.D25.4

I.D12.7I.D12.7

I.D12.7

I.D6.35

I.D9.52

I.D9.52

I.D9.52

I.D6.35

I.D28.58

I.D28.58I.D28.58

I.D31.8

I.D31.8

I.D19.05

I.D22.2

O.D22.2

I.D15.88

I.D15.88

I.D12.7

I.D22.2

I.D19.05

O.D19.05

I.D12.7I.D15.88 I.D15.88

I.D15.88

I.D19.05

I.D19.05

I.D19.05

I.D12.7

I.D12.7

I.D9.52

O.D12.7

O.D12.7

I.D9.52

I.D6.35

I.D34.9 I.D41.3

I.D38.1

O.D22.2

I.D19.05

I.D15.88 I.D12.7

O.D15.88

I.D41.3

I.D38.1

I.D41.3

O.D38.1

O.D34.9I.D34.9

I.D34.9

I.D22.2

I.D28.58

I.D28.58I.D38.1

O.D28.58

I.D22.2

I.D19.05

I.D15.88I.D19.05

I.D22.2

I.D22.2

O.D19.05

O.D15.88

I.D12.7

I.D9.52

I.D19.05

I.D15.88I.D22.2

I.D12.7

I.D15.88

I.D19.05

O.D12.7

I.D9.52

I.D6.35

I.D19.05

O.D15.88

I.D28.58

O.D25.4

I.D34.9

O.D31.8

I.D12.7

O.D9.52

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Figure1. Line Branch method

Insulation of Branch Joint

Fig. 2 Example Fig. 3 Example

Insulation material

(field spply)

Tape (field spply)

Lapped space of taping

Pipe cover

P/No.: 3850A25001K

Mount Liquid pipe 1 to pipe cover 2 in matching.Seal the joing section of pipe cover with inslatedsealing tape(field supply). (Refer to Fig. 2)

Apply the same procedures to the gas pipe also.

Note 1.

Note 2.

Apply insulation to all refrigerant piping (fieldsupply). When using the insulation materialsbeing marketed, employ heat resistant insulationmaterial (heat resistant temperature: 120C ormore)

As the pipe cover contracts slightly conducttaping in the field securely by providing lappedparts as shown in so that no gap will exit on thepiping cover and field supply insulation material.

Total pipe length = A+B+C+D+a+b+c+d+e 300m

: Outdoor Unit

: 1st branch (Y branch)

: Indoor Units

: Downward Indoor Unit

A

B

C

D

Total pipe length = A+B+C+D+a+b+c+d+e 300m

: Outdoor Unit

: 1st branch (Y branch)

: Indoor Units

: Downward Indoor Unit

A

B

C

D

Total pipe length = A+B+C+D+a+b+c+d+e 300m

Main

Sub

10m orless

A

B

C

D

E

: Outdoor Unit

: 1st branch (Y branch)

: Indoor Units

: Downward Indoor Unit

: Connection branch pipe between Outdoor Units: ARCNN20

Total pipe length = A+B+C+D+a+b+c+d+e 300m

A

B

C

D

E

F

10m orless

: Outdoor Unit

: 1st branch (Y branch)

: Indoor Units

: Downward Indoor Unit

: Connection branch pipe between Outdoor Units: ARCNN20

: Connection branch pipe between Outdoor Units: ARCNN30

Example) 5 Indoor Units connected Example) 5 Indoor Units connected Example) 5 Indoor Units connected Example) 5 Indoor Units connected

L50m

L150m

40m

h15m

L50m

L150m

40m 40m 40m

h15m

L50m

L150m

h15m

L50m

L150m

h15m

Longest p ipe length * Equivalent p ipe length

A+B+C+D+e 150m A+B+C+D+e 175m

Longest pipe length after 1st branch

B+C+D+e 40m

Difference in height(Outdoor Unit Indoor Unit)

H 50m (40m : Outdoor Unit is lower than Indoor Units)**

Difference in height (Indoor Unit Indoor Unit)

h 15m

L

l

H

h

Longest p ipe length * Equivalent p ipe length

A+B+C+D+e 150m A+B+C+D+e 175m

Longest pipe length after 1st branch

B+C+D+e 40m

Difference in height(Outdoor Unit Indoor Unit)

H 50m (40m : Outdoor Unit is lower than Indoor Units)**

Difference in height (Indoor Unit Indoor Unit)

h 15m

L

l

H

h

Longest p ipe length * Equivalent p ipe length

A+B+C+D+e 150m A+B+C+D+e 175m

Longest pipe length after 1st branch

B+C+D+e 40m

Difference in height(Outdoor Unit Indoor Unit)

H 50m (40m : Outdoor Unit is lower than Indoor Units)**

Difference in height (Indoor Unit Indoor Unit)

h 15m

L

l

H

h

Longest p ipe length * Equivalent p ipe length

A+B+C+D+e 150m A+B+C+D+e 175m

Longest pipe length after 1st branch

B+C+D+e 40m

Difference in height(Outdoor Unit Indoor Unit)

H 50m (40m : Outdoor Unit is lower than Indoor Units)**

Difference in height (Indoor Unit Indoor Unit)

h 15m

L

l

H

h

Insulation material

(field spply)

Tape (field spply)Liquid pipe