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16
Branch pipe Fitting
Y branch
A
- Ensure that the branch pipes are attached horizontally or vertically
(see the diagram below.)
Horizontal
plane
A
Viewed from point A
in direction of arrow
Header
A
B
C
- When the number of indoor units to be connected to the branch
pipes is less than the number of branch pipes available for connection
then cap pipes should be fitted to the surplus branches.
- Fit branch pipe lie in a horizontal plane.
Horizontal plane
View from point B in the direction of the arrow
- Header should be insulated with the insulator in each kit.
Ⓐ To Branch Piping or Indoor Unit
B
Ⓑ To Outdoor Unit
Facing
downwards
Within ±10°
Within ±3°
Within ±3°
Ⓐ To Outdoor Unit
Ⓑ To Indoor Unit
- The indoor unit having larger ca-
pacity must be installed closer to
Ⓐ than smaller one.
- If the diameter of the refrigerant
piping selected by the proce-
dures described is different from
the size of the joint, the connect-
ing section should be cut with a
pipe cutter.
ⓒ Pipe cutter
- When the number of pipes to be
connected is smaller than the
number of header branches, in-
stall a cap to the unconnected
branches.
B
Pinched pipe
Insulate the header using
the insulation
material attached to the
branch pipe kit
as shown in the figure.
- Joints between branch and pipe should be sealed with the tape in-
cluded in each kit.
Insulator
Facing
- Any cap pipe should be insulated using the insulator provided with
upwards
each kit and then taped as described above.
Insulator for cap pipe
Cap pipe
Selection of Y Branch and Header
Y Branch
Models
Gas pipe
I.D12.7
I.D15.88
ARBLN
01621
I.D19.05
O.D15.88
70
I.D22.2
I.D19.05
1
I.D25.4
ARBLN
03321
I.D22.2
I.D28.58 O.D25.4
O.D19.0 5
3
70
I
D .
2
8
5 .
8
1
I.D31.8
ARBLN
07121
I.D28.58
I.D31.8
2
O.D22.2
120
I.D41.3
I.D34.9
I.D38.1
ARBLN
14521
I.D19.05 I.D15.88
3
O.D22.2
120
I.D12.7
3
O.D15.88
h For example. Indicated Ø9.52 is the outer diameter(O.D..) of field
jointed piping
Tape
Insulator of field pipe
Tape
Liquid pipe
I.D12.7
I.D15.88
I.D.6.35
I.D9.52
1
I.D15.88
74
I.D12.7
281
292
1
O.D9.52
I.D12.7
70
I.D15.88
I.D19.05
I.D12.7
2
I
D .
9
5 .
2
I.D19.05
83
I.D15.88
I.D12.7
390
3
I.D12.7
413
I.D22.2
O.D19.0 5
I.D25.4
1
2
80
11 0
I.D19.05
I
D .
2
2
2 .
I.D15.88
I.D12.7
I.D15.88
2
I.D15.88
96
I.D19.05
I.D12.7
I.D19.05
376
3
40 4
I.D34.9 O.D31. 8
I.D22.2
O.D19.0 5
I.D28.58
. O
1 D
2
7 .
I
D .
9
5 .
2
I.D6.35
1
3
3
90
120
11 0
I.D34.9
I.D38.1
I.D28.58
I.D15.88
I.D19.05
2
1
I.D28.58
125
I.D22.2
I.D34.9
I.D22.2
471
3
517
I.D41.3
I.D38.1
O.D38.1
O.D34.9
2
3
I.D41.3
I.D12.7
O.D15.88
I.D9.52
90
130
O.D28.58
I.D22.2
2
3
2
I.D19.05
11 0
[unit:mm]
I.D6.35
I.D9.52
I.D.6.35
74
I.D.9.52
281
292
I.D12.7
I.D9.52
I
D .
6
3 .
5
I.D12.7
74
I.D9.52
I.D6.35
321
332
I.D19.05
I.D15.88
I.D12.7
2
I.D12.7
83
I.D15.88 I.D19.05
371
3
394
O.D12. 7
I
D .
9
5 .
2
2
70
I.D19.05
I.D22.2
I.D15.88
2
I.D15.88
I.D19.05
I.D12.7
96
416
3
444
O.D19.0 5
I.D9.52
I.D22.2
O.D12. 7
I.D6.35
3
80
11 0
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