Installation guide
21
ENGLISH
Y branch
A
B
Facing
upwards
Facing
downwards
Within ±3° Within ±3°
Viewed from point A
in direction of arrow
Horizontal
plane
Within +/- 10°
A
Insulator
(included with kit)
Liquid and gas
pipe joints
Insulator for
field piping
Tape
(field supply)
Ⓐ To Branch Piping or Indoor Unit
Ⓑ To Outdoor Unit
• Ensure that the branch pipes are attached horizontally or vertically
(see the diagram below.)
• There is no limitation on the joint mounting configuration.
• If the diameter of the refrigerant piping selected by the procedures
described is different from the size of the joint, the connecting
section should be cut with a pipe cutter.
• Branch pipe should be insulated with the insulator in each kit.
• 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.
Pinched pipe
B
Header
A
B
C
Ⓐ To Outdoor Unit
Ⓑ To Indoor Unit
• The indoor unit having larger
capacity must be installed closer
to Ⓐ than smaller one.
• If the diameter of the refrigerant
piping selected by the
procedures described is
different from the size of the
joint, the connecting 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,
install a cap to the unconnected
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.
• Joints between branch and pipe should be sealed with the tape
included in each kit.
• Any cap pipe should be insulated using the insulator provided with
each kit and then taped as described above.
Insulate the header using
the insulation
material attached to the
branch pipe kit
as shown in the figure.
Insulator
Insulator of field pipe
Tape
Tape
Cap pipe
Insulator for cap pipe
Y branch pipe
Models Gas pipe Liquid pipe
ARBLN01621
I.D 19.05(3/4)
O.D 15.88(5/8)
I.D 12.7(1/2)
I.D 15.88(5/8)
I.D 15.88(5/8)
I.D 15.88(5/8)
I.D 12.7(1/2)
I.D 12.7(1/2)
292(11-1/2)
281(11-1/16)
74
(2-29/32)
70(2-3/4)
1
1
I.D 12.7(1/2)
292(11-1/2)
281(11-1/16)
74
(2-29/32)
70(2-3/4)
I.D 6.35(1/4)
I.D 6.35(1/4)
I.D 6.35(1/4)
1
1
I.D 9.52(3/8)
I.D 9.52(3/8)
I.D 9.52(3/8)
O.D 9.52(3/8)
ARBLN03321
413(16-1/4)
390(15-11/32)
I.D 19.05(3/4)
I.D 19.05(3/4)
I.D 19.05(3/4)
I.D 12.7(1/2)
I.D 12.7
(1/2)
70(2-3/4)
I.D 15.88(5/8)
I.D 15.88(5/8)
I.D 25.4(1)
I.D 25.4(1)
O.D 25.4(1)
80(3-5/32)
110(4-11/32)
83
(3-9/32)
1
2
3
3
O.D 19.05(3/4)
O.D 19.05(3/4)
1 2
I.D 22.2(7/8)
I.D 22.2(7/8)
I.D 22.2(7/8)
I.D 28.58(1-1/8)
I.D 12.7(1/2)
I.D 12.7(1/2)
I.D 12.7(1/2)
74
(2-29/32)
332(13-1/16)
321(12-5/8)
I.D 6.35(1/4)
I.D 6.35(1/4)
I.D 9.52(3/8)
I.D 9.52(3/8)
I.D 9.52(3/8)
ARBLN07121
I.D 12.7
(1/2)
376(14-13/16)
404(15-29/32)
120(4-23/32) 120(4-23/32)
90(3-17/32)
I.D 15.88(5/8)
I.D 15.88(5/8)
2
3
1
2
1 3
I.D 19.05(3/4)
I.D 19.05(3/4)
O.D 19.05(3/4)
96
(3-25/32)
I.D 22.2(7/8)
I.D 22.2(7/8)
O.D 22.2(7/8)
I.D 34.9(1-3/8)
I.D 28.58(1-1/8)
I.D 28.58(1-1/8)
I.D 28.58(1-1/8)
O.D 31.8(1-1/4)
I.D 31.8(1-1/4)
I.D 31.8(1-1/4)
I.D 15.88(5/8)
I.D 15.88(5/8)
I.D 15.88(5/8)
I.D 12.7(1/2)
I.D 12.7(1/2)
I.D 12.7(1/2)
O.D 12.7(1/2)
O.D 12.7(1/2)
70(2-3/4)
110(4-11/32)
371(14-19/32)
394(15-1/2)
83
(3-9/32)
2
3
3
I.D 19.05(3/4)
I.D 19.05(3/4)
I.D 19.05(3/4)
2
I.D 6.35(1/4)
I.D 9.52(3/8)
I.D 9.52(3/8)
ARBLN14521
I.D 12.7(1/2)
70(2-3/4)
471(18-17/32)
517(20-11/32)
125
(4-29/32)
130(5-1/8)
I.D 15.88(5/8)
I.D 41.3(1-5/8)
I.D 41.3
(1-5/8)
I.D 41.3(1-5/8)
I.D 38.1(1-1/2)
I.D 38.1(1-1/2)
I.D 38.1(1-1/2)
O.D 38.1(1-1/2)
O.D 15.88(5/8)
2
3
3
2
2
3
3
120(4-23/32)
120(4-23/32)
90(3-17/32)
I.D 19.05(3/4)
I.D 19.05(3/4)
I.D 22.2
(7/8)
I.D 22.2(7/8)
O.D 22.2(7/8)
I.D 34.9(1-3/8)
I.D 34.9(1-3/8)
I.D 34.9(1-3/8)
O.D 34.9(1-3/8)
I.D 28.58(1-1/8)
O.D 28.58(1-1/8)
I.D 28.58(1-1/8)
I.D 12.7(1/2)
O.D 12.7(1/2)
I.D 12.7
(1/2)
110(4-11/32)110(4-11/32)
41616-3/8)
444(17-15/32)
O.D 15.88(5/8)
I.D 15.88(5/8)
I.D 19.05(3/4)
I.D 15.88(5/8)
I.D 15.88(5/8)
I.D 19.05(3/4)
I.D 19.05(3/4)
O.D 19.05(3/4)
80(3-5/32)
2
3
1
2 3 3
96
(3-25/32)
I.D 22.2(7/8)
I.D 22.2(7/8)
I.D 22.2(7/8)
I.D 6.35(1/4)
I.D 9.52(3/8)
I.D 9.52(3/8)
ARBLN23220
O.D
28.58(1-1/8)
I.D
22.2(7/8)
115(4-17/32)
X2
100(4-11/32)
O.D 15.88(5/8)
I.D 12.7(1/2)
70(2-3/4)
O.D
22.2(7/8)
I.D
15.88(5/8)
I.D
19.05(3/4)
120(4-23/32)
O.D 38.1(1-1/2)
I.D 34.9(1-3/8)
I.D 28.58(1-1/8)
O.D 44.48(1-3/4)
X2
175(6-7/8)
I.D 31.8(1-1/4)
I.D 53.98(2-1/4) I.D
25.4(1)
I.D 44.48(1-3/4)
I.D 44.48(1-3/4)
I.D 38.1(1-1/2)I.D 41.3(1-5/8)
I.D 44.48(1-3/4)
I.D 38.1(1-1/2)
I.D 41.3(1-5/8)
I.D 53.98(2-1/4)
420(16-17/32)
490(19-9/32)
134
1
2
3
32
3 3
3
3
2
O.D
19.05(3/4)
O.12.7(1/2)
I.D 15.88(5/8)
O.12.7(1/2) I.D 6.35(1/4)
I.D 9.52(3/8)
X2
110(4-11/32) 110(4-11/32)
I.D 25.4(1) I.D
22.2(7/8)
I.D
19.05(3/4)
I.D
19.05(3/4)
I.D
22.2(7/8)
I.D
25.4(1)
I.D
25.4(1)
I.D
22.2(7/8)
346(13-5/8)
379(14-29/32)
96(3-25/32)
2
3 32
3
[Unit:mm(inch)]
Branch pipe Fitting