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G Cautions for Refrigerant Pipe Ends
When installing pipe through
the wall, secure a cap at the
end of the pipe.
Incorrect
Correct
Hole
Hole
Attach a cap
or vinyl tape.
Correct
Incorrect
Rain water can
enter.
Attach a cap
or vinyl bag with
rubber band.
Table 5.1 Piping Size of Outdoor Unit
Outdoor Unit Models
Gas Piping
φ31.75 (1-1/4)
RAS-34FSN
φ38.1 (1-1/2)
RAS-36FSN
φ38.1 (1-1/2)
RAS-38FSN
φ38.1 (1-1/2)
RAS-40FSN
φ38.1 (1-1/2)
RAS-42FSN
Table 5.2 Piping Size of Indoor Unit
Indoor Unit Models
RPI-0.8FSN, 1.0FSN, 1.5FSN
RCI-1.0FSN, 1.5FSN
RCD-1.0FSN, 1.5FSN
RPK-0.8FSNSM1, 1.0FSNSM1, 1.5FSNSM1
RPF-1.0FSN(E), 1.5FSN(E)
RPFI-1.0FSN(E), 1.5FSN(E)
RPI-2.0FSN, RCI-2.0FSN, RCD-2.0FSN,
RPK-2.0FSNSM, RPC-2.0FSN
RPI-2.5FSN, 3.0FSN, 4.0FSN, 5.0FSN
RCI-2.5FSN, 3.0FSN, 4.0FSN, 5.0FSN
RCD-2.5FSN, 3.0FSN, 4.0FSN, 5.0FSN
RPK-2.5FSNSM, 3.0FSNSM,
3.5FSNSM, 4.0FSNSM
RPC-2.5FSN, 3.0FSN, 4.0FSN, 5.0FSN
Do not place the pipe
directly on the ground.
Correct
Incorrect
Attach a cap
or vinyl tape.
Unit: mm (in.)
Liquid Piping
φ19.05 (3/4)
φ19.05 (3/4)
φ19.05 (3/4)
φ19.05 (3/4)
φ19.05 (3/4)
Unit: mm (in.)
Gas
Liquid
Piping
Piping
φ12.7
φ6.35
(1/2)
(1/4)
φ15.88
φ6.35
(5/8)
(1/4)
φ15.88
φ9.53
(5/8)
(3/8)
• Flaring Dimension
Perform the flaring work as shown below.
o
+ 2
o
90
φA
0.4 ~ 0.8R
φd
(/) It is impossible to perform the flaring
work with 1/2H material. In this case,
use an accessory pipe (with a flare).
• Piping Thickness and Material
Use the pipe as below.
R410A
Diameter
Thickness
Material
φ6.35
0.8
O material
φ9.53
0.8
O material
φ12.7
0.8
O material
φ15.88
1.0
O material
φ19.05
1.0
1/2H material
φ22.2
1.0
1/2H material
φ25.4
1.0
1/2H material
φ28.6
1.0
1/2H material
φ31.75
1.1
1/2H material
φ38.1
1.35
1/2H material
• Joint Selection
If you use 1/2H material, you can not perform
the flaring work. In this case, use a joint
selected from the chart below.
<Minimum Thickness of Joint (mm)>
Diameter
R410A
φ6.35
0.5
φ9.53
0.6
φ12.7
0.7
φ15.88
0.8
φ19.05
0.8
φ22.2
0.9
φ25.4
0.95
φ28.6
1.0
φ31.75
1.1
φ38.1
1.35
<Flare Nut Dimension B (mm)>
Diameter
R410A
R407C
φ6.35
17
φ9.53
22
φ12.7
26
φ15.88
29
φ19.05
36
(mm)
+0
A
Diameter
-0.4
φd
R410A
R407C
6.35
9.1
9.0
9.53
13.2
13.0
12.7
16.6
16.2
15.88
19.7
19.4
19.05
23.3
(/)
(mm)
R407C
Thickness
Material
0.8
O material
0.8
O material
0.8
O material
1.0
O material
1.0
O material
1.15
O material
1.0
1/2H material
1.0
1/2H material
1.1
1/2H material
1.15
1/2H material
R407C
0.5
0.6
0.7
0.8
0.8
0.9
0.95
1.0
1.05
1.25
B
17
22
24
27
36
Flare Nut
7
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