
8. Refrigerant Piping System
23
MULTI V Water IV
Heat Pump
Installation of Outside Units
Refrigerant pipe diameter from outside unit to first branch. (A, E, F, G)
* If the step up size is not available, you can not select the next higher size available.
WARNING
To install maximum pipe length after the 1st branch exceeding 40 m and 90 m or less, the following conditions
must be satisfied.
(Table 1) Cautions during the installation of Maximum pipe length 90m after the 1st branch
̰
Cautions for Y branch pipe
WARNING
If the pipe diameter(B, C) connected after the 1st branch is larger than the main pipe diameter(A), install the pipe
diameter(B, C) connected after the 1st branch to be the same as the main pipe diameter(A).
Example) If indoor units are connected 120 % to 29 kW
• Outside unit main pipe diameter(A): (Gas pipe) (Fluid pipe)
• Pipe diameter(B, C) after the 1st branch according to 120% indoor unit combination(34.8kW):
(Gas pipe) (Fluid pipe)
Therefore, select the pipe diameter(B, C) after the 1st branch to be main pipe diameter(A) (Gas pipe) (Fluid pipe)
Upward outside
unit total capacity
Standard pipe diameter
Increased pipe diameter
When equivalent pipe length from the
outside unit to farthest indoor unit is
90m and over
HP
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
8
Ø 9.52(3/8)
Ø 22.2(7/8)
Ø 12.7(1/2)
not increased
10
Ø 9.52(3/8)
Ø 22.2(7/8)
Ø 12.7(1/2)
Ø 25.4(1)
14
Ø 12.7(1/2)
Ø 25.4(1)
Ø 15.88(5/8)
Ø 28.58(1-1/8)
16 ~ 20
Ø 12.7(1/2)
Ø 28.58(1-1/8)
Ø 15.88(5/8)
Ø 31.8(1-1/4)
22 ~34
Ø 19.05(3/4)
Ø 34.9(1-3/8)
Ø 22.2(7/8)
Ø 38.1(1-1/2)
40 ~ 60
Ø 19.05(3/4)
Ø 41.3(1-5/8)
Ø 22.2(7/8)
not increased
62 ~ 64
Ø 22.2(7/8)
Ø 44.5(1-3/4)
Ø 25.4(1)
Ø 53.98(2-1/8)
68 ~ 80
Ø 22.2(7/8)
Ø 53.98(2-1/8)
Ø 25.4(1)
not increased
Required
Example
1
Select the diameter of the pipe between the 1st
branch and the last branch to be 1 level larger.
Provided that, it is not necessary if the pipe
diameter is the same as the main pipe.
40 m < B+C+D+e
˺
90 m
˧
Change B, C, and D pipe
diameter.
Ø6.35
˧
Ø9.52, Ø9.52
˧
Ø12.7,
Ø12.7
˧
Ø15.88, Ø15.88
˧
Ø19.05,
Ø19.05
˧
Ø22.2, Ø22.2
˧
Ø25.4,
Ø25.4
˧
Ø28.58, Ø28.58
˧
Ø31.8,
Ø31.8
˧
Ø34.9, Ø34.9
˧
Ø38.1
2
During the calculation of the total refrigerant pipe
length, the above pipe length shall be calculated
as twice.
A+Bx2+Cx2+
Dx2+a+b+c+d+e
˺
500 m
3
The length from each indoor unit to the nearest
branch pipe
˺
40 m
a,b,c,d,e
˺
40 m
4
Length from outside unit to the far- thest indoor
unit] – [Length from out- side unit to the nearest
indoor unit]
˺
40 m
(A+B+C+D+e)-(A+a)
˺
40 m
L
H
50 m
IDU
Direction
h 40m
a
d
d
d
d
d
d
d
b
Содержание MULTI V WATER IV ARWN080LAS4
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Страница 27: ...17 MULTI V Water IV Heat Pump Outside Units 4 Wiring Diagrams ARWN080LAS4 ARWN100LAS4 ARWN140LAS4 ...
Страница 28: ...MULTI V Water IV Heat Pump 4 Wiring Diagrams 18 Outside Units ARWN200LAS4 ...
Страница 392: ...Special Guide MULTI V Water IV Heat Pump 1 Cautions for Refrigerant Leaks ...