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15
ENGLISH
(Table 2) Refrigerant pipe diameter from outside unit to first branch. (A)
h
* : See Table 4
Upward
Outside unit
total capacity
Standard Pipe
Diameter
Increased Pipe Diameter
When equivalent pipe length is 90m
or more from ODU to farthest IDU
kW
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 12.70(1/2)
Ø 25.4(1)
10
Ø 9.52(3/8)
Ø 22.2(7/8)
Ø 12.70(1/2)
Ø 25.4(1)
12 ~ 14
Ø 12.7(1/2)
Ø 25.4(1)
Ø 15.88(5/8)
Ø 28.58(1-1/8)
16
Ø 12.7(1/2)
Ø 28.58(1-1/8)
Ø 15.88(5/8)
Ø 31.8(1-1/4)
18 ~ 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)
36 ~ 60
Ø 19.05(3/4)
Ø 41.3(1-5/8)
Ø 22.2(7/8)
Ø 44.5(1-3/4)
62 ~ 64
Ø 22.2(7/8)
Ø 44.5(1-3/4)
Ø 25.4(1)
Ø 53.98(2-1/8)
66 ~ 80
Ø 22.2(7/8)
Ø 53.98(2-1/8)
Ø 25.4(1)
Ø 63.5(2-1/2)
Classifica-
tion
Section
Type
Y branch
Y/header branch
Header
branch
Max pipe
length
Outside Unit
÷
Indoor Unit
Maximum
pipe
length(L)
A+B+C+D+e
≤
150 m
(Conditionally 200 m)*
A+B+b
≤
150 m
A+C+e
≤
150 m
(Conditionally
200m)*
A+f
≤
150 m
Equivalent
pipe length
175 m
(Conditionally
225 m)*
175 m
(Conditionally
225 m)*
175 m
Total pipe
length
300 m
(Conditionally
500 m)*
300 m
(Conditionally
500 m)*
300 m
(Condition-
ally 500 m)*
Max
difference
in height
Outside Unit
÷
Indoor Unit
Difference in
height(H)
50 m
50 m
50 m
Indoor Unit
÷
Indoor Unit
Difference in
height(h)
40 m
40 m
40 m
Longest pipe
length after
1st branch
Pipe
length(l)
40 m
(Conditionally
90m)*
40 m
(Conditionally
90m)*
40 m
( Table 1 ) Limit Pipe length
WARNING
Increased Pipe Diameter(table 2)
- When pipe length is Over 40m from 1st branch to longest IDU.
!
Header method
Ⓐ
: Outside Unit
Ⓑ
: Header
Ⓒ
: Indoor Units
Ⓓ
: Sealed piping
Ⓔ
: Connection branch pipe
between Outside units :
ARCNN41
Ⓕ
: Connection branch pipe
between Outside units :
ARCNN31
Ⓖ
: Connection branch pipe
between Outside units :
ARCNN21
Slave3
Slave2
Slave1
Master
l
40m
H 50m
L 150m
h 40m
10m or
less
ODU Capacity
Master ≥ Slave 1 ≥Slave 2 ≥Slave 3
C
C
C
C
C
C
Pipe Connection Method between outside unit
/indoor unit
h
See Table 2
A : Refrigerant pipe diameter from outside unit to first branch
E : Refrigerant pipe diameter for outside unit capacity
(Slave 1+ Slave 2+ Slave 3)
F : Refrigerant pipe diameter for outside unit capacity
(Slave 2+ Slave 3)
G : Refrigerant pipe diameter for outside unit capacity(Slave 3)
L1
L2
L3
L4
H1
E
G
F
Slave3
Slave2
Slave1
Master
l
40m
h 40m
Indoor
Unit
1st branch
Refrigerant pipe diameter from outside unit to first branch
Level Difference (H1)
(Outside unit
÷
Outside unit)
2m
Max length from first branch to
each outside unit (L1,L2,L3,L4)
Less than 10m
(equivalent length of piping 13m)
(Table 3) Refrigerant pipe diameter from first branch to last branch (B,C,D)
Downward indoor unit
total capacity [kW(Btu/h)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
≤
5.6(19,100)
Ø6.35(1/4)
Ø12.7(1/2)
< 16.0 (54,600)
Ø9.52(3/8)
Ø15.88(5/8)
≤
22.4 (76,400)
Ø9.52(3/8)
Ø19.05(3/4)
< 33.6 (114,700)
Ø9.52(3/8)
Ø22.2(7/8)
< 50.4 (172,000)
Ø12.7(1/2)
Ø28.58(1-1/8)
< 67.2 (229,400)
Ø15.88(5/8)
Ø28.58(1-1/8)
< 72.8(248,500)
Ø15.88(5/8)
Ø34.9(1-3/8)
< 100.8(344,000)
Ø19.05(3/4)
Ø34.9(1-3/8)
< 173.6(592,500)
Ø19.05(3/4)
Ø41.3(1-5/8)
< 184.8(630,700)
Ø22.2(7/8)
Ø44.5(1-3/4)
≤
224.0(764,400)
Ø22.2(7/8)
Ø53.98(2-1/8)
(Table 4) Conditional Application
• To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.
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 di-
ameter is the same as the
main pipe.
40 m < B+C+D+e
≤
90 m
’
Change B, C, and D pipe
diameter.
2
During the calculation of
the total refrigerant pipe
length, the above pipe
length shall be calcu-
lated as twice.
A+Bx2+Cx2+
Dx2+a+b+c+d+e
≤
500 m
3
The length from each in-
door unit to the nearest
branch pipe
≤
40 m
a,b,c,d,e
≤
40 m
4
Length from outside unit
to the farthest indoor
unit] – [Length from out-
side unit to the nearest
indoor unit]
≤
40 m
(A+B+C+D+e)-
(A+a)
≤
40 m
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
L
H 50 m
40 m
IDU
Direction
Summary of Contents for Multi V ARWN Series
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