14
ENGLISH
Header Method
Ⓐ
: Outdoor Unit
Ⓑ
: Header branch
Ⓒ
: Indoor Units
Ⓓ
: Sealed piping
Ⓔ
: Connection branch pipe
between Outdoor
units : ARCNN41
Ⓕ
: Connection branch pipe
between Outdoor
units : ARCNN31
Ⓖ
: Connection branch pipe
between Outdoor
units : ARCNN21
Slave3
Slave2
Slave1
Master
l
40 m [131 ft]
H 110 m [36
1
ft]
L 200 m [656 ft]
h 40 m (131 ft)
10m or
less
ODU Capacity
Master ≥ Slave 1 ≥Slave 2 ≥Slave 3
G
F
E
B
D
C
C
C
C
C
C
Pipe Connection Method between outdoor
unit/indoor unit
h
See Table 2
A : Refrigerant pipe diameter from outdoor unit to first branch
E : Refrigerant pipe diameter for outdoor unit capacity
(Slave 1+ Slave 2+ Slave 3)
F : Refrigerant pipe diameter for outdoor unit capacity
(Slave 2+ Slave 3)
G : Refrigerant pipe diameter for outdoor unit capacity(Slave 3)
L1
L2
L3
H1
E
G
F
Slave3
Slave2
Slave1
Master
l
40m (131ft)
h 40 m (131 ft)
Indoor
Unit
1st branch
Refrigerant pipe diameter from outdoor unit to first branch
Level Difference
(Outdoor unit
↔
Outdoor unit)
5 m [16.4 ft]
Max length from first branch to
each outdoor unit (L1, L2, L3)
Less than 10 m [32.8 ft]
(equivalent length of piping 13 m
[42.7 ft])
h
* : See Table 4
WARNING
Increased Pipe Diameter(table 2)
- When pipe length is 90m [295 ft] or more from ODU to 1st
branch
- When level difference is 50 m [164 ft] or more
!
WARNING
• Branch pipe can not be used after header.
• It is recommended that difference in length of the pipes con-
nected to the indoor units (a~f) is minimized. Performance dif-
ference between indoor units may occur.
!
Y branch
Method
Combination of Y
branch/header
Method
Header
Method
Max pipe
length
Outdoor Unit
↔
Indoor Unit
Longest
pipe
length(L)
A+B+C+D+e
≤
150 m
[492 ft]
(200 m [656 ft] : Condi-
tional application)*
A+B+b
≤
150 m [492 ft]
A+C+e
≤
150 m [492 ft]
(200 m [656 ft] : Condi-
tional application)*
A+f
≤
200 m
[656 ft]
Equivalent
pipe length
175 m [574 ft]
(225 m [738 ft] : Condi-
tional application)*
175 m [574 ft]
(225 m [738 ft] : Condi-
tional application)*
225 m
[738 ft]
Total pipe
length
1000 m [3281 ft]
1000 m [3281 ft]
1000 m
[3281 ft]
Max
difference
in height
Outdoor Unit
↔
Indoor Unit
Difference in
height(H)
110 m [361 ft]
110 m [361 ft]
110 m [361 ft]
Indoor Unit
↔
Indoor Unit
Difference in
height(h)
40 m [131 ft]
40 m [131 ft]
40 m [131 ft]
Longest pipe
length after
1st branch
Pipe
length(
ℓ
)
40 m [131 ft]
(90 m [295 ft] : Condi-
tional application)*
40 m [131 ft]
(90 m [295 ft] : Condi-
tional application)*
40 m [131 ft]
(Table 1) Limit Pipe length
(Table 2) Refrigerant pipe diameter from outdoor unit to first branch. (A)
ODU
capacity
(hp)
Pipe diameter when pipe
length is < 90m (295ft)
(Standard)
Pipe diameter when pipe
length is
≥
90m (295ft)
Pipe diameter when height differ-
ential (ODU
↔
IDU) is > 50m (164ft)
Liquid Pipe
mm (inch)
Gas Pipe
mm (inch)
Liquid Pipe
mm (inch)
Gas Pipe
mm (inch)
Liquid Pipe
mm (inch)
Gas Pipe
mm (inch)
8
Ø9.52 (3/8)
Ø19.05 (3/4)
Ø12.7 (1/2)
Ø22.2 (7/8)
Ø12.7 (1/2) Not increased
10
Ø9.52 (3/8)
Ø22.2 (7/8)
Ø12.7 (1/2) Ø28.58 (1-1/8) Ø12.7 (1/2) Not increased
12~16
Ø12.7 (1/2) Ø28.58 (1-1/8) Ø15.88 (5/8) Ø34.9 (1-3/8) Ø15.88 (5/8) Not increased
18~22
Ø15.88 (5/8) Ø28.58 (1-1/8) Ø19.05 (3/4) Ø34.9 (1-3/8) Ø19.05 (3/4) Not increased
24
Ø15.88 (5/8) Ø34.9 (1-3/8) Ø19.05 (3/4) Ø41.3 (1-5/8) Ø19.05 (3/4) Not increased
26~34
Ø19.05 (3/4) Ø34.9 (1-3/8) Ø22.2 (7/8) Ø41.3 (1-5/8) Ø22.2 (7/8) Not increased
36~60
Ø19.05 (3/4) Ø41.3 (1-5/8) Ø22.2 (7/8) Ø44.5 (1-3/4) Ø22.2 (7/8) Not increased
62~64
Ø22.2 (7/8) Ø44.5 (1-3/4)
Ø25.4 (1)
Ø53.98 (2-1/8)
Ø25.4 (1)
Not increased
66~96
Ø22.2 (7/8) Ø53.98 (2-1/8)
Ø25.4 (1)
Ø53.98 (2-1/8)
Ø25.4 (1)
Not increased
(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
Condition
Example
1
Diameter of pipes be-
tween first branch and the
last branch should be in-
creased by one step, ex-
cept pipe diameter B,C,D
is same as Diameter A
40 m [131 ft] <
B+C+D+e
90 m [295 ft]
’
B, C, D
Change a diameter
2
While calculating whole re-
frigerant pipe length, pipe
B,C,D length should be cal-
culated twice.
A+Bx2+Cx2+Dx2
+a+b+c+d+e
≤
1 000 m [3 281 ft]
3
Length of pipe from each
indoor unit to the closest
branch
a,b,c,d,e
≤
40 m
[131 ft]
4
Length of pipe from out-
door unit to the farthest
indoor unit 5
(A+B+C+D+e)] - [Length
of pipe outdoor unit to the
closest indoor unit 1
(A+a)]
≤
40 m [131 ft]
(A+B+C+D+e)-
(A+a)
≤
40 m
[131 ft]
• To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.
Ø6.35(1/4)
’
Ø9.52(3/8), Ø9.52(3/8)
’
Ø12.7(1/2), Ø12.7(1/2)
’
Ø15.88(5/8),
Ø15.88(5/8)
’
Ø19.05(3/4), Ø19.05(3/4)
’
Ø22.2(7/8), Ø22.2(7/8)
’
Ø25.4(1),
Ø25.4(1)
’
Ø28.58(1-1/8), Ø28.58(1-1/8)
’
Ø31.8(1-1/4), Ø31.8(1-1/4)
’
Ø34.9(1-3/8),
Ø34.9(1-3/8)
’
Ø38.1(1-1/2)
l
h 40 m [131 ft]
H 110 m [36
1
ft]
L
Indoor
Unit
1,MFL67221438,영영 2018. 10. 4. 영영 11:29 Page 14
