21
ENGLISH
h * : See Table 4
Classification
Section Type Y branch
Y/header branch
Header
branch
Max pipe
length
Outdoor Unit
÷
Indoor Unit
Maximum
pipe
length(L)
A+B+C+D+e
≤
150 m(492 ft)
(Conditionally 200 m
(656 ft))*
A+B+b
≤
150 m(492 ft)
A+C+e
≤
150 m(492 ft)
(Conditionally 200 m
(656 ft))*
A+f
≤
150 m(492 ft)
Equivalent
pipe length
175 m(574 ft)
(Conditionally
225 m(738 ft))*
175 m(574 ft)
(Conditionally
225 m(738 ft))*
175 m (574 ft)
Total pipe
length
300 m(984 ft)
(Conditionally
500 m(1 640 ft))*
300 m(984 ft)
(Conditionally
500 m(1 640 ft))*
300 m(984 ft)
(Conditionally
500 m(1 640 ft))*
Max
difference
in height
Outdoor Unit
÷ Indoor Unit
Difference in
height(H)
50 m(164 ft) 50 m(164 ft) 50 m(164 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)
(Conditionally
90 m(295 ft))*
40 m(131 ft)
(Conditionally
90 m(295 ft))*
40 m(131 ft)
(Table 1) Limit Pipe length
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
Ⓓ : Downward Indoor Unit
Ⓔ : Connection branch
pipe between Outdoor
units : ARCNN31
Ⓕ : Connection branch
pipe between Outdoor
units : ARCNN21
Y branch method
Combination of Y branch/
header method
Ⓐ : Outdoor Unit
Ⓑ : 1st branch(Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Connection branch pipe
between Outdoor
units : ARCNN31
Ⓕ : Connection branch pipe
between Outdoor
units : ARCNN21
Ⓖ : Header
Ⓗ : Sealed piping
Slave2
Slave1
Master
Indoor
Unit
l 40m(131ft) (90m(295ft) : Conditional application)*
H 50m(164ft)
L150m(492ft) (200m(656ft) : Conditional application)*
h 40m(131ft)
ODU Capacity
Master ≥ Slave 1 ≥Slave 2
C
C
CC
10 m
(33 ft)
or less
l 40m(131ft) (90m(295ft) : Conditional application)*
L150m(492ft) (200m(656ft) : Conditional application)*
h 40m(131ft)
ODU Capacity
Master ≥ Slave 1 ≥Slave 2
H
Slave2
Slave1
Master
H 50m(164ft)
10 m
(33 ft)
or less
Series Outdoor Units (2 Units ~ 3 Units)
h * : See the Table 4
h * : See the Table 4
Header method
Ⓐ : Outdoor Unit
Ⓑ : Header
Ⓒ : Indoor Units
Ⓓ : Sealed piping
Ⓔ : Connection branch pipe
between Outdoor
units : ARCNN31
Ⓕ : Connection branch pipe
between Outdoor
units : ARCNN21
Slave2
Slave1
Master
l 40 m(131 ft)
H 50 m(164 ft)
L150 m(492 ft)
h 40 m(131 ft)
10 m
(33 ft)
or less
ODU Capacity
Master ≥ Slave 1 ≥Slave 2
C
C
C C C
C
Pipe Connection Method between outdoor
unit /indoor unit
A : Refrigerant pipe diameter from outdoor unit to first branch
E : Refrigerant pipe diameter for outdoor unit capacity
(Slave 1+ Slave 2)
F : Refrigerant pipe diameter for outdoor unit capacity (Slave 2)
h See Table 2
L1
L2
L3
H1
E F
Slave2
Slave1
Master
l 40 m(131 ft)
h 40 m(131 ft)
Indoor
Unit
1st branch
Refrigerant pipe diameter from outdoor unit to first branch
Level Difference (H1)
(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(35 ft)
[equivalent length of piping 13 m(43 ft)]
WARNING
!
Increased Pipe Diameter (table 2)
- When pipe length is Over 40 m(131 ft) from 1st branch to longest
IDU.
(Table 2) Refrigerant pipe diameter from outdoor unit to first branch. (A)
ODU
capacity
(HP(ton))
Pipe diameter when pipe
Length is < 90 m (295 ft)
(Standard)
Pipe diameter when pipe
length (ODU ÷ IDU)
is ≥ 90 m (295 ft)
Liquid pipe
[mm(inch)]
Vapor pipe
[mm(inch)]
Liquid pipe
[mm(inch)]
Vapor pipe
[mm(inch)]
8(6) Ø 9.52(3/8) Ø 19.05(3/4) Ø 12.7(1/2) Ø 22.2(7/8)
10(8) Ø 9.52(3/8) Ø 22.2(7/8) Ø 12.7(1/2) Ø 28.58(1-1/8)
12(10)~14(12)
Ø 12.7(1/2) Ø 28.58(1-1/8) Ø 15.88(5/8) Not increased
20(16)
Ø 15.88(5/8) Ø 28.58(1-1/8) Ø 19.05(3/4) Ø 31.8(1-1/4)
24(20) Ø 15.88(5/8) Ø 34.9(1-3/8) Ø 19.05(3/4) Not increased
28~34(24~28)
Ø 19.05(3/4) Ø 34.9(1-3/8) Ø 22.2(7/8) Ø 38.1(1-1/2)
43~54(36~46)
Ø 19.05(3/4) Ø 41.3(1-5/8) Ø 22.2(7/8) Not increased
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