LG ARUB230BT2 Installation Manual page 33

➲ Refrigerant pipe diameter between branches and HR units (B,C,D)
Downward indoor unit total capacity
[kW(Btu/h)]
≤ 5.6 (19,100)
< 16.0 (54,600)
< 22.4 (76,400)
< 33 (112,600)
< 47 (160,400)
< 71 (242,300)
< 104 (354,900)
104 (354,900) ≤
➲ Total pipe length (A+B+C1+C2+C3+D+a+b+c+d+e+f+g+i+j+k) ≤ 1000m(3280ft)
Outdoor unit ~ the farthest indoor unit
~
E1 D10
A+B+C3+D+K ≤ 150m(492ft)(200m(656ft))(*))
HR Unit ~ neighboring HR Unit
~
C3 C4
D≤ 10m(33ft)
First indoor branch ~ the farthest indoor unit
~
B1 D10
B+C3+D+k ≤ 90m(295ft)(*)
First outdoor branch ~ the farthest outdoor unit
~
E1 A3
E+F3 ≤ 10m(33ft)
Difference in height (outdoor unit ↔ indoor unit)
H
H ≤ 100m(328ft)
Difference in height (indoor ~ indoor unit)
h
H ≤ 15m(49ft)
Piping length from each indoor unit to the closest HR Unit
g, I, j, k
a,b,c,d,e,f,g, i, j, k ≤ 40m(131ft)
Prohibited pattern
1
48k
• Capacity sum of indoor units is over 160kBtu/hr.
Pattern
A
1
Indoor unit
Low pressure Gas pipe
Outdoor
High pressure Gas pipe
Unit
Liquid pipe
[mm(inch)]
Ø6.35(1/4)
Ø9.52(3/8)
Ø9.52(3/8)
Ø9.52(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø19.05(3/4)
Equivalent pipe length
A+B+C3+D+K ≤ 175m(574ft)(225m(738ft))(*))
HR1
2 3 4
48k 48k 48k
HR1 HR2
1 2 3 4
36k 36k 36k 36k
Y Branch pipe
A
HR
Unit
Liquid pipe
Refrigerant piping installation
Gas pipe [mm(inch)]
Low pressure
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø22.2(7/8)
Ø28.58(1-1/8)
Ø28.58(1-1/8)
Ø34.9(1-3/8)
Ø41.3(1-5/8)
Prohibited pattern
15m(49ft)
HR1
1 2 3
12k 24k 24k
• Distance between neighboring HR unit is over 10m,
and Capacity sum of indoor units is over 160kBtu/hr.
Pattern
A
HR1
1 2 3
12k 24k 24k
Gas pipe
Indoor
Unit
Liquid pipe
High pressure
Ø9.52(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø22.2(7/8)
Ø28.58(1-1/8)
Ø28.58(1-1/8)
Ø28.58(1 -1/8)
CAUTION
• Assume equivalent pipe
length of Y branch to be
0.5m(1.6ft), calculation
purpose.
CAUTION:
• Should not be exceed
10m(33ft) between
neighboring HR unit.
• Serial connection of
HR units : Capacity
sum of indoor units ≤
160kBtu/hr.
HR2
4 5 6 7 8
12k 48k 48k 48k 12k
HR2
4 5 6 7 8
12k 48k 48k 48k 12k
Installation Manual 33