LG Multi V ARUB Series - Page 35

Installation Manual 35
ENGLISH
Refrigerant piping installation
Outdoor unit ~ the farthest indoor unit
A+B+C3+D+k ≤ 150m (equivalent pipe length ≤ 175m)
HR unit ~ neighboring HR unit
D ≤ 10 m
The 1st indoor branch ~ the farthest indoor unit
B+C3+D+k ≤ 40m
The 1st outdoor branch ~ the farthest outdoor unit
E+F3 ≤ 10m
Difference in height (outdoor unit ↔ indoor unit)
H ≤ 50m (40m:if outdoor unit is lower than indoor units)
Difference in height (indoor unit ↔ indoor unit)
h ≤ 15m
E1 ~ D10
➲ Refrigerant pipe diameter between branches and HR units (B,C,D)
➲ Total pipe length ≤ 300m
Downward indoor unit total capacity
[kW(Btu/h)]
< 5.6 (19,100) Ø6.35(1/4) Ø12.7(1/2) Ø9.52(3/8)
< 16.0 (54,600) Ø9.52(3/8) Ø15.88(5/8) Ø12.7(1/2)
< 22.4 (76,400) Ø9.52(3/8) Ø19.05(3/4) Ø15.88(5/8)
< 33 (112,600) Ø9.52(3/8) Ø22.2(7/8) Ø19.05(3/4)
< 47 (160,400) Ø12.7(1/2) Ø28.58(1
1
/8) Ø22.2(7/8)
< 71 (242,300) Ø15.88(5/8) Ø28.58(1
1
/8) Ø28.58(1
1
/8)
< 104 (354,900) Ø19.05(3/4) Ø34.9(1
3
/8) Ø28.58(1
1
/8)
104 (354,900) ≤ Ø19.05(3/4) Ø41.3(1
5
/8) Ø28.58(1
1
/8)
Liquid pipe
[mm(inch)]
Low pressure High pressure
Gas pipe [mm(inch)]
C3
~ C4
B1 ~ D10
E1 ~ A3
H
h
CAUTION
• * : Assume equivalent pipe
length of Y branch to be 0.5m,
calculation purpose.
HR1
48k 48k 48k
48k
1 2 3 4
HR1
36k 36k
A
A
1
1
2
A
HR2
36k
36k
3 4
HR1
15m
12k 12k24k
24k
1 2 3 4
HR2
48k 48k 48k 12k
5 6 7 8
HR1
12k 12k24k
24k
1 2 3 4
HR2
48k 48k 48k
12k
5 6 7 8
Prohibited pattern Prohibited pattern
Pattern
Indoor unit
• Capacity sum of indoor units is over 160kBtu/hr. • Distance between neighboring HR unit is over 10m,
and Capacity sum of indoor units is over 160kBtu/hr.
Y Branch pipe
Pattern
HR
Unit
Outdoor
Unit
Indoor
Unit
Low pressure Gas pipe
High pressure Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
CAUTION:
• Should not be exceed 10m
between neighboring HR unit.
• Serial connection of HR units :
Capacity sum of indoor units ≤
160kBtu/hr.