LG ARUM080LTE5 Engineering Product Data Book page 727

Multi V 5
7. Refrigerant piping system
■ Refrigerant pipe diameter from branch to branch (B,C)
Downward indoorunit total
capacity[kW(Btu/h)]
≤ 5.6(19,100)
< 16.0 (54,600)
< 22.4 (76,400)
< 33.6(114,700)
< 50.4(172,000)
< 67.2(229,300)
< 72.8(248,400)
< 100.8(344,000)
< 173.6(592,500)
< 184.8(630,700)
≤ 291.2(993,600)
■ (**) Conditional Application
If the below conditions are satisfied, limit of longest pipe length after 1st branch( l) could be extended by 40m
(131ft)→ 90m(295ft).
1. Pipe diameter Size Up
Pipe diameter(only Liquid/low pressure gas pipes) between 1st branch and last branch(HR unit) is increased by
one step. If the pipe diameter of B, C3 is same as A, it is not necessary.
: Ø 6.35 → Ø 9.52 → Ø 12.7 → Ø 15.88 → Ø 19.05 → Ø 22.2 → ...
If available on site, select pipe size from the pipe diameter table according to capacity.
Otherwise it doesn't need to be increased.
2. Correction for calculating the total pipe length
When calculating total pipe length, pipe B,C,D length should be calculated twice.
: A + B x 2 + C3 x 2 + D x 2 + C1 + C2 + a + b + c + d + e + f + g + i + j + k + l + m + n ≤ 1,000m (3,281ft)
3. Indoor unit pipe length
Length of pipe from each indoor unit to the closest HR unit (a, b, c, d, e, f, g, i, j, k, l, m, n) ≤ 40m (131ft).
4. Difference in length between outdoor unit and the farthest or closest indoor unit
[Length of pipe from outdoor unit to the farthest indoor unit 12 (B + C3 + D + k)]
- [Length of pipe from outdoor unit to the closest indoor unit 1 (C1 + a)] ≤ 40m (131ft)
16
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)
Ø15.88(5/8)
Ø19.05(3/4)
Ø19.05(3/4)
Ø22.2(7/8)
Ø22.2(7/8)
Installation of Outdoor Units
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)
Ø34.9(1-3/8)
Ø41.3(1-5/8)
Ø41.3(1-5/8)
Ø53.98(2-1/8)
High pressure
Ø9.52(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø22.2(7/8)
Ø22.2(7/8)
Ø28.58(1-1/8)
Ø28.58(1-1/8)
Ø34.9(1-3/8)
Ø34.9(1-3/8)
Ø41.3(1-5/8)