LG MULTI V ARUN***CTE4 Installation Manual page 35

Table of Contents

Total pipe length = A+B+C+a+b+c+d+e ≤ 1000m(3281ft)

Longest pipe length

A+B+b ≤ 150m(492ft)[200m(656ft)**] A+B+b ≤ 175m(574ft)[225m(738ft)**]

Longest pipe length after 1st branch

B+b ≤ 40m(131ft)[90m(295ft)**]

Difference in height (Outdoor Unit ÷ Indoor Unit)

H ≤ 110m(361ft)

Difference in height (Indoor Unit ÷ Indoor Unit)

h ≤ 40m(131ft)

Difference in height (Outdoor Unit ÷ Outdoor Unit)

h1 ≤ 5m(16ft)

• * : Assume equivalent piping length of Y branch to be 0.5m(1.64ft), that of header to be

1m(3.28ft), calculation purpose.

• ** : To apply Conditional Application

• Indoor Unit should be installed at lower position than the header.

WARNING

• It is recommended that difference of piping length for pipes connected to the Indoor Unit

is minimized. Performance difference between Indoor Units may occur.

• When the any one (or both ) of below conditions are satisfied, the diameter of main pipe

(A) must be increased according to below table.

- The equivalent length between outdoor unit and the farthest indoor unit is 90m(295ft) or

more (Liquid and Gas pipes are increased)

- The level difference (Outdoor unit ÷ Indoor unit) is 50m(164ft) or more (Only liquid pipe

is increased)

Refrigerant pipe diameter from outdoor unit to first branch. (A)

Upward Outdoor

unit

Standard Pipe Diameter

total capacity

Liquid pipe

Ton

[mm(inch)]

Ø 9.52(3/8)

10 ~ 12 12 ~ 14 Ø 12.7(1/2) Ø 28.58(1-1/8) Ø 15.88(5/8) not increased Ø 15.88(5/8) not increased

14~18 18~22 Ø 15.88(5/8) Ø 28.58(1-1/8) Ø 19.05(3/4) Ø 31.8(1-1/4) Ø 19.05(3/4) not increased

Ø 15.88(5/8) Ø 34.9(1-3/8) Ø 19.05(3/4) not increased Ø 19.05(3/4) not increased

22 ~ 28 26 ~ 34 Ø 19.05(3/4) Ø 34.9(1-3/8)

Ø 19.05(3/4) Ø 41.3(1-5/8)

• If the step up size is not available, you can not select the next higher size available.

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT

When pipe length is 90m or