LG FLEX MULTI SPLIT Installation Manual page 13

Distributor Piping Type
Max total length
Outdoor Unit
of all pipes
Capacity
(Main + Branch
(Btu/h class)
pipes)
54k 145(476)
Indoor unit Capacity (Btu/h class)
9k
12k
18k
CAUTION: Capacity is based on standard length and maximum allowance
length is on the basis of reliability.
Max length Max length
of of
Main pipe Branch
Branch pipe
(A+B+C) pipes
55(180) 90(295)
Distributor
C
Distributor
h1
A
Installation of Indoor, Outdoor Unit
Min length of
Max length each pipe
of each (Main / indoor unit and
Branch
pipes)
15(49) 3(10)
Pipe Diameter
Unit : mm(inch)
Gas
9.52(3/8)
9.52(3/8)
12.7(1/2)
Branch Pipe
B
Main Pipe
Unit : m(ft)
Max Elevation Max Eleva-
Between each tion
Between in-
outdoor unit door
(h1) (h2)
30(98) 15(49)
Liquid
6.35(1/4)
6.35(1/4)
6.35(1/4)
h2
Installation Manual 13
Max Combi-
nation
of indoor
unit
73k