Piping Length And Elevation - LG FLEX MULTI SPLIT Installation Manual

Installation of Indoor, Outdoor Unit

Piping length and elevation

Multi Piping Type
Max total length
Outdoor Unit
of all pipes
Capacity
(A+B)/(A+B+C)/
(Btu/h class)
(A+B+C+D)
18k 50(164)
24k 75(246)
36k 75(246)
Indoor unit Capacity (Btu/h class)
12k
18k
CAUTION: Capacity is based on standard length and maximum allowance
length is on the basis of reliability.
12 Multi Air Conditioner
Max length of
each pipe
(A/B/C/D)
25(82)
25(82)
25(82)
9k
Max Elevation
Min length of
between each
each pipe
indoor unit and
(A/B/C/D)
outdoor unit (h1)
3(10) 15(49)
3(10) 15(49)
3(10) 15(49)
Pipe Diameter
Unit : mm(inch)
Gas
9.52(3/8)
9.52(3/8)
12.7(1/2)
A
B
C
D
Unit : m(ft)
Max elevation Max.Combination
between indoor of Indoor unit
units (h2) (Btu/h class)
7.5(25) 24k
7.5(25) 33k
7.5(25) 48k
Liquid
6.35(1/4)
6.35(1/4)
6.35(1/4)
h2
h1