Charging - LG FLEX MULTI SPLIT Installation Instructions Manual

Charging

Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a
7.5m(25ft) line set for each indoor line.
Any time total line set is used either shorter or longer then the nominal 22.5m(75ft: for tri-zone)
line set length the refrigerant charge has to be adjusted.
Whether the line set is made shorter or longer you must adjust the charge based on how many ft
of tubing are either added or removed based on 20g(0.22oz) of R-410A per meter(foot).
Max total
Capacity
length of all
(Btu/h)
pipes (A+B+C)
24k 30m(100ft)
36k 45m(150ft)
Example:
A 80ft line set is used for tri - zone 5 additional ft X 0.22 ounces per foot= add 1.1
ounces of R-410A
Important:
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using
the unit nameplate charge adjusting for line sets longer or shorter than 7.5m(25ft) for each indoor
unit.
Max length of Min length of
each pipe each pipe
(A/B/C) (A/B/C)
15m(50ft) 3m(10ft)
15m(50ft) 3m(10ft)
Max Elevation Max elevation
between each between
indoor unit and indoor units
outdoor unit (h1) (h2)
7.5m(25ft) 7.5m(25ft)
7.5m(25ft) 7.5m(25ft)
Installation Manual 27
Charging
Additional
Refrigerant
20g/m(0.22oz/ft)
20g/m(0.22oz/ft)