Charging - LG LAN091CNP, LAU091CNP, LAN121CNP Service Manual

Charging

Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line set.
Any time a line set is used either shorter or longer then the nominal 7.5m(25ft) 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).
Pipe Size
Capacity
(Btu/h)
Suction
9k, 12k Ø12.7mm(1/2") Ø6.35mm(1/4")
Example:
A 30ft line set is used
5 additional ft X 0.22 ounce 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).
Confirm the refrigerant R-410A. Use manifold gauge and hose for R-410A.
Standard
Length
Evap
m(ft)
7.5(25)
Max.
Max.
Elevation length
m(ft) m(ft)
B A
7.5(25) 15(49)
Air purgingd
Additional
Refrigerant
g/m(oz/ft)
20(0.22)
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