LG ARUN040GSS5 Installation Manual page 38

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
38
The amount of Refrigerant
The calculation of the additional charge should take into account the length of pipe and
CF(correction Factor) value of indoor unit.
Additional charge(kg)
Amount refrigerant of Indoor units
Example) 4Way Ceiling Cassette 14.5 kW -1 ea, Ceiling concealed Duct w7.3 kW-2 ea,
Wall Mounted 2.3 kW-4 ea
CF = 0.64 × 1 + 0.26 × 2 + 0.24 × 4 = 2.12 kg
Attach the additional refrigerant table of IDU.
CAUTION
!
Do not connect 0 or 1 series of indoor unit. ex)ARNU****0(X) , ARNU****1(X)
= Total liquid pipe : Ø 12.7 mm
+ Total liquid pipe : Ø 9.52 mm
+ Total liquid pipe : Ø 6.35 mm
+ CF value of indoor unit (kg)
x 0.118 (kg/m)
x 0.061 (kg/m)
x 0.022 (kg/m)