LG ARUN BTE4 Series Installation Manual page 14

14
(Example 1)
Toward indoor unit
(Example 2)
Toward indoor unit
Pipe inclination (2° or more)
(Example 3)
Toward indoor unit
- Apply Oil Trap as shown below when the length of the pipe between
the outdoor units is more than 2m. Otherwise, the unit may not oper-
ate properly.
(Example 1)
2m
Toward indoor unit
(Example 2)
2m
Toward indoor unit
- When connecting the pipes between the outdoor units, the accumu-
lation of oil in the slave outdoor unit should be avoided. Otherwise,
the unit may not operate properly.
(Example 1)
Toward indoor unit
(Example 2)
Toward indoor unit
Toward indoor unit
Toward indoor unit
Toward indoor unit
Oil Trap
2m
Toward indoor unit
h
(Example 3)
Toward indoor unit
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) Total liquid pipe : Ø25.4 mm
+
Total liquid pipe : Ø22.2 mm
+
Total liquid pipe : Ø19.05 mm
+
Total liquid pipe : Ø15.88 mm
+
Total liquid pipe : Ø12.7 mm
+
Total liquid pipe : Ø9.52 mm
+
Total liquid pipe : Ø6.35 mm
CF value of indoor unit
Amount refrigerant of Indoor units
Example) 4Way Ceiling Cassette 14.5kW -1ea, Ceiling concealed
Duct 7.3kW-2ea, Wall Mounted 2.3kW-4ea
CF = 0.64 × 1 + 0.26 × 2 + 0.24 × 4 = 2.12 kg
Attach the additional refrigerant table of IDU.
! CAUTION
Use only 2-series of indoor unit. Ex) ARNU***2
Do not connect Hydrokit with Multi V IV Models.
Oil Trap
h
Toward indoor unit
x 0.480(kg/m)
x 0.354(kg/m)
x 0.266(kg/m)
x 0.173(kg/m)
x 0.118(kg/m)
x 0.061(kg/m)
x 0.022(kg/m)
h