LG JB-Q66LRA0 Installation Manual page 21

Note that excessive gas pressure will generate
pinholes at brazed points.
(Nitrogen gas: Supply pressure 0.05 ~ 0.1 kg/
2
cm G)
• When supplying inert gas, be sure to open one
end of piping.
Connecting Pipes to the
Outdoor Unit
1
Align the center of the pipings and sufficiently
tighten the flare nut with fingers.
2
Finally tighten the flare nut with torque wrench
until the wrench clicks.
• When tightening the flare nut with torque
wrench, ensure the direction for tightening
follows the arrow on the wrench.
Outdoor unit
a
b Gas side piping (Bigger Dia.)
c Liquid side piping (Smaller Dia.)
d Torque wrench
Pipe size (mm/inch)
6.35 (1/4)
9.52 (3/8)
12.7 (1/2)
15.88 (5/8)
19.05 (3/4)
Checking the Drainage
1
Remove the air filter.
2
Check the drainage.
• Spray one or two glasses of water upon the
evaporator.
• Ensure that water flows drain hose of indoor
unit without any leakage.
Connecting Cable between
Indoor and Outdoor Unit
Connecting cables to the indoor unit
Connect the wires to the terminals on the control
board individually according to the outdoor unit
connection.
• Please do the interconnection as per
interconnection table in wiring diagram.
INSTALLATION
Torque (kg.m)
1.8
4.2
5.5
6.6
6.6
21