LG L8UH100BFA0 Installation Manual page 23

Piping Connection
Connection of the pipes-Outdoor
1. When piping installation work you must be
used the connector.
Connecting pipe size
Indoor Units
12, 18 kBtu/h Ø12.7(1/2")
24, 30, 36 kBtu/h Ø15.88(5/8")
48 kBtu/h Ø19.05(3/4")
2. Align the center of the pipings and sufficiently
tighten the flare nut by hand
3. 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.
CAUTION: Use two wrenches and
tighten with regular torque.
NOTICE
• In case of 100 kBtu/h Outdoor Unit: Use Short
Tube for connecting 48 kBtu/h indoor unit to
the outdoor unit, not the Branch Distributor.
• In case of 150 kBtu/h Outdoor Unit: Use Y
Connector for connecting 48 kBtu/h indoor
unit to the Branch Distributor.
Gas side Liquid side
Ø6.35(1/4")
Ø6.35(1/4")
Ø9.52(3/8")
Connecting Pipes to the Indoor Unit
Outdoor unit
B-UNIT
A-UNIT
Liquid side piping
Torque
wrench
Outside diameter
mm inch
Ø6.35 1/4
Ø9.52 3.8
Ø12.7 1/2
Ø15.88 5/8
Ø19.05 3/4
Outdoor unit
Short tube connector
Torque
wrench
Liquid side piping
Gas side piping
Torque
kgf . cm
180~250
340~420
550~560
630~820
990~1 210
B-UNIT
A-UNIT
Liquid side piping
Installation Manual 23