Connection Of Piping - Outdoor - LG A8UW54GFA0 Installation Manual

Flaring Work and Connection of Piping

Connection of piping - Outdoor

Align the center of the piping and sufficiently
tighten the flare nut by hand.
Connecting pipe order
1) ROOM A~C gas side pipe
2) ROOM A~C liquid side pipe
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.
Outside diameter
mm inch
Ø 6.35 1/4
Ø 9.52 3/8
Ø 12.7 1/2
Ø 15.88 5/8
Ø 19.05 3/4 100~120 10.0~12.2
Refrigerant Connections Pipe
Size (inch (mm))
BD Unit
Liquid
1/4 (Ø 6.35)
PMBD3620
x 2 EA
1/4 (Ø 6.35)
PMBD3630
x 3 EA
1/4 (Ø 6.35)
PMBD3640
x 4 EA
1/4 (Ø 6.35)
PMBD3641
x 4 EA
h BD Unit(PMBD3641) includes the socket.
(Ø 12.7 → Ø 15.88 x 1 EA, Ø 6.35 → Ø 9.52 x 1 EA)
30 Multi Air Conditioner
Torque
N . m kgf . m lbf . ft
14~18 1.4~1.8 10~13
34~42 3.5~4.3 25~31
49~61 5.0~6.2 36~45
69~82 7.0~8.4 51~60
73~88
Connectable
Indoor Unit
Capacity (kBtu/h
class)
Gas
3/8 (Ø 9.52) x 2
7,9,12,15,18,24 k
EA
3/8 (Ø 9.52) x 3
7,9,12,15,18,24 k
EA
3/8 (Ø 9.52) x 4
7,9,12,15,18,24 k
EA
3/8 (Ø 9.52) 7,9,12,15,18,24 k
x 3 EA (A,B,C ROOM)
1/2 (Ø 12.7) 24,36 k
x 1 EA (D ROOM)
Outdoor unit
Main Liquid
side valve
Liquid
side piping
Outdoor unit (36,42 kBtu/h class)
(BD Unit : PMBD3640)
(only indoor units
18,24 kBtu/h class)
(BD Unit : PMBD3641)
(only indoor units
36 kBtu/h class- connect "D ROOM")
Ø 12.7(1/2 inch)
Connector
Main gas
side valve
Gas side
piping
ROOM A
ROOM B
ROOM C