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30 Multi Air Conditioner
Flaring Work and Connection of Piping
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.
Outdoor unit (18,24,30kBtu/h class)
(only Indoor units
18,24kBtu/h class)
Liquid
side piping
Main liguid
side valve
Main gas
side valve
ROOM A
ROOM B
ROOM C
Gas side
piping
Outdoor unit (36,42kBtu/h class)
(only indoor units
18,24kBtu/h class)
(only indoor units
36kBtu/h class- connect “D ROOM”)
(BD Unit : PMBD3641)
(BD Unit : PMBD3640)
A ROOM
B ROOM
C ROOM
D ROOM
A ROOM
B ROOM
C ROOM
D ROOM
Connection of piping - Outdoor
Outside diameter Torque
mm inch N. m kgf.m lbf.ft
Ø6.35 1/4 14~18 1.4~1.8 10~13
Ø9.52 3/8 34~42 3.5~4.3 25~31
Ø12.7 1/2 49~61 5.0~6.2 36~45
Ø15.88 5/8 69~82 7.0~8.4 51~60
Ø19.05 3/4 100~120 10.0~12.2 73~88
BD Unit
Refrigerant Connections Pipe
Size (inch (mm))
Connectable
Indoor Unit
Capacity (kBtu/h
class)
Liquid Gas
PMBD3620
1/4 (Ø6.35)
x 2EA
3/8 (Ø9.52) x
2EA
7,9,12,15,18,24k
PMBD3630
1/4 (Ø6.35)
x 3EA
3/8 (Ø9.52) x
3EA
7,9,12,15,18,24k
PMBD3640
1/4 (Ø6.35)
x 4EA
3/8 (Ø9.52) x
4EA
7,9,12,15,18,24k
PMBD3641
1/4 (Ø6.35)
x 4EA
3/8 (Ø9.52)
x 3EA
7,9,12,15,18,24k
(A,B,C ROOM)
1/2 (Ø12.7)
x 1EA
24,36k
(D ROOM)
h BD Unit(PMBD3641) includes the socket.
(Ø 12.7 → Ø 15.88 x 1EA, Ø 6.35 → Ø 9.52 x 1EA)
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