Installation Manual

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.
Ø 12.7(1/2 inch)
Connector
Outdoor unit
Liquid
side piping
Main Liquid
side valve
Main gas
side valve
ROOM A
ROOM B
ROOM C
Gas side
piping
Connection of piping - Outdoor
Outside diameter Torque
mm inch N
.
m kgf
.
m lbf
.
ft
Ø 6.35 1/4 14~18 1.4~1.8 10~13
Ø 9.52 3/8 34~42 3.5~4.3 25~31
Ø 12.7 1/2 49~61 5.0~6.2 36~45
Ø 15.88 5/8 69~82 7.0~8.4 51~60
Ø 19.05 3/4 100~120 10.0~12.2 73~88
Outdoor unit (36,42 kBtu/h class)
(only indoor units
7,9,12,15,18,24 kBtu/h class)
(only indoor units
24,36 kBtu/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 ROO
M
BD Unit
Refrigerant Connections Pipe
Size (inch (mm))
Connectable
Indoor Unit
Capacity (kBtu/h
class)
Liquid Gas
PMBD3620
1/4 (Ø 6.35)
x 2 EA
3/8 (Ø 9.52) x 2
EA
7,9,12,15,18,24 k
PMBD3630
1/4 (Ø 6.35)
x 3 EA
3/8 (Ø 9.52) x 3
EA
7,9,12,15,18,24 k
PMBD3640
1/4 (Ø 6.35)
x 4 EA
3/8 (Ø 9.52) x 4
EA
7,9,12,15,18,24 k
PMBD3641
1/4 (Ø 6.35)
x 4 EA
3/8 (Ø 9.52)
x 3 EA
7,9,12,15,18,24 k
(A,B,C ROOM)
1/2 (Ø 12.7)
x 1 EA
24,36 k
(D ROOM)
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)