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Installation Manual 17
ENGLISH
Installation
Connection of piping - Indoor, Outdoor, BD Unit
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.
Align the center of the piping and sufficiently
tighten the flare nut by hand.
(only indoor units
36 kBtu/h connect “D ROOM”)
A ROOM
B ROOM
C ROOM
D ROOM
(Only indoor units
18/24 kBtu/h)
A ROOM
B ROOM
C ROOM
D ROOM
Indoor unit tubing Flare nut Pipes
Torque Wrench
Indoor unit tubing
Open-end wrench (fixed)
Connection pipe
Flare nut
(Only Indoor Units 18/24 kBtu/h)
ODU IDU
For Multi Zone
(PMBD3620 / PMBD3630 / PMBD3640)
(PMBD3641)
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
BD Unit
Refrigerant Connections
Pipe Size (inch (mm))
Connectable
Indoor Unit
Capacity
(kBtu/h)
Liquid Gas
PMBD3620
1/4 (Ø 6.35)
x 2 EA
3/8 (Ø 9.52)
x 2 EA
18/24
PMBD3630
1/4 (Ø 6.35)
x 3 EA
3/8 (Ø 9.52)
x 3 EA
18/24
PMBD3640
1/4 (Ø 6.35)
x 4 EA
3/8 (Ø 9.52)
x 4 EA
18/24
PMBD3641
1/4 (Ø 6.35)
x 4 EA
3/8 (Ø 9.52)
x 3 EA
18/24
(A/B/C ROOM)
1/2 (Ø 12.7)
x 1 EA
36
(D ROOM)
BD Unit(PMBD3641) includes the sockets.
(Ø 12.7 → Ø 15.88 x 1 EA, Ø 6.35 → Ø 9.52 x 1 EA)
Indoor Unit (18/24k) includes the sockets.
(Ø 9.52 → Ø 6.35 x 1 EA, Ø 15.88 → Ø 12.7 x 1 EA,
Ø 9.52 → Ø 12.7 x 1 EA)
ODU
Capacity
(kBtu/h)
Refrigerant Connections
Pipe size
Liquid Gas
Single
Zone
18
3/8 (Ø 9.52) 5/8 (Ø 15.88)
24
36
42
48
Multi
Zone
18 1/4 (Ø 6.35) 1/2 (Ø 12.7)
24 1/4 (Ø 6.35) 1/2 (Ø 12.7)
36 3/8 (Ø 9.52) 5/8 (Ø 15.88)
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