25
OCH634C
7-3-3. Mixed system (CITY MULTI indoor units and M/S/P series indoor units (Via Branch box)
Branch box
Port A
Port B
Port C
Port D
Port E
Branch box pipe size
System pipe size
A
A
E
B
C
C
D
D
a
b
c
d
e
f
g
h
i
j
E
E
E
E
E
F
F
F
F
F
A
Outdoor Unit
B
First joint
C
Branch header (CMY)
D
Branch box (PAC-MK·BC(B))
E
CITY MULTI Indoor unit
F
M/S/P series Indoor unit
L
1
L
2
Pipe size
A,B,C,D,E
A liquid pipe
B Gas pipe
L
1
[
60 m, or L
2
[
20 m
ø9.52
ø19.05
L
1
> 60 m, or L
2
> 20 m
ø12.7
ø19.05
L
1
:
The farthest piping length from the outdoor unit to an indoor unit.
L
2
:
The farthest piping length for the main pipes from the outdoor unit to the branch box.
• The line-up of a connectable indoor unit depends on a district/areas/country.
a,b,c – j
Indoor unit series Model number A liquid pipe B Gas pipe
CITY MULTI
15 – 50
ø6.35
ø12.7
63 – 140
ø9.52
ø15.88
200
ø9.52
ø19.05
M series or
S series
15 – 42 (09-13)
ø6.35
ø9.52
50 (18)
ø6.35
ø12.7
60 (24)
ø6.35
ø15.88
71 (26)
ø9.52
ø15.88
P series
35, 50 (18)
ø6.35
ø12.7
60 – 100 (26)
ø9.52
ø15.88
Note: When using 35, 50 type indoor unit of P series, use the flare nut attached to the indoor unit.
Do not use the flare nut in the indoor unit accessory. If it is used, a gas leakage or even a
pipe extraction may occur.
2-branch joint
CMY-Y62-G-E
4-branch header
CMY-Y64-G-E
8-branch header
CMY-Y68-G-E
Different-diameter joint (optional parts)
Model name Connected pipes diameter Diameter A Diameter B
mm
mm
mm
MAC-A454JP
ø9.52→ø12.7
ø9.52
ø12.7
MAC-A455JP
ø12.7→ø9.52
ø12.7
ø9.52
MAC-A456JP
ø12.7→ø15.88
ø12.7
ø15.88
PAC-493PI
ø6.35→ø9.52
ø6.35
ø9.52
PAC-SG76RJ-E
ø9.52→ø15.88
ø9.52
ø15.88
Different-diameter (deformed) joint
Model name Connected pipes diameter Outside diameter A Inside diameter A
mm
mm
mm
PAC-SG78RJB-E
ø9.52→ø12.7
ø9.52
ø12.7
PAC-SG79RJB-E
ø12.7→ø9.52
ø12.7
ø9.52
PAC-SG80RJB-E
ø12.7→ø15.88
ø12.7
ø15.88
PAC-SG77RJB-E
ø6.35→ø9.52
ø6.35
ø9.52
PAC-SG76RJB-E
ø9.52→ø15.88
ø9.52
ø15.88
PAC-SJ72RJB-E
ø15.88 → ø19.05
ø15.88
ø19.05
2-branch pipe (Joint): Optional parts (According to the connection method,
you can choose the favorite one.)
Model name
Connection method
MSDD-50AR-E
flare
MSDD-50BR-E
brazing
■ Installation procedure
Refer to the installation manual of optional parts.
(1) Valve size for outdoor unit
For liquid
ø9.52 mm
For gas
ø19.05 mm
(2) Valve size for branch box
A
UNIT Liquid pipe
ø6.35 mm
Gas pipe
ø9.52 mm
B
UNIT Liquid pipe
ø6.35 mm
Gas pipe
ø9.52 mm
C
UNIT Liquid pipe
ø6.35 mm
Gas pipe
ø9.52 mm
D
UNIT Liquid pipe
ø6.35 mm
Gas pipe
ø9.52 mm
E
UNIT Liquid pipe
ø6.35 mm
Gas pipe
ø12.7 mm
Note: 3-branch type : only
A
,
B
,
C
unit
Unit: mm
Unit: mm
