130
OCH668G
Method of Combined Branching of Lines and
Headers
Connection Examples
(Connecting to 5 Indoor Units)
Outdoor unit
First branching (branching
joint)
Branching joint
Indoor unit
Branching header
Blind caps
A
B
C
D
E
F
A+B+C+a+b+c+d+e
[
120 m
A+B+b
[
70 m
B+b
[
50 m
H
[
50 m (If the outdoor unit is lower,
H
[
30 m)
h
[
15 m
Please select branching kit, which is sold separately, from the table below.
(The kit comprises sets for use with liquid pipes and for use with gas pipes.)
Total Piping Length
Farthest Piping Length
Farthest Piping Length After First Branch
High/Low Difference in Indoor/Outdoor Section
High/Low Difference in Indoor/Indoor Section
Permissible
Length
Permissible High/
Low Difference
(L)
(
R
)
(H)
(h)
■
Selecting the Refrigerant Branch Kit
■
Select Each Section of Refrigerant Piping
Select the size from the table to the right.
(1) Refrigerant Piping Diameter In Section
From Outdoor Unit to First Branch (Out-
door Unit Piping Diameter)
(1) Section From Outdoor Unit
to First Branch (A)
(2) Section From Branch to
Indoor Unit (a,b,c,d,e)
(3) Section From Branch to
Branch (B,C)
(3) Refrigerant Piping Diameter In Section
From Branch to Branch
(2) Refrigerant Piping Diameter In Section
From Branch to Indoor Unit (Indoor Unit
Piping Diameter)
Each
Section of
Piping
Branch Joint
CMY-Y62-G-E
Branch Header (4 branches)
CMY-Y64-G-E
Branch Header (8 branches)
CMY-Y68-G-E
■
Additional refrigerant charge
Refer to the same section in the previous page.
B
A
E
F
C
D
D
D
D
D
A
C
b
B
3
H
h
4
L
R
5
1
2
c
d
e
a
Note: Pipe re-branching after the header branching
is not possible.
Liquid Pipe (mm)
Gas Pipe (mm)
ø15.88
ø9.52
Liquid Pipe
Gas Pipe
Piping Diameter (mm)
Model
ø9.52
ø15.88
PUMY-SP112
PUMY-SP125
PUMY-SP140
Liquid Pipe
Gas Pipe
Piping Diameter (mm)
Model number
– 50
63 – 140
ø12.7
ø9.52
ø15.88
Liquid Pipe
ø6.35
Gas Pipe
ø9.52
R
[
30 m
R > 30 m
Note:
• R indicates the piping length after the first
branch.
• When connecting the CONNECTION KIT
(PAC-LV11M-J) and an M-series indoor
unit, refer to the installation manual for the
CONNECTION KIT when selecting the
pipe size and piping length.