129
OCH668G
Header-Branch Method
Connection Examples
(Connecting to 4 Indoor Units)
Outdoor Unit
First Branch
Indoor unit
A
B
C
A+a+b+c+d
[
120 m
A+d
[
70 m
R
[
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)
■
Select Each Section of Refrigerant Piping
■
Selecting the Refrigerant Branch Kit
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)
(2) Refrigerant Piping Diameter In Section
From Branch to Indoor Unit (Indoor Unit
Piping Diameter)
Each
Section of
Piping
Branch header (4 branches)
CMY-Y64-G-E
Branch header (8 branches)
CMY-Y68-G-E
Liquid Pipe
Gas Pipe
Piping Diameter (mm)
Model
ø9.52
ø15.88
PUMY-SP112
PUMY-SP125
PUMY-SP140
B
A
A
a
b
c
C
c
C
C
d
H
h
L
r
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.
■
Additional refrigerant charge
Refer to the same section in the previous page.
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
