133
OCH668G
*Branch box should be placed within the level between the outdoor unit and indoor units.
Mixed Method
Connection Examples
(Connecting to 2 Branch boxes)
A+B+C+D+E+a+b+c+d+e+f+g+h+i+j+k
[
120 m
A+E+a
[
70 m
A+B+C+k
[
80 m
A+B+C+D
[
55 m
B+C or E+a
[
50 m
k
[
25 m
A+B+C
[
55 m
d+e+f+g+h+i+j+k
[
95 m
H
[
50 m (When outdoor unit is set higher than indoor unit)
H
[
30 m (When outdoor unit is set lower than indoor unit)
h1+h2
[
15 m
h2
[
15 m
h3
[
12 m
[
15
Total piping length
Farthest piping length (L1)
Farthest piping length. Via Branch box (L2)
Piping length between outdoor unit and branch boxes
Farthest piping length from the first joint
Farthest piping length after branch box
Farthest branch box form outdoor unit
Total piping length between branch boxes and indoor units
In indoor/outdoor section (H)*
In branch box/indoor unit section (h1)
In each branch unit (h2)
In each indoor unit (h3)
Permissible
length
(One-way)
Permissible
height
difference
(One-way)
Number of bends
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.)
■
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 Branch box or Branch
header (Out-door Unit Piping Diameter)
(1) Section From Outdoor Unit
to Branch box or Branch
header (A to E)
(2) Sections From Branch
box or Branch header to
Indoor Unit (a to k)
(2) Refrigerant Piping Diameter In Section From Branch box or Branch header 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
L2
L1
H
h2
H
h2
h1
h3
A
C
B
b
c
a
b
c
E
E
F
F
F
F
E
E
A
BB
A
D
C
C
j
i
k
D
d
e
g
f
h
F
F
F
F
D
A
Outdoor Unit
B
First joint
C
Branch header
D
Branch box
E
CITY MULTI Indoor unit
F
M, S, P series Indoor unit
■
Additional refrigerant charge
Refer to the same section in the previous page.
Liquid Pipe
Gas Pipe
Piping Diameter (mm)
Model
ø9.52
ø15.88
PUMY-SP112
PUMY-SP125
PUMY-SP140
– 50
50
71, 80
35, 50
60 – 100
60
63 – 140
15 – 42
ø6.35
ø6.35
ø9.52
ø9.52
ø6.35
Model number
Liquid Pipe
Gas Pipe
Indoor unit series
CITY MULTI
M series or
S series
P series
ø12.7
ø15.88
ø15.88
ø6.35
ø12.7
ø9.52
ø15.88
ø15.88
ø9.52
ø12.7
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.
ø6.35
ø9.52
R
[
30 m
R > 30 m
*
If the pipe size of
indoor unit is different,
use a different-diameter
joint.
(mm)
