125
OCH634C
Mixed Method
Connection Examples
(Connecting to 1 Branch box)
E
H
L1
h1
L2
h3
h1
D
A
B
A
B
C
D
aa
b
C
C
E
E
E
E
E
F
F
F
F
F
f
g
i
h
j
f
g
i
h
j
d
e
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
Permissible
length
(One-way)
Total piping length
A+B+C+D+E+a+b+c+d+e+f+g+h+i+j
[
150 m
Farthest piping length (L1)
A+E+a or A+B+C+e
[
80 m
Farthest piping length. Via Branch box (L2)
A+B+C+D+j
[
80 m
Piping length between outdoor unit and branch box A+B+C+D
[
55 m
Farthest piping length from the first joint
B+C+D or B+C+e
[
30 m
Farthest piping length after branch box
j
[
25 m
Total piping length between branch boxes and indoor units
f+g+h+i+j
[
95 m
Permissible
height
difference
(One-way)
In indoor/outdoor section (H)*
1
H
[
50 m (In case of outdoor unit is set higher than indoor unit)
H
[
40 m (In case of outdoor unit is set lower than indoor unit)
In branch box/indoor unit section (h1)
h1
[
15 m
In each indoor unit (h3)
h3
[
12 m
Number of bends
[
15
*
1
Branch box should be placed within the level between the outdoor unit and indoor units.
■ Selecting the Refrigerant Branch Kit
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.)
Branch header (4 branches)
Branch header (8 branches)
CMY-Y64-G-E
CMY-Y68-G-E
■ Select Each Section of Refrigerant
Piping
(1) Section From Outdoor
Unit to Branch box or
Branch header (A to E)
Each
Section of
Piping
(2) Sections From Branch
box or Branch header to
Indoor Unit (a to j)
Select the size from the table to the
right.
(1) Refrigerant Piping Diameter In Section From Outdoor Unit to Branch box or Branch header
(Outdoor Unit Piping Diameter)
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.
(2) Refrigerant Piping Diameter In Section From Branch box or Branch header to Indoor Unit
(Indoor Unit Piping Diameter)
Indoor unit series
Model number
A Liquid pipe
B Gas pipe
CITY MULTI
15–50
ø6.35 mm
ø12.7 mm
63–140
ø9.52 mm
ø15.88 mm
200
ø9.52 mm
ø19.05 mm
M series or S series
15–42 (09–13)
ø6.35 mm
ø9.52 mm
50 (18)
ø6.35 mm
ø12.7 mm
60 (24)
ø6.35 mm
ø15.88 mm
71 (26)
ø9.52 mm
ø15.88 mm
P series
35, 50 (18)
ø6.35 mm
ø12.7 mm
60–100 (26)
ø9.52 mm
ø15.88 mm
Note:
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.
Model
Piping Diameter (mm)
PUMY-P200
Liquid pipe
L
1
[
60 m or L
2
[
20 m
ø9.52
L
1
> 60 m or L
2
> 20 m
ø12.7
Gas Line
ø19.05
