Mitsubishi Electric CITY MULTI PUMY-P112VKM5 Technical & Service Manual page 131

Mixed Method
Connection Examples
(Connecting to 1 Branch box)
Total piping length
Farthest piping length (L1)
Farthest piping length. Via Branch box (L2)
Permissible
length Piping length between outdoor unit and branch box
(One-way)
Farthest piping length from the first joint
Farthest piping length after branch box
Total piping length between branch boxes and indoor units
In indoor/outdoor section (H)
Permissible
height
difference
In branch box/indoor unit section (h1)
(One-way)
In each indoor unit (h3)
Number of bends
*1 Branch box should be placed within the level between the outdoor unit and indoor units.
*2 When a cylinder unit or hydrobox is connected, the maximum piping length is 150 m.
■ Selecting the Refrigerant Branch Kit
■ Select Each Section of Refrigerant Piping
(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 j)
Select the size from the table to the right.
■ Additional refrigerant charge
OCH740
L1
B
C
E
b C
a a
E E
E
*1
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)
CMY-Y64-G-E
(1) Refrigerant Piping Diameter In Section From Outdoor Unit to Branch box or Branch header
(Outdoor Unit Piping Diameter)
Model
Each
P112 Liquid Line
Section of
P125
Piping
P140
(2) Refrigerant Piping Diameter In Section From Branch box or Branch header to Indoor Unit
(Indoor Unit Piping Diameter)
Indoor unit series
CITY MULTI
M series or
S series
P series
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.
Refer to the same section in the previous page.
A
L2
A
B
C D
d
e
f f g g
E E F
F
A+B+C+D+E+a+b+c+d+e+f+g+h+i+j [ 300 m
A+E+a or A+B+C+e [ 85 m
A+B+C+D+j [ 80 m
A+B+C+D [ 55 m
B+C+D or B+C+e [ 30 m
j [ 25 m
f+g+h+i+j [ 95 m
H [ 50 m (In the case of outdoor unit is set higher than indoor unit)
H [ 40 m (In the case of outdoor unit is set lower than indoor unit)
h1 [ 15 m
h3 [ 12 m
[ 15
Branch header (8 branches)
CMY-Y68-G-E
Piping Diameter (mm)
ø9.52
Gas Line ø15.88
Model number A Liquid pipe (mm)
10 – 50 ø6.35
63 – 140 ø9.52
15 – 42 ø6.35
50 ø6.35
60 ø6.35
71 ø9.52
35,50 ø6.35
60 – 100 ø9.52
131
A Outdoor Unit
B First joint
C Branch header
D Branch box
E CITY MULTI Indoor unit
F M, S, P series Indoor unit
D
h h i i
j j
F F
F
*2
B Gas pipe (mm)
ø12.7
ø15.88
ø9.52
ø12.7
ø15.88
ø15.88
ø12.7
ø15.88