Mitsubishi Electric PUMY-P200YKM2 Technical & Service Manual page 124

Branch box Method
Connection Examples
(Connecting to 8 Indoor Units)
Total piping length
Farthest piping length (L)
Permissible
Piping length between outdoor unit and branch boxes
length
(One-way)
Farthest piping length after branch box (1)
Total piping length between branch boxes and indoor units
In indoor/outdoor section (H)*
Permissible
height
In branch box/indoor unit section (h1)
difference
In each branch unit (h2)
(One-way)
In each indoor unit (h3)
Number of bends
Branch box should be placed within the level between the outdoor unit and indoor units.
1
*
■ Select Each Section of Refrigerant
Piping
(1) Section From Outdoor
Unit to Branch box (A, B,
C)
(2) Sections From Branch
box to Indoor Unit (a to h)
Select the size from the table to the
right.
■ Additional refrigerant charge
OCH675D
H H
h1
1
(1) Refrigerant Piping Diameter In Section From Outdoor Unit to First Branch (Out- door Unit Piping Diameter)
A
Each
L [ 20m
Section of
Piping L > 20m
L: The farthest piping length from the outdoor unit to an indoor unit.
(2) Refrigerant Piping Diameter In Section From Branch box to Indoor Unit (Indoor Unit Piping Diameter)
Indoor unit series
M series or
S series
P series
Refer to the same section in the previous page.
A
A
L
C
B
B
C
h2 h2
a b c d e f
D
D
D D D
D
h3
A + B + C + a + b + c + d + e + f + g + h [ 150 m
A + C + h [ 80 m
A + B + C [55 m
l [ 25 m
a + b + c + d + e + f + g + h [ 95 m
H [ 50 m (In case of that outdoor unit is set higher than indoor unit)
H [ 40 m (In case of that outdoor unit is set lower than indoor unit)
h1 + h2 [15 m
h2 [ 15 m
h3 [ 12 m
[ 15
Piping Diameter (mm)
Liquid pipe Gas pipe
ø9.52
ø19.05
ø12.7
kW type
A Liquid pipe
15–42
ø6.35 mm
50 ø6.35 mm
60 ø6.35 mm
71 ø9.52 mm
35–50 ø6.35 mm
60–100 ø9.52 mm
124
AOutdoor unit
BBranching joint
CBranch box
DIndoor unit
C
l
g h
D
D
B,C
Total capacity Liquid pipe
of indoor units (mm)
L [ 20m
ø9.52
Up to 16.0kW
L > 20m ø12.7
L [ 20m
ø9.52
16.1 to 29.1kW
L > 20m ø12.7
B Gas pipe
ø9.52 mm
ø12.7 mm
ø15.88 mm
ø15.88 mm
ø12.77 mm
ø15.88 mm
Gas pipe
(mm)
ø15.88
ø19.05