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Refrigerant Piping
N
. o
P
p i
n i
g
p
r a
s t
Branching section
(4)
Branching pipe
↓
Branching section
Branching section
(5)
↓
connecting pipe
Indoor unit
(6)
Branching section
branching joint
(7)
Branching section
Branching header
Outdoor unit
connection piping
(8)
Branching section
kit (For linking of
outdoor units)
N
a
m
e
Pipe size between branching sections
Total capacity codes of
indoor units at downstream side
Equivalent to HP
below 2.4
2.4 to below 6.4
6.4 to below 12.2
12.2 to below 20.2
20.2 to below 22.4
22.4 to below 25.2
25.2 to below 35.2
35.2 or more
Connecting pipe size of indoor unit
Indoor unit
007 to 012 type
0
1
5
o t
0
1
8
y t
0
2
4
o t
0
5
6
y t
0
7
2
o t
0
9
6
y t
Selection of branching section (Y-shaped branching joint)
Y-shaped
Y-shape
branching joint
Selection of branching section (Branching header)
*2
Branching header
*2: Up to a total of 6.0 maximum equivalent to HP capacity codes is connectable to one line
after branching of header. When the total capacity codes of all outdoor units are 12 to
below 26 (equivalent to HP) and you use a branching header for the first branching
section, use a RBM-HY2043E or RBM-HY2083E regardless of the total capacity codes
of outdoor units at downstream side. In addition, you cannot use a branching header for
the first branching section when the total capacity codes of all outdoor units are over
26 (equivalent to HP).
Outdoor unit connection piping kit (For linking of outdoor units)
Outdoor unit
connection piping kit
(For linking of outdoor
units)
*3: Downstream side when regarding the main piping as the start point
<Cooling,Heat pump type>
S
e
e l
t c
o i
n
f o
p
p i
e
s
z i
e
Gas side
Equivalent to
capacity
below 6.6
Ø12.7
6.6 to below 18.0
Ø15.9
18.0 to below 34.0
Ø22.2
34.0 to below 56.5
Ø28.6
56.5 to below 62.5
Ø28.6
62.5 to below 70.5
Ø34.9
70.5 to below 98.5
Ø34.9
98.5 or more
Ø41.3
C
a
p
a
i c
y t
a r
n
k
15m or less real length
Real length exceeds 15m
p
e
p
e
p
e
Total capacity code of indoor units
Equivalent to HP
Below 6.4
6.4 to below 14.2
14.2 to below 25.2
25.2 or more
Total capacity code of indoor units
Equivalent to HP
Below 14.2
For 4
branches
14.2 to below 25.2
Below 14.2
For 8
branches
14.2 to below 25.2
Total capacity code of outdoor units
Equivalent to HP
Below 26.0
26.0 or more
R
e
m
a
Pipe size differs
Liquid
based on the total
side
capacity code value
of indoor units at the
Ø9.5
downstream side.
If the total capacity
Ø9.5
code value of indoor
Ø12.7
units exceeds that
Ø15.9
of the outdoor units,
Ø19.1
apply the capacity
Ø19.1
code of the outdoor
units.
Ø19.1
Ø22.2
G
a
s
s
d i
e
Ø9.5
Ø12.7
Ø
1
2
7 .
Ø
1
5
9 .
Ø
2
2
2 .
Model name
Equivalent to
capacity
Below 18.0
RBM-BY55E
18.0 to below 40.0
RBM-BY105E
40.0 to below 70.5
RBM-BY205E
70.5 or more
RBM-BY305E
Model name
Equivalent to
capacity
Below 40.0
RBM-HY1043E
40.0 to below 70.5 RBM-HY2043E
Below 40.0
RBM-HY1083E
40.0 to below 70.5 RBM-HY2083E
*3
Model name
Equivalent to
capacity
Below 73.0
RBM-BT14E
73.0 or more
RBM-BT24E
9
k r
s
Liquid
side
Ø6.4
Ø6.4
Ø
6
4 .
Ø
9
5 .
Ø
1
2
7 .
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