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No. Piping parts Name Selection of pipe size Remarks
(1)
Outdoor unit
Ô
Outdoor unit
connection piping
kit
Outdoor unit
connecting pipe
Connecting pipe size of outdoor unit
Type Gas side Liquid side
MMY-MAP0806* Ø19.1 Ø12.7
MMY-MAP1006* Ø22.2 Ø12.7
MMY-MAP1206* Ø28.6 Ø12.7
MMY-MAP1406* Ø28.6 Ø15.9
MMY-MAP1606* Ø28.6 Ø15.9
MMY-MAP1806* Ø28.6 Ø15.9
MMY-MAP2006* Ø28.6 Ø15.9
MMY-MAP2206* Ø28.6 Ø19.1
Same as connecting
pipe size of the
outdoor unit.
(2)
Between Outdoor
unit connection
piping kits
Main connecting
piping between
outdoor units
Piping size for connecting piping between outdoor units
Total capacity codes of the total
outdoor units at the downstream
side
Gas
side
Liquid
side
Balance
pipe
Equivalent
to HP
Equivalent
to capacity
16 to below 22 45.0 to below 61.5 Ø28.6 Ø15.9
Ø9.5
22 to below 24 61.5 to below 67.0 Ø28.6 Ø19.1
24 to below 26 67.0 to below 73.0 Ø34.9 Ø19.1
26 to below 36 73.0 to below 100.0 Ø34.9 Ø19.1
36 or more 100.0 or more Ø41.3 Ø22.2
Pipe size differ
based on the total
capacity code value
of outdoor unit at the
downstream side.
(3)
Outdoor unit
connection piping
kit of header unit
Ô
First branching
section
Main piping
Size of main piping
Total capacity codes of
all outdoor units
Gas side
Liquid
side
Equivalent to HP
Equivalent to
capacity
8 to below 10 22.4 to below 28.0 Ø19.1 Ø12.7
10 to below 12 28.0 to below 33.5 Ø22.2 Ø12.7
12 to below 14 33.5 to below 38.4 Ø28.6 Ø12.7
14 to below 22 38.4 to below 61.5 Ø28.6 Ø15.9
22 to below 24 61.5 to below 67.0 Ø28.6 Ø19.1
24 to below 26 67.0 to below 73.0 Ø34.9 Ø19.1
26 to below 36 73.0 to below 100.0 Ø34.9 Ø19.1
36 or more 100.0 or more Ø41.3 Ø22.2
Pipe size differ
based on all capacity
code value of
outdoor unit.
(4)
Branching section
Ô
Branching section
Branching pipe
Pipe size between branching sections
Total capacity codes of
indoor units at downstream side
Gas side
Liquid
side
Equivalent to HP
Equivalent to
capacity
below 2.4 below 6.6 Ø12.7 Ø9.5
2.4 to below 6.4 6.6 to below 18.0 Ø15.9 Ø9.5
6.4 to below 12.2 18.0 to below 34.0 Ø22.2 Ø12.7
12.2 to below 20.2 34.0 to below 56.5 Ø28.6 Ø15.9
20.2 to below 22.4 56.5 to below 62.5 Ø28.6 Ø19.1
22.4 to below 25.2 62.5 to below 70.5 Ø34.9 Ø19.1
25.2 to below 35.2 70.5 to below 98.5 Ø34.9 Ø19.1
35.2 or more 98.5 or more Ø41.3 Ø22.2
Pipe size differs
based on the total
capacity code value
of indoor units at the
downstream side.
If the total capacity
code value of indoor
units exceeds that
of the outdoor units,
apply the capacity
code of the outdoor
units.
No. Piping parts Name Selection of pipe size Remarks
(5)
Branching section
Ô
Indoor unit
Indoor unit
connecting pipe
Connecting pipe size of indoor unit
Capacity rank Gas side
Liquid
side
005 to 012 type
15m or less real length Ø9.5 Ø6.4
Real length exceeds 15m Ø12.7 Ø6.4
015 to 018 type Ø12.7 Ø6.4
024 to 056 type Ø15.9 Ø9.5
072 to 096 type Ø22.2 Ø12.7
(6)
Branching section
Y-shaped
branching joint
Selection of branching section (Y-shaped branching joint)
Total capacity code of indoor units
Model name
Equivalent to HP
Equivalent to
capacity
Y-shape
branching joint
Below 6.4 Below 18.0 RBM-BY55E
6.4 to below 14.2 18.0 to below 40.0 RBM-BY105E
14.2 to below 25.2 40.0 to below 70.5 RBM-BY205E
25.2 or more 70.5 or more RBM-BY305E
(7)
Branching section Branching header
Selection of branching section (Branching header)
Total capacity code of indoor units
Model name
Equivalent to HP
Equivalent to
capacity
*2
Branching header
For 4
branches
Below 14.2 Below 40.0 RBM-HY1043E
14.2 to below 25.2 40.0 to below 70.5 RBM-HY2043E
For 8
branches
Below 14.2 Below 40.0 RBM-HY1083E
14.2 to below 25.2 40.0 to below 70.5 RBM-HY2083E
*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).
(8)
Branching section
Outdoor unit
connection piping
kit (For linking of
outdoor units)
Outdoor unit connection piping kit (For linking of outdoor units)
Total capacity code of outdoor units
*3
Model name
Equivalent to HP
Equivalent to
capacity
Outdoor unit
connection piping kit
(For linking of outdoor
units)
Below 26.0 Below 73.0 RBM-BT14E
26.0 or more Above 73.0 RBM-BT24E
*3: Downstream side when regarding the main piping as the start point
1117101201-3 EN.indd 641117101201-3 EN.indd 64 8/8/2559 BE 3:49 PM8/8/2559 BE 3:49 PM
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