132-EN
131-EN
– 66 –
No.
Title
Use part
Selection of pipe size
Remarks
(6)
Indoor unit
connecting pipe
Terminal
branching section
Ô
Indoor unit
Capacity rank
Equivalent to
HP
Length of piping
Gas side
Liquid side
005 to 012
0.6 to 1.25
15 m or less real length
Ø9.5
Ø6.4
Exceeds 15 m real length
Ø12.7
Ø9.5
015 to 018
1.7 to 2.0
15 m or less real length
Ø12.7
Ø6.4
Exceeds 15 m real length
Ø15.9
Ø9.5
024 to 056
2.5 to 6.0
-
Ø15.9
Ø9.5
072 to 096
8.0 to 10.0
-
Ø22.2
Ø12.7
(7)
Y-shaped
branching joint
*3, *4
Branching section
Total capacity code of indoor units
Model name
Equivalent to capacity
Equivalent to HP
For 3 piping
For 2 piping
Below 18.0
Below 6.4
RBM-BY55FE
RBM-BY55E
18.0 to below 40.0
6.4 to below 14.2
RBM-BY105FE
RBM-BY105E
40.0 to below 70.5
14.2 to below 25.2
RBM-BY205FE
RBM-BY205E
70.5 or more
25.2 or more
RBM-BY305FE
RBM-BY305E
(8)
Branching
header
*3, *4, *5
Branching section
Total capacity code of indoor units
Model name
Equivalent to
capacity
Equivalent to HP
For 3 piping
For 2 piping
For 4
branches
Below 40.0
Below 14.2
RBM-HY1043FE
RBM-HY1043E
40.0 to below 70.5
14.2 to below 25.2
RBM-HY2043FE
RBM-HY2043E
For 8
branches
Below 40.0
Below 14.2
RBM-HY1083FE
RBM-HY1083E
40.0 to below 70.5
14.2 to below 25.2
RBM-HY2083FE
RBM-HY2083E
(9)
Outdoor unit
connection
piping kit
*6
Branching section
Total capacity codes of outdoor units at the downstream side
Model name
Equivalent to
capacity
Equivalent to HP
Below 73.0
Below 26.0
RBM-BT14FE
73.0 or more
26.0 or more
RBM-BT24FE
(10)
Flow Selector
unit
*7
Flow Selector unit
Ô
Indoor unit
Single port type
Total capacity codes of connected indoor units
Model name
Equivalent to
capacity
Equivalent to HP
Max. No. of
connected indoor
unit
Below 11.2
Below 4.0
Below 5
RBM-Y1123FE
✽
11.2 to below 18.0
4.0 to below 6.4
Below 10
RBM-Y1803FE
✽
18.0 to 28.0 or less
6.4 to below 10.0
Below 10
RBM-Y2803FE
✽
Multi port type
Equivalent to
capacity
Equivalent
to HP
Max No. of
connected indoor
unit in a branch
No. of
branch
Model name
Below 18.0
Below 6.4
10
4
RBM-Y1801F4PE*
6
RBM-Y1801F6PE*
*1: Use the same size as the main pipe if it is larger than the main pipe.
*2: Use a suction gas pipe and a liquid pipe for the two pipes branching downstream from the
fl
ow selector unit and the dedicated cooling circuit.
*3: Select the branch pipe of the
fi
rst branch according to the outdoor capacity code.
*4: Select according to the outdoor unit capacity code if the total of the indoor capacity codes exceeds the outdoor unit capacity code.
*5: It is possible to select up to a maximum capacity code total AP056 (6 hp) for the
fi
rst circuit after the header branch.
When using a branch header for the
fi
rst branch with an outdoor unit capacity code of 33.5 (12 hp equivalent) or more and 73.0 (26 hp equivalent) or less,
use RBM-HY2043FE (4 branches) and RBM-HY2083FE (8 branches) regardless of the total value of the capacity codes of the downstream indoor units.
And, a branch header cannot be used as the
fi
rst branch if the performance rank is over 73.0 (26 hp equivalent).
*6: The downstream starting point is the main pipe.
*7: If the performance rank is over 117.5 (42HP equivalent), “Flow Selector unit” is available for only Multi port type.
Selection of pipe size
No.
Title
Use part
Selection of pipe size
Remarks
(1)
Outdoor unit
connecting pipe
Outdoor unit
Ô
Outdoor unit
connection
piping kit
Type
Balance pipe
side
Suction gas
side
Discharge
gas side
Liquid side
MMY-MAP0806*
Ø9.5
Ø22.2
Ø19.1
Ø12.7
MMY-MAP1006*
Ø9.5
Ø22.2
Ø19.1
Ø12.7
MMY-MAP1206*
Ø9.5
Ø28.6
Ø19.1
Ø12.7
MMY-MAP1406*
Ø9.5
Ø28.6
Ø22.2
Ø15.9
MMY-MAP1606*
Ø9.5
Ø28.6
Ø22.2
Ø19.1
MMY-MAP1806*
Ø9.5
Ø28.6
Ø22.2
Ø19.1
MMY-MAP2006*
Ø9.5
Ø28.6
Ø22.2
Ø19.1
(2)
Between
Outdoor unit
connection
piping
*6
Outdoor unit
connection
piping kit
Ô
Outdoor unit
connection
piping kit
Total capacity codes of outdoor units at the
downstream side
Suction
gas side
Discharge
gas side
Liquid side
Equivalent to capacity
Equivalent to HP
45.0 to below 61.5
16 to below 22
Ø28.6
Ø22.2
Ø15.9
61.5 to below 73.0
22 to below 26
Ø34.9
Ø28.6
Ø19.1
73.0 to below 101.0
26 to below 36
Ø34.9
Ø28.6
Ø19.1
101.0 or more
36 or more
Ø41.3
Ø28.6
Ø22.2
(3)
Main piping
Outdoor unit
connection piping
kit of header unit
Ô
First branching
section
Total capacity codes of all
outdoor units
Suction
gas
side
Discharge
gas side
Liquid
side
Equivalent to
capacity
Equivalent to HP
22.4 to below 33.5
8 to below 12
Ø22.2
Ø19.1
Ø12.7
33.5 to below 38.4
12 to below 14
Ø28.6
Ø19.1
Ø12.7
38.4 to below 45.0
14 to below 16
Ø28.6
Ø22.2
Ø15.9
45.0 to below 61.5
16 to below 22
Ø28.6
Ø22.2
Ø19.1
61.5 to below 73.0
22 to below 26
Ø34.9
Ø28.6
Ø19.1
73.0 to below 101.0
26 to below 36
Ø34.9
Ø28.6
Ø22.2
101.0 or more
36 or more
Ø41.3
Ø34.9
Ø22.2
Pipe size differs
based on the total
capacity codes of
all outdoor units
(See Table 2.)
(4)
Branching pipe
*1, *2, *6
Branching section
Ô
Branching section
Branching section
Ô
Flow Selector unit
Flow Selector unit
Ô
Branching section
Total capacity codes of indoor
units at the downstream side
Suction
gas
side
Discharge
gas side
Liquid
side
Equivalent to
capacity
Equivalent to HP
Below 18
Below 6.4
Ø15.9
Ø12.7
Ø9.5
18 to below 34
6.4 to below 12.2
Ø22.2
Ø19.1
Ø12.7
34 to below 45.5
12.2 to below 16.2
Ø28.6
Ø22.2
Ø15.9
45.5 to below 56.5
16.2 to below 20.2
Ø28.6
Ø22.2
Ø19.1
56.5 to below 70.5
20.2 to below 25.2
Ø34.9
Ø28.6
Ø19.1
70.5 to below 98.5
25.2 to below 35.2
Ø34.9
Ø28.6
Ø22.2
98.5 or more
35.2 or more
Ø41.3
Ø34.9
Ø22.2
Pipe size differs
based on the total
capacity code
value of indoor
units at the
downstream side.
(See Table 1
and 2.)
(5)
Indoor unit
connecting pipe
Flow Selector unit
Ô
Indoor unit
Capacity rank
Equivalent to HP
Gas side
Liquid side
005 to 012
0.8 to 1.25
Ø9.5
Ø6.4
015 to 018
1.7 to 2.0
Ø12.7
Ø6.4
024 to 056
2.5 to 6.0
Ø15.9
Ø9.5
072 to 096
8.0 to 10.0
Ø22.2
Ø12.7
1117701001-EN.indd 66
1117701001-EN.indd 66
2/26/2559 BE 11:48 AM
2/26/2559 BE 11:48 AM
