04
Selection of pipe size
<144 to 240 type>
Outdoor unit
↓
Outdoor unit
connection piping kit
Outdoor unit
connecting pipe
Model
072 type
096 type
120 type
Balance pipe side
Ø3/8"
Ø3/8"
Ø3/8"
Suction gas side
Ø7/8"
Ø7/8"
Ø1-1/8"
Discharge gas side
Ø3/4"
Ø3/4"
Ø3/4"
Liquid side
Ø1/2"
Ø1/2"
Ø1/2"
No.
(1)
Title
Use part
Selection of pipe size
Outdoor unit
connection piping
Balance pipe
Outdoor unit capacity type
144 to 240 type
Balance pipe
Ø3/8"
(2)
Flow Selector unit
↓
Indoor unit
Indoor unit
connecting pipe
Indoor unit capacity type
007 to 012 type
015 to 018 type
021 to 048 type
Gas side
Ø3/8"
Ø1/2"
Ø5/8"
Liquid side
Ø1/4"
Ø1/4"
Ø3/8"
(5)
<072 to 120 type>
Outdoor unit
↓
First branching section
<144 to 240 type>
Outdoor unit
connection piping
kit of header unit
↓
First branching section
Main piping
Outdoor unit capacity type (kBtu)
072, 096 type
120 type
144 type
168, 192 type
216, 240 type
Suction gas side
Ø7/8"
Ø1-1/8"
Ø1-1/8"
Ø1-1/8"
Ø1-3/8"
Discharge gas side
Ø3/4"
Ø3/4"
Ø7/8"
Ø7/8"
Ø1-1/8"
Liquid side
Ø1/2"
Ø1/2"
Ø5/8"
Ø3/4"
Ø3/4"
(3)
Ø3/8"
Ø1/2"
Ø5/8"
Ø3/4"
Ø3/4"
Ø1/2"
Ø3/4"
Ø7/8"
Ø7/8"
Ø1-1/8"
Ø5/8"
Ø7/8"
Ø1-1/8"
Ø1-1/8"
Ø1-3/8"
Below 61
61 to below 116
116 to below 155
155 to below 193
193 or more
Branching section
↓
Branching section
Branching section
↓
Flow Selector unit
Flow Selector unit
↓
Branching section
Branching pipe
(*1)(*2)(*6)
Total capacity codes of indoor units
at downstream side (kBtu/h) (*6)
Suction gas side
Discharge gas side
Liquid side
(4)
Branching section
Y-shaped
branching joint
(*3)(*4)
Total capacity codes of indoor units (kBtu/h)
Model name
(7)
For 3 pipes
RBM-BY55FUL
RBM-BY105FUL
RBM-BY205FUL
For 2 pipes
RBM-BY55UL
RBM-BY105UL
RBM-BY205UL
Below 61
61 to below 136
136 or more
Terminal
branching section
↓
Indoor unit
Indoor unit
connecting pipe
Indoor unit capacity type
Gas side
Ø3/8"
Ø1/2"
Ø1/2"
Ø5/8"
Ø5/8"
Liquid side
Ø1/4"
Ø3/8"
Ø1/4"
Ø3/8"
Ø3/8"
(6)
007 to 012 type
Pipe length
(Actual length)
015 to 018 type
021 to 048 type
Pipe length
(Actual length)
49 ft or less
Over 49 ft
49 ft or less
Over 49 ft
Branching section
Branching
header
(*3)(*4)(*5)
Total capacity codes of indoor units (kBtu/h)
Model name
(8)
For 2 pipes
RBM-HY1043UL
RBM-HY2043UL
RBM-HY1083UL
RBM-HY2083UL
For 3 pipes
RBM-HY1043FUL
RBM-HY2043FUL
RBM-HY1083FUL
RBM-HY2083FUL
For 4 branching
For 8 branching
Below 136
136 or more
Below 136
136 or more
Below 38
38 to below 61
61 to 96 or less
5
8
8
RBM-Y0383FUL
RBM-Y0613FUL
RBM-Y0963FUL
Branching section
Outdoor unit
connection
piping kit
*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 flow selector unit and the dedicated cooling circuit.
*3: Select the branch pipe of the first 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: Up to a total of 54 (kBtu/h) maximum capacity code is connectable to one line after branching header.
When using a branching header for the 1st branch and the total capacity codes of all outdoor units are 120 type or more, use a
RBM-HY2043FUL or RBM-HY2083FUL regardless of the total capacity codes of indoor units at downstream side.
*6: The downstream starting point is the main pipe.
*7: Only group operation with one remote control (or two remote controls) is possible if one flow selector unit is connected to multiple indoor units.
Multiple outdoor units
(9)
Model name
RBM-BT14FUL
Flow Selector
unit (*7)
Total capacity codes of indoor units (kBtu/h)
Model name
(10)
Max. number of
connectable indoor units
