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Idiomas disponibles
(6) Indoor unit connecting pipe (*9)
Indoor unit capacity type
Liquid side
1/4 in.
(6.4 mm)
007 to 012 type
3/8 in.
(9.6 mm)
1/4 in.
(6.4 mm)
015, 018 type
3/8 in.
(9.6 mm)
3/8 in.
021 to 054 type
(9.6 mm)
1/2 in.
072, 096 type
(12.7 mm)
(7) Y-shaped branching joint (*4) (*5)
Total capacity code of indoor
units
For 3 piping
Below 61
RBM-BY55FUL
61 to below 136
RBM-BY105FUL
136 to below 241
RBM-BY205FUL
241 or more
RBM-BY305FUL
(8) Branching header (*4) (*5) (*6) (*7)
Number of
Total capacity code of indoor
branches
units
Below 136
For 4 branching
136 to below 241
Below 136
For 8 branching
136 to below 241
(9) Flow selector unit (*12)
Total capacity code of indoor
Port type
units
Below 61
Single port
61 to 96 or less
Below 244 (1 branch: below 61)
Multi port
Below 290 (1 branch: below 61)
Below 290 (1 branch: below 61)
27-EN
Real liquid side
Gas side
piping length
3/8 in.
49 ft (15 m) or less
(9.6 mm)
1/2 in.
Exceeds 49 ft (15 m)
(12.7 mm)
1/2 in.
49 ft (15 m) or less
(12.7 mm)
5/8 in.
Exceeds 49 ft (15 m)
(15.9 mm)
5/8 in.
(15.9 mm)
7/8 in.
(22.2 mm)
Model name
For 2 piping
RBM-BY55UL
RBM-BY105UL
RBM-BY205UL
RBM-BY305UL
Model name
For 3 piping
For 2 piping
RBM-HY1043FUL
RBM-HY1043UL
RBM-HY2043FUL
RBM-HY2043UL
RBM-HY1083FUL
RBM-HY1083UL
RBM-HY2083FUL
RBM-HY2083UL
Model name
Number of branches
RBM-Y0611FUPUL
-
RBM-Y0961FUPUL
-
RBM-Y0611FU4PUL
4
RBM-Y0611FU8PUL
8
RBM-Y0611FU12PUL
12
(*1) : The downstream starting point is the main pipe.
(*2) : Main pipe should be selected based on the capacity type of the outdoor unit.
(*3) : When making the liquid pipe of the main pipe a refrigerant saving size, make height difference between indoor units
smaller than 49 ft (15 m). In addition, the farthest real length pipe is also limited.
(*4) : The branch pipe of the fi rst branch should be selected based on the capacity type of the outdoor unit.
(*5) : Select according to the outdoor unit capacity code if the total of the indoor capacity codes exceeds the outdoor unit
capacity code.
(*6) : When a branch header is used for the fi rst branching of an outdoor unit with a capacity type of 120 (kBtu/h) or more
and 241 (kBtu/h) or less, use RBM-HY2043FUL (4 branches) and RBM-HY2083FUL (8 branches) regardless of the
total capacity code of the downstream indoor units. In addition,for outdoor units of 264 type or larger, the branching
header cannot be used as the fi rst branch.
(*7) : It is possible to select up to a maximum capacity code total 58 for each one branch of the branching header.
(*8) : Use the same size as the main pipe if it is larger than the main pipe.
(*9) : Since the liquid side pipe is not connected to the single port type FS unit, the pipe length is longer than the suction
side gas pipe.
(*10) : 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.
(*11) : If the pipe size is 3/4 in. or more, use a suitable material as detailed in the Installation Manual.
(*12) : Please contact our sales representative when merging downstream piping of multi port type.
■
Allowable length of refrigerant pipes and allowable height difference
between units (Heat pump)
◆ System restriction
Outdoor unit combination
Max. capacity of outdoor units
Max. number of indoor unit
connections
Indoor unit connection rate
H2 ≤ 49 ft (15 m)
(Varies depending on the
height difference between
H2 > 49 ft (15 m)
indoor units.)
(1*): If it exceeds 135%, there is a limit to the maximum number of indoor units that can be connected.
– 14 –
3 unit
504 kBtu/h (42 ton)
75 units
Single outdoor unit system : 200% of outdoor units' capacity (*1)
Multiple outdoor units system : 135% of outdoor units' capacity
105% of outdoor units' capacity
EN
EN
ID
28-EN
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