Toshiba RBM-Y1801F4PE Installation Manual page 10

Piping dimensions
Outdoor unit
FS unit
(1)
Single Indoor unit connection
per one port
Outdoor unit
FS unit
(1)
Multi indoor unit connection
per one port
Outdoor unit side pipe size (1)
Total capacity codes of indoor units
at the downstream side
Equivalent to capacity Equivalent to HP
Below 18.0 Below 6.4
18.0 to below 34.0 6.4 to below 12.2
34.0 to below 45.5 12.2 to below 16.2
45.5 to below 56.5 16.2 to below 20.2
56.5 to below 70.5 20.2 to below 25.2
70.5 to below 98.5 25.2 to below 35.2
98.5 or more 35.2 or more
Indoor unit side pipe size (2)
Capacity rank Equivalent to HP
005 to 012 0.6 to 1.25
015 to 018 1.7 to 2.0
024 to 056 2.5 to 6.0
Indoor unit side pipe size (3)
Total capacity codes of indoor units at the
downstream side
Equivalent to capacity Equivalent to HP
Below 18.0 Below 6.4
Y-shaped branching joint (4)
Total capacity codes of indoor units at the
downstream side
Equivalent to capacity Equivalent to HP
Below 18.0 Below 6.4
▪ Connectable indoor units of 1 port : 18.0 kW or less and 10 units or less.
EN-17
(2)
Indoor unit
downstream
(3) (4) (3) (4) (2)
Indoor unit
(2) (2)
Outdoor unit side
(Upstream)
Suction gas pipe Discharge gas pipe
Ø15.9 Ø12.7
Ø22.2 Ø19.1
Ø28.6 Ø22.2
Ø28.6 Ø22.2
Ø34.9 Ø28.6
Ø34.9 Ø28.6
Ø41.3 Ø34.9
Length of piping Gas side
15 m or less real length Ø9.5
Exceeds 15 m real length Ø12.7
15 m or less real length Ø12.7
Exceeds 15 m real length Ø15.9
- Ø15.9
Pipe size
Gas pipe Liquid pipe
Ø15.9 Ø9.5
Y-shaped branching joint
Model name
RBM-BY55E
9
Pipe connecting process
• Connect the pipes.
• Use stopper-pipe (accessory) to the port to which indoor unit is not connected.
• Use attached-pipe (accessory) to connect the pipe with different diameter from the pipe to Flow Selector unit.
Discharge gas pipe
Suction gas pipe
Liquid pipe
Ø9.5
Ø12.7
Ø15.9
• Direction of connection of pipe to the outdoor unit can be selected according to the condition of installation place.
Ø19.1
In that case, please replace the stopper pipe.
Ø19.1
Ø22.2
Ø22.2 In case of piping
to right side
(default)
Liquid side
Stopper pipe
Ø6.4
In case of piping
Ø9.5
to left side
Ø6.4
Ø9.5
Ø9.5
* Be sure to wrap the pipe with wet cloth when applying brazing.
• For a brazing work of the refrigerant pipes, be sure to use nitrogen gas in order to prevent oxidation of the
inside of the pipes; otherwise clogging of the refrigerating cycle due to oxidized scale may occur.
* Remove all fl ux after brazing.
Liquid pipe
Attached pipe
(Accessory)
CAUTION
Wet cloth
Remove the cap.
Insert the connecting pipe.
Attached pipe
(Accessory)
Stopper pipe
Apply brazing to full circumference.
EN-18