Toshiba Carrier RBM-Y0611F4PUL Installation Manual page 10

Piping dimensions
They vary depending on the outdoor unit. For details, refer to the Installation Manual attached to the outdoor unit.
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
Suction gas pipe
Below 61 Ø5/8"
61 to below 115.5 Ø7/8"
115.5 to below 153.5 Ø1-1/8"
153.5 to below 191.5 Ø1-1/8"
191.5 to below 239 Ø1-3/8"
239 to below 334 Ø1-3/8"
334 or more Ø1-5/8"
Indoor unit side pipe size (2)
Indoor unit capacity type
49ft (15m) or less real length
007 to 012
Exceeds 49ft (15m) real length
49ft (15m) or less real length
015 to 018
Exceeds 49ft (15m) real length
021 to 054
Indoor unit side pipe size (3)
Total capacity codes of indoor units
at the downstream side
Gas pipe
Below 61 Ø5/8"
Y-shaped branching joint (4)
Total capacity codes of indoor units at
Y-shaped branching joint Model name
the downstream side
Below 61
EN-17
(2)
Indoor unit
downstream
(4)
(3) (3) (4) (2)
Indoor unit
(2) (2)
Pipe size
Discharge gas pipe Liquid pipe
Ø1/2" Ø3/8"
Ø3/4" Ø1/2"
Ø7/8" Ø5/8"
Ø7/8" Ø3/4"
Ø1-1/8" Ø3/4"
Ø1-1/8" Ø7/8"
Ø1-3/8" Ø7/8"
Length of piping Gas side
Ø3/8"
Ø1/2"
Ø1/2"
Ø5/8"
- Ø5/8"
Pipe size
Liquid pipe
Ø3/8"
RBM-BY55UL
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
• Direction of connection of pipe to the outdoor unit can be selected according to the condition of installation place.
In that case, please replace the stopper pipe.
In case of piping
to right side
(default)
Liquid side
Stopper pipe
Ø1/4"
In case of piping
Ø3/8"
to left side
Ø1/4"
Ø3/8"
Ø3/8"
* 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