Refrigerant Piping - Toshiba RBM-Y0611FUPUL Installation Manual

4

REFRIGERANT PIPING

If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fi re, noxious gas may be generated.
After the installation work, confi rm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and fl ows near a fi re source, such as a fan heater, cooking stove or heating
unit, noxious gas may be generated.
Permissible pipe length and permissible height difference
For piping dimensions, follow the Installation Manual attached to the outdoor unit.
REQUIREMENT
• When the refrigerant pipe is long, set the support brackets to fi x the pipe at intervals of 8.2 to 9.8 ft (2.5 to 3 m).
If the pipe is not fi xed, noise may be generated.
• Never bend pipes sticking out of the unit.
The connecting pipework must be supported, failure to do so may result in broken pipework within the unit.
Connection pipe size of Flow Selector unit (default)
RBM-***
HP/LP gas pipe
Y0611FUPUL Ø1/2" (Ø12.7)
Y0961FUPUL Ø3/4" (Ø19.1)
EN-13
01_1145017001-1 EN.indd 7 01_1145017001-1 EN.indd 7
WARNING
(Unit: in (mm))
Outdoor unit side Indoor unit side
(Upstream) (Downstream)
Suction gas pipe Gas pipe
Ø5/8" (Ø15.9) Ø5/8" (Ø15.9)
Ø7/8" (Ø22.2) Ø7/8" (Ø22.2)
HP: high pressure
LP: low pressure
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Pipe connecting process
Pipe connecting example
Outdoor Unit
Suction gas pipe
HP/LP gas pipe
(Liquid pipe)
It is unnecessary that connect liquid pipe to Flow Selector unit (Single-port type).
For piping dimensions, follow the Installation Manual attached to the outdoor unit.
• Connect the pipes.
HP: high pressure
LP: low pressure
HP/LP gas pipe
Suction gas pipe
* Be sure to wrap the pipe with wet cloth when applying brazing.
Wet cloth
Remove the cap.
Insert the connecting pipe.
• 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.
Flow Selector unit
(Single-port type)
Gas pipe
Indoor Unit
Gas pipe
CAUTION
Apply brazing to full circumference.
EN-14
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