Separation Tube Connection; Flare Connection (Pipe Connection) - Fujitsu AOU48RLXFZ1 Installation Manual

51 21

Separation tube connection

• Use genuine separation tubes for the refrigerant piping branches. Separation tubes may be used for piping
between the outdoor unit and branch box.
• Select number of separation tubes and purchase it before starting the installation work.
• Any vertical piping shall be in the part of the main piping. If a main pipe is bent, keep the straight part more than 10 times
the diameter of the connected pipe. A variance in the amount of refrigerant may be caused if the straight part is short.
• For details, refer to the Installation Manual of separation tubes.
Separation tube
Horizontal
A
±15°
OK
A : Outdoor unit or Separation tube
B : Branch box or Separation tube
Liquid pipe
51 31

Flare connection (pipe connection)

• Do not use mineral oil on a flared part. Prevent mineral oil from getting into the system as this would reduce the
lifetime of the units.
• While welding the pipes, be sure to blow dry nitrogen gas through them.
• The maximum lengths of this product are shown in the table. If the units are further apart than this, correct
operation cannot be guaranteed.
En-14
A
B
Vertical
Horizontal
line
B
CAUTION
CAUTION
B
or
A
Name and shape
Gas pipe
CAUTION
NO GOOD