o the outdoor unit or
next branch pipe
Input
Output (2)
To next branch pipe
or indoor unit
11.18.2.2 Installation precaution
Position the branch pipe on the appropriate horizontal and vertical plane so that branch flow is even.
Horizontal
line
Horizontal line
(Within a 30° incline)
Within 30°
15°
11.18.2.3 Precautions at connecting points
After removing any impurities at the mouth of the pipe or the connecting points, be sure to clean the inside of the pipe
with nitrogen gas (nitrogen displacement) to prevent oxide scale forming on the inner surface of the pipe. This step is
extremely important when making the connections in the refrigerant piping. (Do not use an antioxidant)
• If the size of the selected refrigerant pipe and the size of the branch pipe differ, cut the connecting section with
pipe cutters per the illustration below.
(Be sure to deburr and remove any impurities on the cutting surface.)
Installation on a
vertical plane is also
possible
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