Installation Precaution - Panasonic S-22KA1E5S Service Manual

11.4.2.1 Installation instructions
11.4.2.2

Installation precaution

Position the branch pipe on the appropriate horizontal and vertical plane so that branch flow is even.
11.4.2.3 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 on-site 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.)
Refrigerant pipe
To the outdoor unit or
Input
next branch pipe
Horizontal
line
Horizontal line
Output (1) To next branch pipe
or indoor unit
Output (2)
pipe
Refrigerant
Gas side / Liquid side
branch pipe
15°
(Within a 30° incline)
104
Within 30°