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Attention item for piping connection
• To connect a pipe to or remove it from the connection kit, do use pliers for screws and torque spanner;
• When installing the connection kit, please x the box and connecting pipes in an efcient way to avoid shaking
when changing connection kit.
• For the sizes of the ares, please refer to <Table-1>.
<Note>
• For connection at a are, apply ester or ether oil to the are (both inner surface and outer surface). Apply such
oil for 3 to 4 times and insert the screw in the rst use
• The tightening torque for the are is given in <Table-1>.
If no torque wrench is available, act as the follows.
Use a spanner to tighten the nut of the are to a position where the tightening torque sharply increases.
The tightening angle for the position where the tightening torque sharply increases <Table -2>.
After the work, make sure there is no air leakage.
Tube size Tightening torque (N.m) Machined are size A (mm) Flare shape
Ø6.35 14.2~17.2 8.7~9.1
R0.4
A
90°
Ø9.52 32.7~39.9 12.8~13.2
Ø12.7 49.5~60.3 16.2~16.6
Ø15.88 61.8~75.4 19.3~19.7
Ø19.05 97.2~118.8 23.7—23.9
<Table-1>
Piping maintenance
During installation, provide maintenance as specied in the table in order to prevent water, foreign matter and dust
from entering the pipes.
Location Work period Maintenance method
Outdoors
More than 1 month Screw
Less than 1 month
Screw or strap
Indoors ——
Note
Particularly when a pipe is to penetrate through a wall or extend to outdoors, make sure foreign matter and dust
etc cannot enter the pipe.
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