CAUTION
• Keep the piping length at a minimum to minimize
the additional refrigerant charge due to piping
extension. (Maximum allowable piping length:
15 m)
• When connecting the pipes, make sure that
surrounding objects do not interfere with or
contact them to prevent refrigerant leakage due
to physical damage.
• Make sure that the spaces where the refrigerant
pipes are installed comply with national gas
regulations.
• Be sure to perform works such as additional
refrigerant charging and pipe welding under the
conditions of good ventilation.
• Be sure to perform welding and piping works for
mechanical connections under the conditions that
the refrigerant does not circulate.
• When reconnecting the pipes, make sure
to perform flared-jointing newly to prevent
refrigerant leakage.
• When working on the refrigerant pipes and the
flexible refrigerant connectors, be careful that
they are not damaged physically by surrounding
objects.
• If you need a pipe longer than specified in piping
codes and standards, you must add refrigerant to
the pipe. Otherwise, the indoor unit may freeze.
• While removing burrs, put the pipe face down to
make sure that the burrs do not get in to the pipe.
Outer diameter (mm) Torque (N•m) Torque (kgf•cm)
ø 6.35 14 to 18 140 to 180
ø 9.52 34 to 42 350 to 430
ø 12.70 49 to 61 500 to 620
ø 15.88 68 to 82 690 to 830
(Unit: mm)
Outer diameter (D) Depth (A) Flare dimension (L)
ø 6.35 1.3 8.7 to 9.1
ø 9.52 1.8 12.8 to 13.2
ø 12.70 2.0 16.2 to 16.6
ø 15.88 2.2 19.3 to 19.7
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