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Toshiba
Flare connecting procedure and precautions
1) Make sure that the flare and connecting portions do not have any flaw and dust.
2) Correctly align the flared surface and the connecting axis.
3) Tighten the flare with designated torque by means of a torque wrench. The tightening torque for R410A is
the same as that for the conventional R22. If the torque is weak, gas leakage may occur. If it is too strong,
the flare nut may crack and may be made non-removable. When choosing the tightening toque, comply
with values designated by products. Table 2-2-5 shows reference values.
NOTE
When applying oil to the flare surface, be sure to use oil designated by the product. Using any other oil deteriorates
the lubricating oil, possibly causing the compressor to burn out.
Table 2-2-5 Tightening torque of flare for R410A (Reference values)
Nominal diameter Outer diameter (mm) Tightening torque N•m (kgf•m)
3/8 9.52 33 to 42 (3.3 to 14.2)
5/8 15.9 66 to 82 (6.8 to 8.2)
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 9 Monday, October 5, 2009 2:09 PM