16
Refrigerant pipe installation
Tightening are connection area
X Check that the aring is properly made.
X Align the center of the piping and suciently tighten the are nut with ngers. Finally, tighten the are nut with torque
wrench until the wrench clicks. When tightening the are nut with torque wrench, ensure the direction for tightening
follows the arrow on the wrench.
X Make sure to use ester oil to coat the are connection section.
Pipe
Flare nutFlare connection section
Outer diameter
[D, mm (inch)]
Connection torque
Flare dimension
[L, mm (inch)]
Flare shape [mm (inch)]
LHGtDN /tN
Ø6.35 (1/4) 140~180 14~18 8.70~9.10(0.343~0.358)
D
L
R 0.4~0.8
(0.016~0.032)
90° ±2°
45° ±2°
Ø9.52 (3/8) 350~430 34~42 12.80~13.20(0.504~0.520)
Ø12.70 (1/2) 500~620 49~61 16.20~16.60(0.638~0.654)
Ø15.88 (5/8) 690~830 68~82 19.30~19.70(0.760~0.776)
t Blowing Nitrogen gas should be done when brazing the pipe.
t Make sure to use the provided are nut.
t Make sure that there are no cracks on the bent pipe.
t Do not fasten the are nut with excessive strength.
t Use ester oil to coat the are connection area to prevent refrigerant leak. R410A is a high pressure refrigerant.
Therefore, there is a risk of refrigerant leakage if the are connection is not coated with ester oil.
CAUTION
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