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Refrigerant pipe installation
Tightening flare connection area
X Check that the flaring is properly made .
X
X Align the center of the piping and sufficiently tighten the flare nut with fingers . Finally, tighten the flare nut with torque
X
wrench until the wrench clicks . When tightening the flare 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 flare connection section .
X
Flare connection section
Outer diameter
[D, mm (inch)]
Ø6.35 (1/4)
Ø9.52 (3/8)
Ø12.70 (1/2)
Ø15.88 (5/8)
• Blowing Nitrogen gas should be done when brazing the pipe .
• Make sure to use the provided flare nut .
CAUTION
• Make sure that there are no cracks on the bent pipe .
• Do not fasten the flare nut with excessive strength .
• Use ester oil to coat the flare connection area to prevent refrigerant leak . R410A is a high pressure refrigerant .
Therefore, there is a risk of refrigerant leakage if the flare connection is not coated with ester oil .
16
Pipe
Flare nut
Connection torque
kgf•cm
N•m
140~180
14~18
350~430
34~42
500~620
49~61
690~830
68~82
Flare dimension
[L, mm (inch)]
8 . 7 0~9 . 1 0(0 . 3 43~0 . 3 58)
12 . 8 0~13 . 2 0(0 . 5 04~0 . 5 20)
16 . 2 0~16 . 6 0(0 . 6 38~0 . 6 54)
19 . 3 0~19 . 7 0(0 . 7 60~0 . 7 76)
Flare shape [mm (inch)]
R 0 . 4 ~0 . 8
(0 . 0 16~0 . 0 32)
D
L
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