16
Refrigerant pipe installation
Tightening flare connection area
X
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
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
X
Make sure to use ester oil to coat the flare connection section .
Pipe
Flare nut
Flare connection section
Outer diameter
[D, mm (inch)]
Connection torque
Flare dimension
[L, mm (inch)]
Flare shape [mm (inch)]
kgf•cm
N•m
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)
• Blowing Nitrogen gas should be done when brazing the pipe .
• Make sure to use the provided flare nut .
• 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 .
CAUTION
DVM S Eco_IM_03408A-05_EN.indd 16
2016-11-11 오후 1:27:50
