Samsung AM MXVAFC Series, Installation Manual

Page: 49 / 98

49
ENGLISH
5 . Check that you flared the pipe correctly .
f f Refer to below illustrations for correct and incorrect examples of flared pipe .
Uneven Thickness Cracked Damaged Surface Inclined Correct
• If foreign matters or burrs are not removed after cutting pipe, refrigerant gas may leak .
• If foreign matters enter inside the pipe, important interior parts of the unit may get damaged or product
efficiency will be reduced . So, the direction of pipe should be downward during pipe cutting or flaring .
CAUTION
Connecting the flared pipes
f f Check if the flaring is properly done according to the standard size .
f f Align the center of the piping and tighten the flare nut with your hands . Then, tighten the flare nut with torque wrench in
a direction of the arrow indicated in below illustration .
f f Make sure to use ester oil to coat the flare connection section .
Flare connection section Flare nut
Pipe
Monkey wrench
Torque wrench
Outer diameter (D) Torque Flare dimension (L)
Flare shape [mm(inch)]
mm inch N·m lbf·ft mm inch
6 .35 1/4 14 ~ 18 10 .3 ~ 13 .3 8 .7 ~ 9 .1 0 .34 ~ 0 .36
D
L
90° ±2°
45° ±2°
R 0 .4~0 .8
(0 .016~0 .032)
9 .52 3/8 34 ~ 42 25 .1 ~ 31 .0 12 .8 ~ 13 .2 0 .50 ~ 0 .52
12 .7 1/2 49 ~ 61 36 .1 ~ 45 .0 16 .2 ~ 16 .6 0 .64 ~ 0 .65
15 .88 5/8 68 ~ 82 50 .2 ~ 60 .5 19 .3 ~ 19 .7 0 .76 ~ 0 .78
• Blowing Nitrogen gas should be done when welding the pipe .
• Make sure to use the provided flare nut .
• Make sure that there are no cracks or twisted part when you need to bend the pipe .
• Do not fasten the flare nut with excessive strength .
• R-410A is a high pressure refrigerant and there is a risk of refrigerant leakage if the flare connection is not coated
with ester oil . Therefore, apply ester oil to coat the flare connection area .
CAUTION