Samsung AM220JXVAJH/AZ User Manual download pdf (Page 42)

ENGLISH

5. Check that you ared the pipe correctly.

 Refer to below illustrations for correct and incorrect examples of ared pipe.

Uneven ThicknessCrackedDamaged SurfaceInclinedCorrect

• 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

eciency will be reduced. So, the direction of pipe should be downward during pipe cutting or aring.

CAUTION

Connecting the ared pipes

 Check if the aring is properly done according to the standard size.

 Align the center of the piping and tighten the are nut with your hands. Then, tighten the are nut with torque wrench in

a direction of the arrow indicated in below illustration.

 Make sure to use ester oil to coat the are connection section.

Flare connection section Flare nut

Pipe

Monkey wrench

Torque wrench

Outer diameter Torque Flare dimension

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

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 are nut.

• Make sure that there are no cracks or twisted part when you need to bend the pipe.

• Do not fasten the are nut with excessive strength.

• R-410A is a high pressure refrigerant and there is a risk of refrigerant leakage if the are connection is not coated

with ester oil. Therefore, apply ester oil to coat the are connection area.

CAUTION

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Samsung AM220JXVAJH/AZ User Manual Page 42