LG Styler S3RERB - Page 46

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6-4-3. Precautions When Performing Major Repair
Category Precautions
1. Using tools Be sure to use the parts and tools that are designed for R134a.
2. Removing
the remaining
refrigerant
1) Remove the remaining refrigerant at least 5 minutes after you turn o the styler. (Otherwise, the Internal
oil may leak.)
2) When you remove the refrigerant, rst cut the high pressure side (dryer part) with the wire cutter and
then cut the low pressure side to drain the remaining refrigerant. (If you do this in the opposite order, large
amount of oil may leak. So, be sure to follow the cutting order.)
3. Replacing dryer Be sure to use the dryer for F134a when repairing the pipe or injecting the refrigerant.
4. Nitrogen
substitution
welding
To prevent oxidation scale from forming inside the pipe due to the welding heat, be sure to perform
nitrogen substitution at the specied nitrogen pressure while welding (nitrogen pressure: 0.1 - 0.2 kg/㎠).
5. Others
1) Be sure to use only the nitrogen gas or R134a refrigerant when you are cleaning up the inside of the cycle
pipe or relling it.
2) Be sure to conduct leakage inspection using the electronic leakage detector.
3) Be sure to use the pipe cutter when you cut the pipe.
4) Make sure that no water penetrates into the cycle.
6-4-4 Details of Major Repair
Category Precautions
1. Removing
the
remaining
refrigerant
Highpressure
Lowpressure
Important: Follow the order for removing the refrigerant.
(Otherwise, the compressor oil may leak.)
① Remove the remaining refrigerant at least 5 minutes after you turn off the styler.
(Otherwise, the Internal oil in the compressor may leak.)
② When you remove the refrigerant, rst cut the high pressure side (dryer part) with the wire cutter and
then cut the low pressure side to drain the remaining refrigerant slowly.
2. Welding
using
nitrogen
substitution
Important
If you perform welding without nitrogen substitution, oxidation scale may form inside the pipe and
deteriorate the performance and reliability of the product.
Replacing dryer
Assemble the dryer and conduct welding while blowing nitrogen gas (0.1 - 0.2 kg/) to the high pressure
side.
Replacing compressor
Conduct welding while blowing nitrogen gas to the low pressure side.
Note) Possibility of oxidation scale forming in other parts is very low due to the short welding time. So, the
nitrogen substitution is not necessary in those parts.