LG Styler S3RERB Service Engineering Manual page 47

Category
3. Vacuum
degasification
Pipe connection
Connect the red hose to the high pressure side and blue hose to the low pressure side.
Vacuum sequence
Open the valve and apply vacuum for 40 minutes, then close the valve.
Work sequence
1) After you complete the vacuum degasification, check the amount of refrigerant to be injected for the
model.
2) Use the vacuum pump to generate vacuum in the cylinder.
3) Measure the amount of refrigerant to be charged.
- Measure the weight of the cylinder in the vacuum state using the electronic scale.
- Charge the refrigerant to the cylinder and measure the weight.
4. Refrigerant
charging
4) After you complete the charging, use the pinch-off plier to pinch the charging pipe.
5) Weld the end of the pinched charging pipe with copper soldering and conduct gas leakage inspection on
the welding part.
5. Gas leakage test Use the electronic leakage detector on the parts where leakage may occur, including the welding part.
6. Arranging cycle Once the work is complete, check if the pipes are in their original position. Especially, maintain the distance
pipes of 10 mm between the pipes.
High pressure
- Conduct the vacuum degasification while you operate the compressor when you suck up the
refrigerant. (This way, refrigerant injection is easy and error-free.)
Indicate the weight of the empty cylinder.
Precautions
Key Point
Calculating the amount of refrigerant charged:
Refrigerant amount = Weight after charging - Weight
before charging (the cylinder weight)
Refrigerant: Material number RAC30248902 (refrigerant
amount: 160 g)
Key Point
- Perform the work at a location where the ambient temperature
is approx. 25 .
- In the winter, you may want to reduce the amount by 5 g and,
in the summer, increase the amount by 5 g.
47
Low pressure