LG Multi F A2UW14GFA0 Engineering Product Data Book page 301

2. Guideline for each installation process
2.2 Refrigerant piping work
2.2.1 Principles of refrigerant piping
The " principles of refrigerant piping " must be strictly observed.
Cause of problem
-Rainwater, work water, etc
gets into pipes from outside
Dry
-Moisture generated inside pipe
due to condensation
-Formation of oxides inside
pipes during soldering
Clean
-Dirt,dust or other extraneous
material gets into pipes from outside
-Leak from soldered area
Air tight -Leak from flared area
-Leak from flange area
• The end of all copper pipes should be capped to protect them from dust or water particles while safe keeping
Dry
Make sure there is no moisture inside
the pipes
Moisture
Flushing
Replace Nitrogen
Flushing
Use the proper materials
Adhere strictly to standard soldering work practice.
Adhere strictly to standard flaring work practice.
Adhere strictly to standard flaring connection work practice.
The 3 princples of refrigerant piping work
Clean
Make sure there is no dirt inside the
pipes
Action to avoid problem
Pipe covering Vacuum drying
Pipe covering
Pipe covering
Make sure the refrigerant does not
leak out.
Dirt
Heat pump 50Hz/R410A
Air tight
Leak
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