LG LDN127HV4 Installation Manual page 10

THE INDOOR UNIT INSTALLATION
10
Plumbing materials and storage methods
Pipe must be able to obtain the specified thickness and should be used with low impurities.
Also when handling storage, pipe must be careful to prevent a fracture, deformity and wound.
Should not be mixed with contaminations such as dust, moisture.
Refrigerant piping on three principles
Drying
Should be no moisture
inside
Items
- Significant hydrolysis of
refrigerant oil
- Degradation of refrigerant
Cause oil
failure - Poor insulation of the
compressor
- Do not cold and warm
- Clogging of EEV, Capillary
- No moisture in the pipe
- Until the connection is
completed, the plumbing
pipe entrance should be
strictly controlled.
- Stop plumbing at rainy
day.
Counter-
- Pipe entrance should be
measure
taken side or bottom.
- When removal burr after
cutting pipe, pipe entrance
should be taken down.
- Pipe entrance should be
fitted cap when pass
through the walls.
Cleanliness
No dust inside.
Moisture
- Degradation of refrigerant
oil
- Poor insulation of the
compressor
- Do not cold and warm
- Clogging of EEV, Capillary
- No dust in the pipe.
- Until the connection is
completed, the plumbing
pipe entrance should be
strictly controlled.
- Pipe entrance should be
taken side or bottom.
- When removal burr after
cutting pipe, pipe entrance
should be taken down.
- Pipe entrance should be
fitted cap when pass
through the walls.
Airtight
There is no refrigerant
leakage
Dust
- Gas shortages
- Degradation of refrigerant
oil
- Poor insulation of the
compressor
- Do not cold and warm
- Airtightness test should
be.
- Brazing operations to com-
ply with standards.
- Flare to comply with stan-
dards.
- Flange connections to
comply with standards.
Leakage