LG GP-W500B6C, Installation Manual

Page: 33 / 91

PIPE CONNECTIONS BETWEEN INDOOR/OUTDOOR UNITS
ENGLISH
33
Refrigerant piping on three principles
Drying Cleanliness Airtight
Should be no moisture inside No dust inside. There is no refrigerant leakage
Items
Moisture Dust
Leakage
Cause fail-
ure
- Significant hydrolysis of
refrigerant oil
- Degradation of refrigerant
oil
- Poor insula’tion of the com-
pressor
- Do not cold and warm
- Clogging of EEV, Capillary
- Degradation of refrigerant
oil
- Poor insulation of the com-
pressor
- Do not cold and warm
- Clogging of EEV, Capillary
- Gas shortages
- Degradation of refrigerant
oil
- Poor insulation of the com-
pressor
- Do not cold and warm
Counter-
measure
- No moisture in the pipe
- Until the connection is com-
pleted, the plumbing pipe
entrance should be strictly
controlled.
- Stop plumbing at rainy day.
- Pipe entrance should be
taken side or bottom.
- When removal burr after cutting
pipe, pipe entrance should be
taken down.
- Pipe entrance should be fit-
ted cap when pass through
the walls.
- No dust in the pipe.
- Until the connection is com-
pleted, 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 fit-
ted cap when pass through
the walls.
- Airtightness test should be.
- Brazing operations to com-
ply with standards.
- Flare to comply with stan-
dards.
- Flange connections to com-
ply with standards.
PIPE CONNECTIONS BETWEEN
INDOOR/OUTDOOR UNITS
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.