LG Standard inverter, Installation Manual

Page: 12 / 23

12 Air Conditioner
Connecting Pipes
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
Plumbing materials and storage methods
Drying Cleanliness Airtight
Should be no moisture inside No dust inside. There is no refrigerant leakage
Items
Moisture Dust Leakage
Cause failure
- Significant hydrolysis of refriger-
ant oil
- Degradation of refrigerant oil
- Poor insulation of the compres-
sor
- Do not cold and warm
- Clogging of EEV, Capillary
- Degradation of refrigerant oil
- Poor insulation of the compres-
sor
- Do not cold and warm
- Clogging of EEV, Capillary
- Gas shortages
- Degradation of refrigerant oil
- Poor insulation of the compres-
sor
- Do not cold and warm
Countermea-
sure
- No moisture in the pipe
- Until the connection is complet-
ed, 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 fitted
cap when pass through the
walls.
- No dust in the pipe.
- Until the connection is complet-
ed, 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.
- Airtightness test should be.
- Brazing operations to comply
with standards.
- Flare to comply with standards.
- Flange connections to comply
with standards.