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Screw

Rotary

Centrifugal

Reduce water flow

Increase running cost

Prevent plant s break down

Decrease refrigerant charge

Using nitrogen

Pressurised air

Chemical cleaning

Mechanical cleaning

Study about the plant

Judge quality of water

Checking the hardness of water

Fix descaling time for condenser

Decreased power factor

Increased supply voltage

Lower frequency operation

Decreased resistance mode