Daikin EWWQ290L-SS [19/41] Operating limits

OPERATING LIMITS

Legend:

A = Fouling factors (m2 °C / kW)

B = Cooling capacity correction factor

C = Power input correction factor

D = EER correction factor

Water content in cooling circuits The cooled water distribution circuits should have minimum water content to avoid

excessive compressors start and stop. In fact, each time the compressor starts up, an excessive quantity of oil goes from the

compressor sump and simultaneously there is a rise in the temperature of the compressor motor’s stator due to the inrush current

during the start-up. To prevent damage to the compressors, have been envisaged the application of a device to limit frequent stops and

restarts.

During the span of one hour there will be no more than 6 starts of the compressor. The plant side should therefore ensure that the

overall water content allows a more constant functioning of the unit and consequently greater environmental comfort.

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Table 2 - Water heat exchanger - Condenser Fouling factors