Daikin EWWD550EJYNN [14/26] Features

• Applied Systems • Chillers

• Chillers • R-134A • EWWD-EJYNN

3 Features

Certifications

All the EWWD-EJ units are CE marked (89/392).

Available Series

The EWWD-EJ units are available in 3 versions:

EWWD-EJ - standard.

EWLD-EJ - special execution without water condensers. The unit is specially designed for remote air condenser

application or evaporating gas condensers; the liquid receiver must be included in the plant circuit.

EWWD-EJ/A - high efficiency units

Water content in cooling circuits

The cooled water distribution circuits should have a 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’s 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, Daikin has 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. The minimum installation water content envisaged should be calculated with a certain

approximation using this formula:

(1) Q = 35,83

)C(T

(kW) P

°∆

where:

Q = minimum content of the plant expressed in litres

P = cooling capacity of the plant expressed in W

For a more accurate determination of the quantity of water, it is advisable to contact the designer of the plant.