Daikin EWAD270TZ-PR [35/75] Operating limits

OPERATING LIMITS

Table 3 - Air heat exchanger - Altitude correction factors

Legend:

A = Elevation above sea level (m)

B = Barometric pressure (mbar)

C = Cooling capacity correction factor

D = Power input correction factor

- Maximum operating altitude is 2000 m above sea level

- Contact factory in case the unit has to be installed at altitudes between 1000 and 2000 m above sea level

- Please refer to the Chiller Selection Software for a more accurate calculation

Table 4 - Available fan static pressure correction factors (for Silver and Gold version only)

The above data are referred to:

- Fan 800 mm diameter

- Fan speed 700 rpm or 705 rpm

Legend:

A = External Static Pressure (Pa)

B = Cooling Capacity (kW) Correction factor

C = Compressor Power Input (kW) Correction factor

D = Reduction of Maximum Condenser Inlet Air Temperature (°C)

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.

The minimum water content per unit should be calculated by using the Chiller Selection Software.

Water charge, flow and quality

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