Daikin EWYQ085G-XS [21/40] Operating limits

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OPERATING LIMITS Table 3 Air heat exchanger Altitude correction factors A O 300 OOO 900 1200 R 1013 977 942 908 C 1 000 0 993 0 986 0 979 D 1 000 1 005 1 009 1500 1800 875 843 812 0 973 0 967 0 960 1 021 1 026 1 031 1 015 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 Table 4 Minimum glycol percentage for low air ambient temperature AAI 2 A 1 AAI 2 B l 3 8 10 20 3 10 20 15 20 30 40 12 20 30 40 Legend AAT Air Ambient Temperature C 2 A Ethylene glycol 1 B Propylene glycol 1 1 Minimum glycol percentage to prevent freezing of water circuit at indicated air ambient temperature 2 Air ambient temperature do exceed the operating limits of the unit a protection of water circuit may be needed in winter season at non working conditions 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 with a certain approximation using this simplified formula For 2 compressors unit M liters 12 153 x DT C 22 168 x P kW 21 40

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