59
12.2.8 - DX Free Cooling option (Options 118A and 118B)
The DX Free Cooling option is used to produce chilled water when the ambient air temperature is lower than the temperature
of the water to be cooled, without activating the compressors [the compressors can be used for a few seconds during a Free
Cooling cycle to transfer the refrigerant charge to the Free Cooling circuit – see Operation].
Only the unit fans and a low power pump that circulates the refrigerant in the Free Cooling circuit operate to generate cooling
power.
This ensures particularly high efciency during operation in Free Cooling mode.
Option 118A (Free Cooling on both circuits) is available for units from size 220.
Option 118B (Free Cooling on one circuit) is available across the entire range.
12.2.8.1 - Physical properties of units with the Free Cooling option
180 200 220 300 330 400 430 470 520
(1)
Standard unit + option 118A kg - - - 1462 1483 1958 1994 2170 2226 2646 2664 2864
Unit with option 15 + option 118A kg - - - 1570 1591 2084 2120 2313 2370 2808 2827 3044
Unit with option 15 + option 116S + 118A kg - - - 1709 1745 2244 2324 2517 2573 3051 3068 3324
(1)
Standard unit + option 118A kg - - - 1498 1520 1994 2030 2206 2263 2704 2722 2930
Unit with option 15 + option 118A kg - - - 1606 1628 2120 2156 2350 2407 2866 2884 3110
Unit with option 15 + option 116S + 118A kg - - - 1745 1782 2280 2360 2553 2610 3108 3125 3390
R410A
Circuit A
(1)
kg - - - 13,9 14,6 16,7 17,6 24,8 24,3 27,5 25,5 31,6
tCO
2
e - - - 29,0 30,5 34,9 36,7 51,8 50,7 57,4 53,2 65,9
Circuit B
(1)
kg - - - 14,0 14,6 25,0 24,7 25,4 25,4 29,5 30,3 31,8
tCO
2
e - - - 29,2 30,5 52,2 51,6 53,0 53,0 61,6 63,3 66,3
(1)
Standard unit + option 118B kg 1260 1301 1301 1431 1472 1929 1965 2133 2189 2608 2626 2824
Unit with option 15 + 118B kg 1343 1383 1384 1539 1580 2055 2091 2276 2333 2770 2789 3004
Unit with option 15 + option 116S + 118B kg 1482 1523 1523 1678 1734 2215 2295 2480 2536 3013 3030 3284
(1)
Standard unit + option 118B kg 1296 1337 1337 1467 1489 1965 2001 2169 2226 2666 2684 2890
Unit with option 15 + 118B kg 1378 1420 1420 1575 1597 2091 2127 2313 2370 2828 2846 3070
Unit with option 15 + option 116S + 118B kg 1517 1559 1560 1714 1751 2251 2331 2516 2573 3070 3087 3350
R410A
Circuit A
(1)
kg 8,4 10,9 10,9 12,6 13,1 14,7 15,4 20,3 21,1 23,5 23,5 26,8
tCO
2
e 17,5 22,8 22,8 26,3 27,4 30,7 32,2 42,4 44,1 49,1 49,1 55,9
Circuit B
(1)
kg 14,0 14,1 13,7 14,0 14,6 25,0 24,7 25,4 25,4 29,5 30,3 31,8
tCO
2
e 29,1 29,4 28,6 29,2 30,5 52,2 51,6 53,0 53,0 61,6 63,3 66,3
(1) Weights are guidelines only. Refer to the unit name plate.
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