APC INROOM ACPSC3000 Operations Instructions download pdf (Page 43)

InRoom CW/DX – Operating Instructions

1.50

1.45

1.40

1.35

1.30

1.25

1.20

1.15

1.10

1.05

50%

40%

30%

20%

10%

-10 -8 -6 -4 -2 0 2 4 6 8 °C

14 17.6 21.2 24.8 28.4 32 35.6 39.2 42.8 46.4 °F

External water circuit

To seal the water circuit you must connect the unit to a chilled water ring mains, which contains for the ge-

neration of cold water either a chiller or a dry cooler or cooling tower. If the water quality is insufﬁ cient, we

recommend the additional installation of a 1000 micron strainer.

For protection against corrosion, use the anti-freezing solution if the water temperature passes under 5°C

or if the outside temperature is less than 0°C. All water lines need to be properly ﬂ ushed prior to starting of

the equipment.

Add the following quantities of ethylenglycol (indicated as percentage of weight of the water quantity):

water or outside air temperature ethylenglycol

from 41 to 23°F (+5 to -5°C) 10%

from 23 to 14°F (-5 to -10°C) 20%

from 14 to 5°F (-10 to -15°C) 28%

from 5 to -4°F (-15 to -20°C) 35%

from -4 to -13°F (-20 to -25°C) 40%

average cooling water temperature

Correction coefﬁ cient for the pressure

drop in the water circuit when using

ethylenglycol

6.3.3 InRoom Water and Glycol Piping

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APC INROOM ACPSC3000 Operations Instructions Page 43