Data Aire DAFC-11 Manual de usuario descargar pdf (Pagina 11)

Glycol System Concentration

Fill the system with water and sufﬁ cient antifreeze (ethylene or propylene glycol) to

protect the system against winter freeze-up. Refer to the chart below for amount of glycol

required to prevent freezing.

Freezing Point of Aqueous Solutions

Ethylene Glycol Freezing Point Propylene Glycol Freezing Point

% by Volume Degrees F % by Volume Degrees F

0 32° 0 32°

10 24° 10 27°

20 15° 20 18°

30 4° 30 8°

40 -13° 40 -6°

50 -33° 50 -26°

In order to achieve the appropriate glycol concentration it is necessary to know the vol-

ume that the system contains. The total volume includes the amount of liquid required by the

Data Aire indoor evaporator, ﬂ uid cooler, and the interconnecting piping. Glycol percentage

must be checked after installation and on periodic intervals to insure satisfactory protection.

Hydrometers are required to insure an accurate reading.

Field Piping

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Data Aire DAFC-11 Manual de usuario Pagina 11