Data Aire DAFC-PB Manual dan Panduan Pengguna - Halaman 14
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Glycol System Concentration
Fill the system with water and sufficient 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.
Ethylene Glycol
% by Volume
0
10
20
30
40
50
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, fluid 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
Freezing Point of Aqueous Solutions
Freezing Point
Degrees F
32°
24°
15°
4°
-13°
-33°
14
Propylene Glycol
% by Volume
0
10
20
30
40
50
Freezing Point
Degrees F
32°
27°
18°
8°
-6°
-26°