14
Glycol System Concentration
Fill the system with water and sufcient 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, 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
To Next Page
Loading...
