Glycol Systems; Glycol Concentration; Internal (Fluid) Volume; Fluid Cooler Internal Volume - Data Aire MINI CEILING SERIES Installation, Operation And Maintenance Manual

6.0 GLYCOL SYSTEMS

6.1

Glycol Concentration

The system must be fi lled with water and the appropriate amount of ethylene or propylene glycol to
protect against winter freeze-up. To achieve the approximate glycol concentration, it is necessary
to know the total system volume. This consists of the sum of the fl uid cooler volume, the evaporator
unit volume, and the volume of the interconnecting piping.
The following tables can be used for arriving at an approximate system volume. After installation,
the glycol percentage should be checked. The glycol percentage should also be checked at regular
intervals to ensure freeze protection.
6.2

Internal (Fluid) Volume

Evaporator
Internal Volume
Model
DAMG 0112
DAMG 1.512
DAMG 0212
DAMG 2.512
6.3

Fluid Cooler Internal Volume

Fluid Cooler
Model
DAFC 06
DAFC 07
DAFC 09
DAFC 11
DAFC 15
6.4

Copper Piping Internal Volume

6.5

Freezing Point of Aqueous Solutions

Ethylene Glycol,
% by Volume
0
10
20
30
40
50
Energy Saver Coil
Volume, Gallons
Internal
Volume, Gallons
2.5
3.4
4.2
3.3
4.9
Pipe Diameter,
inches
5/8
3/4
7/8
1-1/8
1-5/8
2-1/8
Freezing Point
Degrees F.
32
24
15
4
-13
-33
Without
0.5
0.5
0.8
0.8
Fluid Cooler
Model
DAFC 17
DAFC 21
DAFC 24
DAFC 28
Volume per 100 Feet
of Pipe, Gallons
1.2
1.8
2.5
2.5
4.3
9.2
Propylene Glycol,
% by Volume
0
10
20
30
40
50
24
With
Energy Saver Coil
Volume, Gallons
2.0
2.0
2.5
2.5
Internal
Volume, Gallons
6.6
7.4
9.8
12.3
Freezing Point
Degrees F.
32
27
18
8
-6
-26