Data Aire gForce Ultra - 6. Glycol Systems; 6.1 Glycol Concentration; 6.2 Internal (Fluid) Volume - Downflow Units; 6.3 Internal (Fluid) Volume - Upflow Units

46 ● gForce Ultra User Manual 10-2014
6. GLYCOL SYSTEMS
6.1 Glycol Concentration
The system must be filled with water and the appropriate amount of glycol (either
ethylene or propylene) inhibitors to protect against winter freeze-up and premature coil
corrosion. To achieve the approximate glycol concentration, it is necessary to know the
total system volume. This consists of the sum of the fluid cooler volume, the
evaporator unit volume and the volume of the inter-connecting 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 – Downflow Units
Evaporator
Model
Standard Unit Volume In
Gallons (Liters)
Energy Saver Unit Volume In
Gallons (Liters)
GUGD 036
7.9 (30.0)
10.1 (38.2)
GUGD 045
9.5 (35.9)
10.6 (40.1)
GUGD 056
9.9 (37.4)
16.3 (61.7)
GUGD 070
12.2 (46.1)
18.8 (71.2)
GUGD 106
16.2 (61.3)
22.9 (86.7)
6.3 Internal (Fluid) Volume – Upflow Units
Evaporator
Model
Standard Unit Volume In
Gallons (Liters)
Energy Saver Unit Volume In
Gallons (Liters)
GUGU 036
7.9 (30.0)
9.2 (34.8)
GUGU 045
9.5 (35.9)
9.2 (34.8)
GUGU 056
9.9 (37.4)
15.9 (60.2)
GUGU 070
12.2 (46.1)
16.3 (61.7)
GUGU 106
16.2 (61.3)
23.1 (87.4)