
35
IOM, ZS/ZT Models
Enertech Global
Antifreeze Charging
Calculate the total amount of pipe in the
system and use Table 4 to calculate the
amount of volume for each specific section of
the system. Add the entire volume together,
and multiply that volume by the proper
antifreeze percentage needed (Table 5) for the
freeze protection required in your area. Then,
double check calculations during installation
with the proper hydrometer and specific gravity
chart (Figure 7) to determine if the correct
amount of antifreeze was added.
Table 4: Pipe Fluid Volume
Type
Size
Volume Per 100ft
US Gallons
Copper
1” CTS
4.1
Copper
1.25” CTS
6.4
Copper
1.5” CTS
9.2
HDPE
.75” SDR11
3.0
HDPE
1” SDR11
4.7
HDPE
1.25” SDR11
7.5
HDPE
1.5” SDR11
9.8
HDPE
2” SDR11
15.4
Unit coaxial heat exchanger = 1 Gallon
Flush Cart = 8-10 Gallons
10’ of 1” Rubber Hose = 0.4 Gallons
SECTION 5: UNIT PIPING INSTALLATION
Table 5: Antifreeze Percentages by Volume
0.9600
0.9700
0.9800
0.9900
1.0000
1.0100
1.0200
1.0300
1.0400
1.0500
-5
0
5
10
15
20
25
30
32
Specific Gravity
Freeze Protection (deg F)
Procool
Methanol
Propylene Glycol
Figure 7: Antifreeze Specific Gravity
Type of Antifreeze
Minimum Temperature for Freeze Protection
10°F (-12.2°C)
15°F (-9.4°C)
20°F (-6.7°C)
25°F (-3.9°C)
ProCool (Ethanol)
25%
22%
17%
12%
Methanol
25%
21%
16%
10%
Propylene Glycol
38%
30%
22%
15%
Heat Transfer Fluid (HTF)
Mix according to manufacturer’s directions on container label
Antifreeze solutions are shown in pure form - not premixed
HTF is a premixed Methanol solution
Содержание ZS.
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