44
MUL
TI V W
ater Mini System Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WATER CIRCUIT INSTALLATION
Freeze Protection
The piping system should be protected from freezing during winter conditions. Heating mode of the water cooled unit will reduce water loop
temperature and methods should be taken to prevent slush from forming and / or freezing of the loop water. In applications with leaving
water temperatures below 40°F, freeze protection should be considered. Use of ethylene glycol, propylene glycol, or methanol is acceptable.
Recommended levels of concentration (shown below) should be followed, however, the addition of antifreeze may lower the performance of
the water cooled unit due to reduced heat transfer and added pressure drop.
1. Find the corresponding correction factor from table below.
2. Multiply by the water cooled unit capacity to find the net water cooled unit capacity.
3. Apply the corresponding pressure drop correction factor from table below, and multiply by the water cooled unit pressure drop to find the
net water cooled unit pressure drop.
Table 23: Antifreeze Correction Factors.
Piping System Specifications
Antifreeze Type
Item
Antifreeze % by Weight
10%
20%
30%
40%
50%
Methanol
Cooling
0.998
0.997
0.995
0.993
0.992
Heating
0.995
0.99
0.995
0.979
0.974
Pressure Drop
1.023
1.057
1.091
1.122
1.160
Ethylene Glycol
Cooling
0.996
0.991
0.987
0.983
0.979
Heating
0.993
0.985
0.997
0.969
0.961
Pressure Drop
1.024
1.068
1.124
1.188
1.263
Propylene Glycol
Cooling
0.993
0.987
0.98
0.974
0.968
Heating
0.986
0.973
0.96
0.948
0.935
Pressure Drop
1.040
1.098
1.174
1.273
1.405
Figure 45: Cooling Capacity Correction Factor Chart.
Figure 46: Heating Capacity Correction Factor Chart.
Correction Fact
or
Antifreeze % by wt
0%
10%
20%
30%
40%
50%
1.000
0.990
0.980
0.970
0.960
0.950
0.940
0.930
Methanol
Ethylene glycol
Prlpylene glycol
Correction Fact
or
Antifreeze % by wt
0%
10%
20%
30%
40%
50%
1.000
0.990
0.980
0.970
0.960
0.950
0.940
0.930
Methanol
Ethylene glycol
Prlpylene glycol