LG MULTI V WATER MINI Engineering Manual page 46

WATER CIRCUIT INSTALLATION
Piping System Specifications
Water Quality Requirements
Impurities in the water can influence the performance and life expectancy of the water cooled unit. The water must be tested and treated
using a local water treatment professional. The following levels must be maintained:
Basic Item
pH (77°F)
Conductivity (77°F) mS/m
Chlorine ions (mg Cl
-
Sulfate ions (mg SO
2
4
Acid consumption (pH4.8) (mgCaCO
Total Hardness (mg CaCO
Calcium Hardness (mg CaCO
Ionic-static silica (mg SiO
Reference Item
Iron (mg Fe/ℓ)
Copper (mg Cu/ℓ)
Sulfate ion (mg SO42/ℓ)
Ammonium ion (mg NH4+)ℓ
Residual chlorine (mg Cl/ℓ)
Free carbon dioxide (mg CO2/ℓ)
Stability index
The "●" mark for corrosion and scale means that there is a possibility of occurrence.
1
• Inhibitors must be used in the water loop, especially if water temperature operates above 104°F.
• Air must be purged from the system.
46 | WATER CIRCUIT
Closed Type System
Circulating Water
7.0 ~ 8.0
Below 30
/ℓ) Below 50
/ℓ) Below 50
/ℓ) Below 50
3
/ℓ) Below 70
3
/ℓ) Below 50
3
/ℓ) Below 30
2
Below 1.0
Below 1.0
Must not be detected
Below 0.3
Below 0.25
Below 0.4
Due to our policy of continuous product innovation, some specifications may change without notification.
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Supplemented Water Corrosion
7.0 ~ 8.0
Below 30
Below 50
Below 50
Below 50
Below 70
Below 50
Below 30
Below 0.3
Below 0.1
Must not be detected
Below 0.1
Below 0.3
Below 4.0
Effect
Scale
1 1
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