LG Multi V Water IV - Water Circuit Installation: Piping System Specifications; Water Quality Requirements

79
Water Circuit Installation
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Water Quality Requirements
Impurities in the water can influence the performance and life expectancy of the water cooled unit. Use a local water treatment professional
to test and treat the water. Maintain the following levels:
Basic Item
Closed Type System Effect
Circulating Water Supplemented Water Corrosion
1
Scale
1
pH (77°F) 7.0 ~ 8.0 7.0 ~ 8.0 ● ●
Conductivity (77°F) mS/m Below 30 Below 30 ● ●
Chlorine ions (mg Cl
-
/ℓ) Below 50 Below 50 ●
Sulfate ions (mg SO
4
2
/ℓ) Below 50 Below 50 ● ●
Acid consumption (pH4.8) (mgCaCO
3
/ℓ) Below 50 Below 50 ●
Total Hardness (mg CaCO
3
/ℓ) Below 70 Below 70 ●
Calcium Hardness (mg CaCO
3
/ℓ) Below 50 Below 50 ●
Ionic-static silica (mg SiO
2
/ℓ) Below 30 Below 30 ●
Reference Item
Iron (mg Fe/ℓ) Below 1.0 Below 0.3 ● ●
Copper (mg Cu/ℓ) Below 1.0 Below 0.1 ●
Sulfate ion (mg SO42/ℓ) Must not be detected Must not be detected ●
Ammonium ion (mg NH4+)ℓ Below 0.3 Below 0.1 ●
Residual chlorine (mg Cl/ℓ) Below 0.25 Below 0.3 ●
Free carbon dioxide (mg CO
2
/ℓ) Below 0.4 Below 4.0 ●
Stability index ● ●
1
The “●” mark for corrosion and scale means that there is a possibility of occurrence.
• Use inhibitors in the water loop, especially if water temperature operates above 104°F.
• Purge air from the system.
Note:
WATER CIRCUIT INSTALLATION
Piping System Specications
Pipe Insulation
Water pipe insulation is suggested in the following conditions:
• If water pipe is subject to freezing.
• If water can condense on surface of pipe from ambient room temperatures higher than temperature of water in the pipe.
• On boiler water pipes to save energy losses from heat source.
• On condensate drain lines.
• Where required by local code.
If water temperature is maintained at 68°F in winter and 86°F in summer, insulation is not required (unless required by local code).
Table 61:Minimum Water Quality Requirements.