Parameter

Range

 

 

Specific conductance at 25ºC

10–2500 µmhos

(77ºF)

 

 

 

Alkalinity ("M" as CaCO3)

150–1000 ppm

Sulfur (SO4)

0–150 ppm

Chloride (Cl)

0–100 ppm

 

 

Hardness (CaCO3)

0–350 ppm

Calcium hardness (CaCO3)

0–200 ppm

Magnesium hardness (CaCO3)

0–150 ppm

Copper (Cu)

< 0.20 ppm

 

 

Iron (Fe)

< 3.0 ppm

 

 

Aluminum (Al)

< 0.50 ppm

 

 

Sodium (Na)

0–1000 ppm

 

 

Silica (SiO2)

0–150 ppm

Zinc (Zn)

< 1.0 ppm

 

 

Manganese (Mn)

< 0.1 ppm

 

 

Phosphate Ortho- (Po4)

< 3 ppm

Bacteria

< 1000 CFU/ml

 

 

Suspended solids

< 10 ppm

 

 

If your water is out of range, consult a water quality expert.

HP recommends using particulate filtration on the dedicated water supply system connected to the HP Modular Cooling System G2 unit.

Frost damage

To avoid frost damage, the water temperature must not be allowed to fall below the minimum permissible temperature of +4 ºC (+39.2 ºF) at any point in the water cycle.

Before storage or transportation at sub-zero temperatures, the water cycle must be drained completely using compressed air. Avoid setting the target temperature lower than is necessary because the danger of falling below the dew point increases as water temperature decreases (condensation buildup). Ensure that the enclosure is sealed on all sides, and in particular at the cable inlet (condensation formation).

Water precautions

Take the following precautions during the installation of the MCS G2 unit:

•Before installing the HP Modular Cooling System G2 Hook-Up Kit, ensure that all foreign matter and particulates are flushed from the system.

•Evaluate the short-term and long-term system requirements against the available water capacity.

•Ensure that the chilled water loop is properly designed for liquid cooling systems and is separate from the sanitary water systems in your building (bathroom, sink, drinking water, and so on).

Maintenance 76