HP Modular Cooling System User Manual download pdf (Page 64)

Water quality and leveling requirements, and condensation management 64

Water quality and leveling requirements, and

condensation management

In this section

Water quality requirements and specifications........................................................................................... 64

Leveling requirements ............................................................................................................................. 66

Condensation management..................................................................................................................... 67

Water quality requirements and specifications

Tap water might be sufficient for some closed-loop systems. Water quality in a closed-loop system

encounters problems with scaling, blockage, leaks, and corrosion that are typically found in tap water

containing many chemicals and minerals. Determining the acceptable water quality range is the most

essential element of the system requirements. For more information, see the HP Modular Cooling System

Site Preparation Guide on the HP website (http://www.hp.com

Cooling water composition guidelines

• The closed-loop water must not contain any lime scale deposits or loose debris.

• The water should have a low level of hardness, particularly a low level of carbon hardness.

However, the water should not be so soft that it attacks the materials with which it comes into

contact.

• A 1-micron filter should be used to remove free floating particulates and regularly maintained.

• Salt content should be monitored because it rises over time as a result of evaporation in the systems,

causing the water to become more corrosive. (Electrical conductivity increases as the concentration

of dissolved substances rises.)

• Periodically some of the enriched water should be removed and new fresh water should be added to

avoid the formation of Gypsiferous water, which is unsuitable for cooling purposes. Gypsiferous

water has a tendency to form boiler scale, which is particularly difficult to remove.

• Cooling water should be free from iron and manganese because these minerals tend to settle in the

pipes and cause blockage.

• The presence of organic impurities with algaecides and other inhibitors should be minimized to

reduce the creation of sludge deposits and microbiological contamination.

Acceptable water quality range

The following are water quality ranges required for continuous quality of performance for the MCS unit:

Hydrological data Acceptable range

pH value 7–8.5

Carbonic acid > 3 < 8 ºdH

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