Maintenance
Maintenance and service
For information on maintenance and service, refer to the HP website (http://www.hp.com).
Air and water heat exchanger maintenance
The air and water heat exchanger requires no maintenance. If particulates are present in the cooling water, a filter must be fitted immediately upstream from the water inlet fittings. Check the functionality of the condensation drainage system regularly. Regularly perform visual inspections for leaks (annually).
Water quality requirements and specifications
Also consider the required set point for the water temperature. Temperatures near or below 0ºC (32ºF) mean that the chilled water plant condenser is very close to or below the freezing point of the water. The chilled water temperature to be supplied to the MCS G2 unit is 5ºC (41ºF). Freezing water can cause a blockage and damage to the unit. So, an additive, such as glycol, might be necessary to lower the freezing point. However, the heat transfer potential of the water is lower, so the equipment must be derated properly.
In a cooling loop, metallic materials in a pipe distribution network are in constant contact with recirculating liquid and can react with impurities to cause corrosion that can develop into leaks or form deposits and blockages.
The rate of galvanic corrosion depends on the electrical potential between the two dissimilar metals and the temperature of the liquid.
A 10 degree increase in water temperature can double the rate of corrosion.
For more information, see the HP Modular Cooling System G2 Site Preparation Guide on the HP website (http://www.hp.com).
Acceptable water quality specifications
The following values are water quality ranges required for continuous quality of performance:
Parameter | Range |
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pH | |
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Maintenance 75