HP 403349-003, Maintenance And Service Manual

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Maintenance 139
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. Check the functioning of the condensation drainage system regularly.
Regularly perform visual inspections for leaks (annually).
Water quality
CAUTION: Damage caused by water that does not meet the HP Modular Cooling System
water quality requirements is not covered by MCS warranty.
For specific guidelines concerning water quality, see the HP Modular Cooling System Site Preparation
Guide .
Condensation management
Any condensation that forms is collected in each individual cooling module and is taken through a
discharge tube to a condensation tray integrated in the base assembly. Where multiple cooling modules
are used, the condensate discharge tubes are connected to one another using quick connectors. Any
condensation that occurs is then removed through this series of connections to the condensation tray.
When the specified condensation level in the condensation tray is reached, a sensor activates a pump
that pumps the condensation into the return system. A further discharge tube runs out of the system from
condensation tray to drain excess fluid if needed. This hose should be connected to a collection system or
an external drain.
To ensure reliable drainage:
•
Ensure no kinks form in the drainage hose.
•
Do not reduce diameter of drainage hose.
•
Route the drainage hoses so that they always run downhill.
To avoid excessive buildup of condensate and to conserve energy, consider raising the cooling water
temperature to the necessary cooling capacity.
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.