HP 20cp User Manual download pdf (Page 59)

Cooling system 59

Cooling system

HP POD 20c cooling system theory of operation

CAUTION: Using contaminated supply water can cause decreased cooling capacity or

disruption in service. The supply water must meet the guidelines stated in the HP Performance

Optimized Datacenter 20c Site Preparation and Requirements Guide. Damage caused by

contaminated supply water is not covered by the warranty.

The HP POD 20c has six heat exchangers configured in three zones that maintain temperature and cool the

equipment installed in the HP POD 20c. The HP POD 20c receives chilled water from your facility, cycles the

water through the heat exchangers to cool the air, and then the fans circulate the cool air throughout the HP

POD 20c.

A predetermined differential pressure setpoint between the hot aisle and the cold aisle is factory set. Do not

alter the setpoint without consulting HP. The speed of the fan units is regulated to maintain the differential

pressure between the hot aisle and the cold aisle. For more information, see "Fans (on page 62)."

The HP POD 20c chilled water flow rate is not regulated by the ECS system. Site control over chilled water

flow rate is necessary to allow 454 lpm (120 gpm

For more information on the cooling system, see the HP POD 20c Maintenance and Service Guide.

Measurement is in US gallons per minute.

Water supply temperature

The temperature of the water supplied to the HP POD 20c must be 13ºC to 24ºC (55ºF to 75ºF). Freezing

water can cause a blockage and damage to the POD.

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HP 20cp User Manual Page 59