Cooling system
HP POD cooling system
CAUTION: Contaminated supply water might cause decreased cooling capacity or disruption in service. The supply water must meet the guidelines states in the HP
The HP POD has 12 heat exchangers that maintain temperature and cool the equipment installed in the HP POD. The HP POD heat exchangers receive chilled water from either the water distribution kit or your facility, cycles the water through the heat exchangers to cool the air, and then the fan units circulate the cool air throughout the HP POD.
To control the fan speed, you must set a cold aisle temperature through the BMS. A predetermined differential pressure setpoint between the hot aisle temperature and cold aisle temperature is factory set, and cannot be altered. The fan units regulate speeds to maintain the cold aisle temperature and differential pressure between the hot and cold aisle. For more information, see Controlling the fan speed (on page 27).
Water supply temperature
If you are using a water distribution kit, water is supplied to the HP POD between 13°C and 24°C (55°F and 75°F). HP recommends that you supply water to the water distribution kit between 4°c and 10°C (40°F and 50°F).
If you are not using a water distribution kit, HP recommends supplying water to the HP POD between 13°C and 24°C (55°F and 75°F).
Controlling the fan speed
The HP POD fans operate at variable speeds to maintain a predetermined differential pressure setpoint between the hot aisle and the cold aisle. You set your desired cold aisle temperature through your BMS, and the fan speed adjusts to maintain the differential pressure setpoint between the hot and cold aisle temperatures.
You cannot manually adjust the fan speed. To access the fan units:
1.Unlock the latch for that fan overhead.
Cooling system 27