Cooling Considerations; Air Temperature And Humidity - IBM 88861TU Planning Manual

Four power supplies attached to 220 V ac power sources
In this example, there are four power supplies that are attached to two separate
power sources.
v Power source A could be your utility provider
v Power source B could be your UPS service
Power
source A
Power
source B
Each power supply provides up to 1450 watts. Therefore, the total power available
for the BladeCenter S system would be as follows:
v Non-redundant power policy: 3562 watts
v AC power source redundancy power policy: 2900 watts

Cooling considerations

The operating environment for BladeCenter S systems must provide sufficient
temperature and humidity control to prevent BladeCenter S system thermal
failures.

Air temperature and humidity

Temperature and humidity limits exist for a BladeCenter S system.
The following table describes the permissible temperatures and humidity limits for
a BladeCenter S system when it is powered on.
Power
module 3
!
!
Power
module 4
Table 8. Temperature and humidity limits
Altitude
0 to 914 m (0 to 3,000 ft)
914 m to 2134 m (3,000 ft to
7,000 ft)
Temperature Range
10° to 35° C (50° to 95° F)
10° to 32° C (50° to 90° F)
Chapter 2. Planning for the physical environment
Power
module 1
Power
!
source A
!
Power
module 2
Power
source B
Humidity Range
8% to 80%
8% to 80%
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