IBM 4002AC2, Installation And User Manual

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Table 10. Operating environmental conditions for the device (continued)
Description Range
Operating noise 65 dB
Maximum heat dissipation 689 BTU/Hr
Storage environment
Table 11. Storage environmental conditions for the device
Description Range
Storage temperature -25° to 70°C (-23° to 158°F)
Storage humidity 80% maximum, non-condensing
Cooling
The B24X has three speed-adjustable fans that operate simultaneously. If one fan
fails, it does not affect the operation of the other fans. The cooling fans cool the
CPU, main memory, and voltage regulators. The fans use a pull configuration to
intake air from the front left and right sides through the device and then expel it at
the rear of the device as shown in Figure 27.
1 Left intake 3 Right intake
2 Front intakes 4 Exhaust
v
Total cooling capacity: 200 watts
v Total air flow: 150 LFM
v Fan operating noise: < 65 dB-A.
Note: Operating noise is based on the ISO 7779 standard.
Power source interruptions
Table 12 shows how the B24X protects against power surges and power drops.
Table 12. Device power surge and drop protection
Property Protection Mechanism
Power surge MOV and Spark Gap protection
Power drop The PSU will shut down after AC loss >20ms
WR
Mgm t
Consol e
1
2
3
4
netx018
Figure 27. Device air flow
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