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Surface Temperature
During operations, the exhaust surfaces, such as the fans mounted to the fabric
cards, are at a higher temperature than the exhaust air. Bear this situation in mind
when replacing a failed fan, because its temperature will be even greater.
Other Objects' Temperatures
No object should be in direct contact with the exhaust air. However, occasional
hanging cables or drop lamps might happen to be in the stream. Any objects in the
exhaust air stream will be at an elevated temperature because of this exposure.
Hot and Cold Aisles
The heat output of a fully configured Sun Datacenter Switch 3456 is approximately
40 KW. The Sun Datacenter Switch 3456s's air mass flow is calculated to
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approximately 3400 cfm (1.6 m
/s), which means that the air exhausted from the
switch is 36°F (20°C) degrees hotter than the air going in. As such, the hot aisle for
the Sun Datacenter Switch 3456 should be configured to accommodate this heat
output and in no way compromise the cooling of other equipment. Do not store any
objects in the switch hot aisle. Such objects would interfere with proper air
circulation, and might become a safety hazard.
Electrical Considerations
This section describes the voltages present and the exposure to active lines during
component installation.
Main Power
Caution – The 16 Sun Datacenter Switch 3456 power supplies require 200 -240 VAC.
Take all precautions normally associated with these voltages.
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Sun Datacenter Switch 3456 Installation Guide • December 2008
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