A single-power-supply server operating at 208 V ac
This topic discusses a single-power-supply server operating at 208 V ac.
One power supply operating at 208 V ac supports a fully populated server, but it
does not support power or cooling redundancy.
System reliability guidelines
This topic provides a list of requirements to help ensure proper cooling and system
reliability.
To help ensure proper cooling and system reliability, make sure that the following
requirements are met:
v Each of the drive bays has a drive or a filler installed in it.
v There is adequate space around the server to allow the server cooling system to
work properly. Leave approximately 50 mm (2 in.) of open space around the
front and rear of the server. Do not place objects in front of the fans. For proper
cooling and airflow, replace the server cover before you turn on the server.
Operating the server for extended periods of time (more than 30 minutes) with
the server cover removed might damage server components.
v You have followed the cabling instructions that come with optional adapters.
v You have replaced a failed fan within 48 hours.
v You have replaced a hot-swap drive within 2 minutes of removal.
v For redundant and hot-swappable power supply operation, the power supplies
are connected to 200-240 V ac.
v Microprocessor sockets1-4each always contain either a heat-sink blank or a
microprocessor and heat sink.
Note: Microprocessor temperature, hard disk drive temperature, and planar
voltage sensing is not supported.
Working inside the server with the power on
This topic provides guidelines about working inside the server with the power on.
Attention: Static electricity that is released to internal server components when
the server is powered on might cause the server to halt, which might result in the
loss of data. To avoid this potential problem, always use an electrostatic-discharge
wrist strap or other grounding system when you work inside the server with the
power on. You can connect the wrist strap to a connector on the front of the server
(see “Front view” on page 13 for the location of the electrostatic-discharge
connector).
The server supports hot-swap devices and is designed to operate safely while it is
turned on and the cover is removed. Follow these guidelines when you work
inside a server that is turned on:
v Avoid wearing loose-fitting clothing on your forearms. Button long-sleeved
shirts before working inside the server; do not wear cuff links while you are
working inside the server.
v Do not allow your necktie or scarf to hang inside the server.
v Remove jewelry, such as bracelets, necklaces, rings, and loose-fitting wrist
watches.
v Remove items from your shirt pocket, such as pens and pencils, that might fall
into the server as you lean over it.
Chapter 5. Removing and replacing components 99
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