IBM 7979B1U User Manual - Page 91

Installing

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Important: If the server has two power supplies and you remove either of them, the server will not have redundant power; if the server power load then exceeds 835 W, the server might not start or might not function correctly. To remove a power supply, complete the following steps: 1. If only one power supply is installed, turn off the server and peripheral devices. 2. Disconnect the power cord from the power supply that you are removing. Attention: In a dc power environment, only trained service personnel other than IBM service technicians are authorized to connect or disconnect power to the dc power supply. See the documentation that comes with each dc power supply for removal instructions. 3. Grasp the power-supply handle. 4. Press the orange release latch down and hold it down. 5. Pull the power supply part of the way out of the bay. 6. Release the release latch; then, support the power supply and pull it the rest of the way out of the bay. If you have other optional devices to install or remove, do so now. Otherwise, go to "Completing the installation" on page 81. Installing a fan For proper cooling, the server requires that five fans be installed for each power supply installed. The server comes with five replaceable fans. If you install a second power supply, you must install the set of five fans that come with the power-supply. Important: Only the configurations that are shown in the following table are supported. The fan numbers are printed on the microprocessor air baffle. Installed power supplies Power supply 1 Power supplies 1 and 2 Required fans Fans in locations 3, 4, 8, 9, and 10 All 10 fans Attention: To ensure proper server operation, if a fan fails, replace it as soon as possible. Chapter 2. Installing optional devices 75

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Important:
If
the
server
has
two
power
supplies
and
you
remove
either
of
them,
the
server
will
not
have
redundant
power;
if
the
server
power
load
then
exceeds
835
W,
the
server
might
not
start
or
might
not
function
correctly.
To
remove
a
power
supply,
complete
the
following
steps:
1.
If
only
one
power
supply
is
installed,
turn
off
the
server
and
peripheral
devices.
2.
Disconnect
the
power
cord
from
the
power
supply
that
you
are
removing.
Attention:
In
a
dc
power
environment,
only
trained
service
personnel
other
than
IBM
service
technicians
are
authorized
to
connect
or
disconnect
power
to
the
dc
power
supply.
See
the
documentation
that
comes
with
each
dc
power
supply
for
removal
instructions.
3.
Grasp
the
power-supply
handle.
4.
Press
the
orange
release
latch
down
and
hold
it
down.
5.
Pull
the
power
supply
part
of
the
way
out
of
the
bay.
6.
Release
the
release
latch;
then,
support
the
power
supply
and
pull
it
the
rest
of
the
way
out
of
the
bay.
If
you
have
other
optional
devices
to
install
or
remove,
do
so
now.
Otherwise,
go
to
“Completing
the
installation”
on
page
81.
Installing
a
fan
For
proper
cooling,
the
server
requires
that
five
fans
be
installed
for
each
power
supply
installed.
The
server
comes
with
five
replaceable
fans.
If
you
install
a
second
power
supply,
you
must
install
the
set
of
five
fans
that
come
with
the
power-supply.
Important:
Only
the
configurations
that
are
shown
in
the
following
table
are
supported.
The
fan
numbers
are
printed
on
the
microprocessor
air
baffle.
Installed
power
supplies
Required
fans
Power
supply
1
Fans
in
locations
3,
4,
8,
9,
and
10
Power
supplies
1
and
2
All
10
fans
Attention:
To
ensure
proper
server
operation,
if
a
fan
fails,
replace
it
as
soon
as
possible.
Chapter
2.
Installing
optional
devices
75