Cooling Requirements - Fujitsu Primergy BX900 S2 Upgrade And Maintenance Manual

Power supply
V
CAUTION!
If a PSU fails in a non-redundant configuration of PSUs, and the
remaining PSUs do not provide sufficient power, the system unit is shut
down immediately.
I
Make sure that the individual PSUs are connected to different phases.
This ensures additional phase redundancy for high availability
configurations. If only one phase fails, the PSUs connected to the other
phases remain operational. You can achieve full phase redundancy with
three PSUs. If more PSUs are installed, up to two PSUs must be
connected to each individual phase (for information on the electrical
connections, see the technical manual for the PRIMECENTER rack).
Phase redundancy is possible in regions where the single phase
provides 200 - 240V; in other regions with lower single-phase voltage,
two phases have to be coupled, which means that full phase redundancy
is not possible.
6.1.2

Cooling requirements

The BX900 S2 system unit is divided into 6 cooling zones. To achieve optimum
cooling of all components, the 6 cooling zones on the front and back of the
system unit must be fitted equally.
The following examples show how the various configurations of slots for PSUs
and fan modules as well as for server blades and/or storage blades should be
fitted.
V
CAUTION!
Any unused server blade slots must be fitted with dummy modules, see
"Installing a dummy server blade module" on page
88 Upgrade and Maintenance Manual
59.
BX900 S2