ClearCube R Series Pentium 4 - Manual (Page 45)

ClearCube Product Manual and Installation Guide Network Planning and Site Preparation • 35
Cooling and Airflow Requirements
Each complete Cage produces between 2000 and 2800 btu/hr (590 to 820 Watts) of
heat, depending on processor activity. Ensure that the air conditioning and ventilation
system for the installation area can accommodate this thermal load. The rear of the
Cage has air vents for four fans. The fan openings must be at least four inches from
any airflow impeding barriers such as walls, the rear of the rack door or panel, large
bundles of cables, etc. The availability of an air exit path from these fans is imperative
to the efficient operation of the unit. Failure to provide sufficient air venting will result in
a thermal overload of the Blade. If the Cage is installed in a cabinet use a fully vented
rear door or panel.
Power Requirements
Your ClearCube system centralizes all computing components in a single location
thereby concentrating the majority of the power needed to this one area. Although the
ClearCube solution reduces the overall power required when compared to traditional
box PCs, the power demands in the IT center are increased. Use the following power
and current specifications to ensure that your facilities can provide the required power
safely without tripping your circuit breakers.
You need to ensure that your power circuits can safely handle the peak current that
can be drawn by a Cage. The peak current usually occurs when a Cage and all eight
Blades are powered on simultaneously. This maximum current must be supported by
your power circuit. A Cage with a BackPack and eight Blades installed can draw a
peak current of 12 amps at 120 VAC (6 amps at 240 VAC) during power on. The peak
current is reached only briefly and thereafter the current draw levels out to a typical
range of between 6 and 8 amps at 120 VAC, depending on processor activity. If your
existing power circuit cannot handle the peak current of 12 amps, you must have
additional power system capacity installed by a qualified electrician.
If you are putting multiple Cages on a single power circuit, ensure that the circuit can
safely handle the combined peak currents of the Cages. For example, if you place two
Cages on a single branch circuit, it must support a peak current of 24 amps at 120 VAC.
When specifying uninterruptible power supplies (UPS), use the peak current draw (12
amps at 120 VAC per Cage or 1440 Volt-Amps) to determine the appropriate UPS.
CAUTION: Failure to provide sufficient space and room ventilation will
result in overheating that can cause eventual unit failure not covered as
part of the unit warranty.
CAUTION: Make sure your power strips, power grid, and circuit breakers
can safely provide the required current. Ensure that any extension cords
used meet local safety regulations and local fire codes.