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Slots, openings and perforations in the HP MCS (especially in doors) provide ventilation, reliable
operation, and prevent overheating and, therefore, should never be blocked or covered. To provide
proper front-to-back air flow, any open "U" space in the front of the HP MCS must be covered with a
HP 10000 Series Universal Filler Panel.
Caution:
Failure to cover open U spaces with blanking panels may result in improper
cooling that can lead to thermal damage.
Refer to the HP Modular Cooling System Site Preparation Guide for temperature and humidity
guidelines. For the HP Modular Cooling System Site Preparation Guide, go to
http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&lang
=en&cc=us&docIndexId=179111&taskId=101&prodTypeId=329290&prodSeriesId=1155256
Note:
Altitude derating of 1 Celsius for every 300 meters above sea level to a
maximum of 3,000 meters (1.8 Fahrenheit per every 1,000 feet up to a
maximum of 10,000 feet). No direct sustained sunlight.
Power considerations
Power is best managed within the HP MCS by the use of a power distribution unit (PDU). Depending
on the configuration, it may be necessary or desirable to use multiple PDUs to connect all devices
inside the HP MCS.
Each PDU should be connected to a dedicated (unshared) branch circuit that is suitably rated for the
continuous load of all the equipment connected to it. The total power load for a PDU should not
exceed 80 percent of the branch circuit rating.
If a PDU is not used, each piece of equipment within the HP MCS should be connected to a dedicated
branch circuit.
Power redundancy
High-availability Information Technology equipment such as servers and storage devices can be
configured with backup or redundant power sources and power supplies in either of the following
configurations:
• 1+1 design: Two power supplies can be provided where either power supply is capable of
sustaining the associated equipment's power demand.
• N+1 design: Typically three power supplies are provided, requiring at least two to handle the
equipment's power demand. If one fails, the other two remain on line with enough capacity to meet
the power demand.
It is important that the wiring and branch circuitry to each installation be suitably rated for the power
demand of the connected equipment. Routing the power through separate branch circuits, breaker
panels and PDUs is also recommended to provide additional redundancy.
Non-redundant
For equipment provided with a single source of power, all components should be connected to the
same power distribution device (PDU or UPS). The power distribution device should be suitably rated
for the connected load. If the total load exceeds the rating of the power distribution device, obtain a
suitably rated device or add a second power distribution device and divide the load equally between
the devices.
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