HP Integrity BL870c Server-Blade - Manual (Page 12)

Cooling Airflow Direction
Each enclosure includes its own forced-air cooling fans or blowers. Air flow for each enclosure
enters from the front of the rack and exhausts at the rear.
Weight
Because each cabinet houses a unique combination of enclosures, total weight must be calculated
based on what is in the specific cabinet. For enclosure weights and weight worksheets, see
Chapter 3 (page 15) .
Flooring
These servers can be installed either on the site’s floor with the cables entering from above the
equipment or on raised flooring with power and I/O cables entering from underneath. Because
cooling airflow through each enclosure is front-to-back, raised flooring is not required for system
cooling.
WARNING! An unsecured cabinet is prone to tipping. Seismic and Carrier-Grade cabinets are
designed to be bolted to the floor. Because the cabinet has no other provisions to prevent tipping,
it must never be put to use without first being bolted to the floor. Failure to do so can result in
product damage and serious personal injury or death.
Seismic and Carrier-Grade cabinets are designed to be bolted to the floor. In addition, Network
Equipment-Building System (NEBS) standards require that cabinets be bolted securely to a solid
concrete floor. However, the customer can choose to install this system in a computer room with
a raised floor. If so, the typical computer room raised floor must be reinforced to accommodate
the extra weight of the servers and to provide for the desired level of seismic protection.
The site floor structure and any raised flooring (if used) must be able to support the total weight of
the installed computer system as well as the weight of the individual cabinets and their enclosures
as they are moved into position. To determine the total weight of each cabinet with its installed
enclosures, see the weight worksheet for the server you are installing (
Chapter 3 (page 15) ).
Describing how to build a raised floor that can accommodate the weight of the rack, that meets
all NEBS standards, and that complies with local regulations is beyond the scope of this manual.
These requirements must be investigated by the customer or the customer’s installation provider.
The customer assumes all risk in using the seismic rack on a raised floor.
For your site’s floor system, consult with your HP site preparation specialist or an appropriate floor
system engineer.
Receiving and Unpacking Space
Identify areas that are large enough to receive and unpack the system from its shipping cartons
and pallets. Be sure to allow adequate space to remove the system equipment from the shipping
pallets using supplied ramps. Also be sure adequate personnel are present to remove each cabinet
from its shipping pallet and to safely move it to the installation site.
Ensure sufficient pathways and clearances for moving the server equipment safely from the receiving
and unpacking areas to the installation site. Verify that door and hallway width and height as well
as floor and elevator loading will accommodate not only the server equipment but also all required
personnel and lifting or moving devices. If necessary, the customer can elect to enlarge or remove
any obstructing doorway or wall.
For specific guidelines, see the specifications for the cabinets used in the system you are installing.
Operational Space
When planning the layout of the server site, use the cabinet dimensions, door swing, and service
clearances for the cabinet type(s) supported by the server you are installing. Because location of
12 Site Preparation Guidelines