HP Cluster Platform Site Preparation Guide

1.5.3 Access Space Requirements
The access space requirement includes the following minimum clearances for servicing. Table 1-8
shows the recommended minimum clearances. You might need to take into account the location
and access requirements of existing adjacent equipment. You might also need to leave additional
clearance to enable service representatives to step around doors and over floor-routed cables.
Consider the airflow requirements described in Section 1.5.4 in conjunction with access space
requirements. The airflow space requirement is specific to the size of the cluster and to the cooling
capacities at your site, and is typically larger than the minimum servicing clearances. For example,
the distance between two rows of computer racks is usually 2.13 meters (7 feet) to facilitate the
airflow for a hot aisle/cold aisle method of cooling.
Table 1-8 Recommended Minimum Clearances
Recommended ClearanceRequirement
122 cm (48 in)Component insertion and removal
91.4 cm (36 in)Rear access
Figure 1-4 shows the minimum service clearance for a sample three-rack configuration, and for
the larger airflow circulation space (not to scale).
Figure 1-4 Rack Clearances for Servicing
48"
36"
HPTC-0005
Air Circulation Space
Front Cabinet Service Space
Rear Cabinet Service Space
Warning!
Some single-rack dense cluster models contain zero-U power distribution units (PDUs). The
PDU is mounted to the side of the rack and you access it by removing the side panel from the
rack. Do not block access to the side panel by placing the rack close to other equipment. You
must be able to remove the panel and reach the switches and connectors on the zero-U PDU.
For additional recommendations, see Section 1.6.1.
24 Installation Planning