IBM 6.1.8.2, Руководство по планированию и установке оборудования, Страница: 53 / 114

Figure 11. Mark selected EIA in the front of the rack
2. Mark the EIA locations in the rear of the rack, left and right.
Figure 12. Mark selected EIA in the rear of the rack
Model 1164-95X rear door heat exchanger specifications
Learn about the specifications of the 1164-95X rear door heat exchanger (feature code ECR2).
Table 11. Dimensions for the 1164-95X rear door heat exchanger
Width
Depth Height Weight (empty) Weight (filled)
600 mm (23.6 in.) 129 mm (5.0 in.) 1950 mm (76.8 in.) 39 kg (85.0 lb)
1
48 kg (105.0
lb)
1. A minimum of three people are required to lift the rear door heat exchanger because of the weight.
Heat exchanger performance
A heat removal of 100% indicates an amount of heat that is equivalent to the heat that is generated by the
devices that is removed by the heat exchanger and the average air temperature that is leaving the heat
exchanger is identical to that entering the rack (27°C (80.6°F) in this example). Heat removal in excess
of 100% indicates that the heat exchanger not only removed all of the heat that was generated by the
devices, but further cooled the air so that the average air temperature that is leaving the rack is lower than
air temperature that is entering the rack.
To help maintain optimum performance of the rear door heat exchanger and provide proper cooling for all
rack components, you must take the following precautions:
• Install filler panels over all unoccupied bays.
• Route signal cables at the rear of the rack so that they enter or exit the cabinet through the top and
bottom air baffles.
Chapter 3. Planning for hardware 33