Chapter 10. Environmental requirements 379
Figure 10-4 shows the IBM Rear Door Heat eXchanger details.
Figure 10-4 Rear Door Heat eXchanger (left) and functional diagram
The IBM Rear Door Heat eXchanger also offers a convenient way to handle hazardous “hot
spots”, which might help you lower the total energy cost of your data center.
10.3.4 IBM zBX physical specifications
The zBX solution is delivered either with one rack (Rack B) or four racks (Rack B, C, D, and
E). Table 10-7 shows the physical dimensions of the zBX minimum and maximum solutions.
Table 10-7 Dimensions of zBX racks
Top Exit Support FC 0545
This feature enables you to route I/O and power cabling through the top of the zBX rack. The
feature as shown in Figure 10-5 on page 380 will add 177 mm (7 in.) to the height and 9.75 kg
(21.5 lbs) to the weight of the zBX rack after it is installed. It can be ordered with a new zBX,
but can also added later. You need one feature per installed rack.
zBX rack
Building chilled water
Real Door Heat eXchanger
Cold air leaves the rack
Computer Room
Water Conditioner
(CRWC)
CL
Heatrise
Heatrise
Racks with
covers
Width
mm (in.)
Depth
mm (in.)
Height
mm (in.)
B 648 (25.5) 1105 (43.5) 2020 (79.5)
B+C 1296 (51.0) 1105 (43.5) 2020 (79.5)
B+C+D 1994 (76.5) 1105 (43.5) 2020 (79.5)
B+C+D+E 2592 (102) 1105 (43.5) 2020 (79.5)
Note: The Top Exit Support feature (FC 0545) has been withdrawn from marketing and
cannot be ordered if not already present on the zBX Model 004.
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