Raised-Floor And Non-Raised-Floor Environments - IBM Rear Door Heat eXchanger V2 Installation And Maintenance Manual

Raised-floor and non-raised-floor environments

If the coolant distribution unit (CDU) that is providing water to the heat exchanger is
in a row of racks with heat exchangers, all hoses can be routed on the floor,
irrespective of if it is a raised floor or slab installation. The Type 9363 rack has
sufficient clearance underneath the rack to enable the quick connects to be run
underneath the rack. This provides a very clean hose-routing solution with hoses of
minimum length.
Note: Each hose must be routed with a minimum bend radius of 200 mm (8 in.). A
If the hoses must be run overhead, either route the hoses through the rack
vertically, or route them vertically down the hinge (pivot) side of the heat exchanger,
leaving enough slack in the hoses to reach the couplings.
Figure 36. Routing and securing the hoses in raised-floor and non-raised-floor environments
After several hours of operation, repeat the air-purging procedure on the valve
(trapped air from the hoses might have migrated to the heat exchanger). To perform
the air-purging procedure, complete step 7 on page 52 through step 10 on page 52
in Filling the heat exchanger with water.
Check the heat exchanger for air in the manifolds again after one month of
operation, to be sure that the heat exchanger is filled correctly.
bend radius less than 200 mm (8 in.) will cause the hose to kink, will restrict
the flow of water to and from the heat exchanger, and will void the heat
exchanger warranty.
CDU
Chapter 4. Installing the heat exchanger
47