Chapter 2 Unit Positioning 11
Liebert.CRV Series Air Conditioner User Manual
As you can see on CFD result above, it is not advised to place Liebert.CRV at the wall in single row layout. On the
contrary, it is not an issue in application with two rows and two or more Liebert.CRV units, as shown in Figure 2-6.
C
R
V
C
R
V
0
.6
m
~
1
.8
m
Min. 0.1m
Good approach:
Note: Please refer to the service area dimensions in Appendix 3.
Figure 2-6 CFD analysis result of two rows and two or more Liebert.CRV units
4. Solutions with redundancy
Following an example of more complex applications where N+1 redundancy provided.
Please note the number and size of Liebert.CRV units have to be designed in order to achieve required cooling
capacity if any of the units fails. The other option to easily achieve redundancy is CoolFlex (Cold aisle containment),
see point 5 below.
The CFD analysis result of solutions with redundancy is shown in Figure 2-7.
C
R
V
C
R
V
C
R
V
O
ff
Example of an application with one row and N+1 redundancy
(right side unit failed).
Example of an application with two rows and N+1 redundancy
(unit placed right down failed).
C
R
V
C
R
V
Figure 2-7 CFD analysis result of solutions with redundancy
5. Example of applications with CoolFlex
When high density IT equipment is used (typically over 10kW per rack) or load distribution in the row(s) of racks is not
constant and high energy efficiency is required it is strongly recommended to apply CoolFlex (cold aisle containment)
together with Liebert.CRV.
