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Application of Liebert
®
CRV
Liebert CRV - PD - 265086 - 11.01.2018
2.4 Positioning - Units placement
This chapter provides some ideas of typical installation of the Liebert
®
CRV unit(s), shows several ex
-
amples of the server room layouts and applications using Liebert
®
CRV units.
In order to eliminate the transmission of vibrations, avoid any contacts between Liebert
®
CRV unit and
the racks of the server room. If coverage (e.g. “Smart Aisle™”) is installed, avoid its contemporary con
-
tact with both, racks and CRV.
For best performances of Liebert
®
CRV is important to:
•
reduce at minimum recirculation from hot aisle around the ends and/or over the top of the racks,
prevent gaps between the racks
•
reduce at minimum recirculation from hot aisle through server racks by using blanking panels
•
ensure cold air is being distributed across the front of all neighboring equipment racks by properly
placed Liebert
®
CRV unit(s)
•
distribute load within the rack - it is generally advised to distribute the load as much possible uni-
formly across the rack height.
For more details refer to following details or contact Vertiv Sales Representative.
2.4.1 Single Row Placement
The Liebert
®
CRV can be placed either at the end of a row or in between server racks. Locating a Lieb-
ert
®
CRV at the end of a row helps to isolate the end of the cold aisle from the surrounding space; pro-
tecting it from hot air wrapping around the sides of the aisle. The 2T rack temperature sensors sample
supply and return air temperatures.
When deploying multiple Liebert
®
CRV, it is recommended that units be installed at the end of rows
with their baffles set to direct cold supply air towards the server equipment (Fig. 2b). Depending on row
length, heat density and airflow requirements, additional cooling units can be installed throughout the
row with their baffles set to direct supply air left and right.
Fig. 2b Liebert® CRV – Single Row Placement
2.4.2 Two Rows Placement
Cooling becomes more effective when there is a barrier or a second row of racks in front of the Liebert
®
CRV unit. Also in this case it is recommended to install one Liebert
®
CRV unit at each end of the 2 rows,
with their baffles directed towards the IT equipment. Depending on the row length, heat density and
airflow requirements, additional cooling units can be installed throughout the row with their baffles set
to direct supply air left and right (Fig. 2c).
C
R
V
Cold Supply Air
Rack Rack Rack
C
R
V
Rack Rack Rack
C
R
V
Hot Return Air
Summary of Contents for Liebert CRV 300 CW
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