5 Assembly and siting
5
16
Rittal Liquid Cooling Package
Floor conditions
– The floor of the installation space should be rigid and
level.
– Choose the installation site so that the unit is not situ-
ated on a step or uneven surface, etc.
Climatic Conditions
Electromagnetic interference
– Interfering electrical installations (high frequency)
should be avoided.
Heat loss from the equipment
– The equipment in the server enclosure being cooled
must generate a heat loss of at least 5 kW.
5.1.2
Prepare the installation room
The installation room must be divided into one cold air
zone and one hot air zone. This ensures that no cooling
capacity is lost due to mixing of cold and hot air.
Fig. 13:
Installation room with cold aisle containment
Key
1
LCP DX
2
Hot aisle
3
Cold aisle
5.1.3
Installation guidelines
The positioning in the rack aisles must be considered
when planning the layout. The following points are to be
considered:
– Heat loss in the adjacent server racks
– Air throughput in the adjacent server racks
– Distances from the adjacent server racks
Heat losses in the adjacent server racks
If the LCP DX is used in combination with server enclo-
sures with high heat losses, the number of LCP DX units
must be adapted according to the characteristic curves.
The air temperature difference between server inlet and
server outlet, which is determined by the equipment
used, is particularly important. As a rule of thumb, a tem-
perature difference of 15 K can be expected. There may,
however, be greater differences.
Air throughput in the adjacent server racks
Due to the containment of the hot and cold zones, it is
important to ensure that the LCP DX delivers a sufficient
amount of cold air into the cold zone. From there, the
cold air is drawn back into the server enclosures by the
equipment. A small surplus of air should generally be
provided in order to compensate for any short-term de-
mands of the equipment.
Distances from the adjacent server racks
In small applications and short aisles, the above points
will not have a major impact on properties or cooling ca-
pacity provided the hot zone is thoroughly and precisely
sealed off from the cold zone. For larger applications
and long aisles, however, it is important to ensure even
spacing of the cooling units, due to the loss of air
throughput caused by external pressure losses and con-
vection or radiation heat of the equipment. Other factors,
such as high-temperature rooms adjacent to the cold
zone or exterior walls warmed by the sun, can also oc-
cur.
5.2
Assembly procedure
5.2.1
General
Before the LCP DX can be bayed onto a server enclo-
sure, the following work should be carried out.
– Dismantle the side panels,
– Seal the server enclosure and
– Dismantle the server enclosure door.
Recommendation:
For easier servicing of the LCP DX, maintain
a distance of at least 1 m between the front
and rear of the device and the nearest wall.
Recommendation:
Room tempe22 °C at 50% relative air
humidity, according to ASHRAE guidelines.
Where necessary, these values should be
achieved by an additional room air-condition-
ing system.
3
2
1
Note:
All the components needed for cold aisle
containment are available from Rittal as ac-
cessories.
