It is important to maintain sufficient temperature and
humidity control in the data center environment to prevent thermal
failures.
Use the following information to help plan for proper
cooling of the
Lenovo Flex System chassis
and rack components:
- The chassis airflow is from the front to the back. Make sure that
the airflow to the chassis is unobstructed at all times.
- Install the chassis and devices only in a rack that has perforated
front and rear doors with sufficient openings to allow for proper
airflow.
- Always install rack filler panels in empty bays to help ensure
proper air circulation.
- Install side covers on single racks to help prevent air recirculation.
- Multiple racks placed side by side must have side covers or be
joined together as a suite to prevent air recirculation between the
racks.
- Install a skirt or the recirculation prevention bracket on the
front of the rack to prevent air circulation below the rack.
- The following optional contaminant filter assemblies are available
for the chassis:
- Low profile filter assembly - attaches to the chassis and allows
the front door of most racks to close, but does not allow cabling
in front of the chassis.
- Extended profile filter assembly - attaches an extension collar
on the front chassis bezel and allows chassis component cabling in
front of the chassis and cable routing through the side of the extension
collar. The air filter attaches to the extended profile collar and
will not allow a rack door to close completely.
- If you plan to install the optional Rear Door Heat eXchanger V2 on the 42U 1100 mm Enterprise V2 Dynamic Rack, consider
the following requirements:
- Chilled, conditioned water must be provided that meets the heat
exchanger specifications.
- A water supply system must be installed that is suitable for your
data center.
- A redundant secondary cooling loop water supply, or enough room
air conditioning to handle the heat load must be provided if the function
of one or more of the heat exchangers is compromised. For example,
if the rear door is opened for rack maintenance or the conditioned
water supply to the door is stopped, the rack heat load is sent out
into the room and must be handled by room air conditioning until the
conditioned water supply is restored.
- Protective coverings should be installed to avoid tripping hazards
on non-raised floors as part of the water hose management.
For more information about cooling requirements
and considerations, see the Lenovo Flex System Enterprise Chassis Features and Specifications section,
the Lenovo Power and Cooling Related Links site, and the documentation that comes with your rack cabinet and
rear door heat exchanger.