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level by reducing the required fan speed. This energy saving leads to a more efficient facility cooling in the data center. This
efficiency reduces the overall cooling costs while enabling higher density server deployment.
The Direct Liquid Cooling System has three main components:
•
Rack Mount CDU (cooling distribution unit)—The CDU is mounted on the top of the rack and contains the liquid-liquid heat
exchanger and coolant reservoir.
•
DLC manifold—The DLC manifold is mounted vertically on the hot-aisle side of the rack. The DLC manifold serves as the
pathway for the server coolant between the CDU and the server cooling loop.
•
Cooling loop—The cooling loop is a server-level pump and cold plate assembly that removes heat from the server
components.
The Direct Liquid Cooling System comes ready to plug and play into the data center. There is no need for a secondary
plumbing to be installed onsite.
For more information on the Direct Liquid Cooling System setup and operation, see the following guides:
•
HPE Apollo Direct Liquid Cooling System Site Preparation Guide
https://www.hpe.com/support/apollo-dlc-site-gde
•
HPE Apollo Rack Mount Coolant Distribution Unit User and Maintenance Guide
https://www.hpe.com/support/apollo-cdu-umg
•
HPE Apollo Rack Mount Coolant Distribution Unit (CDU) Monitoring Software Guide
https://www.hpe.com/support/apollo-cdu-sw-ug
Server-to-DLC manifold interconnect tube set
The DLC manifold is connected to the server cooling loop through pairs of interconnect tubes. The tube set is prefilled with
server coolant and sealed by drip-free quick connectors. The quick connector has an easy press-and-twist-to-connect coupling
with integrated locking mechanism.
The tube set and the cooling loop quick connectors are color coded. They correspond to the color-coded vertical rows of
connectors on the DLC manifold.
18
Component identification
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