Asetek InRackCDU Installation, Operation & Maintenance Guide 3
1.1
CDU Cabinet
The CDU Cabinet mounts in the top 4U of a standard 19” rack. Mounting it inside of the rack makes it ideal
for data centers that are limited in floor space. The CDU Cabinet contains a liquid-to-liquid heat exchanger,
removable server coolant reservoir and removable power supplies. The CDU rejects (transfers) heat
generated by the connected servers into facilities liquid. The CDU is a passive device and relies on the
server and facilities pumps to circulate liquid. The CDU keeps facilities liquid and server cooling liquid
completely separate (i.e. no mixing of facilities and server liquid). Only heat is transferred between the
two liquids in the CDU.
The CDU Cabinet can also be configured with dew point control to ensure that the supply water
temperature is above dew point to prevent condensation from forming.
Connection to CDMs
Facility Connections
Ventilation Line
Liquid Reservoir (in Front)
Drain Line
PSU-B
PSU-A
