Vertiv Liebert XD Series, System Design Manual

Page: 31 / 200

The Liebert XDR is engineered to fit the rear of computer enclosure cabinets.
Ensure that there is 25.6" (649mm) clearance in the rear to allow the door to open fully.
3.9.1 Airflow
The server fans draw air into the equipment enclosure. After heated the air, the server fans force the air
across the Liebert XDR’s two coils. The Liebert XDR has a low air-side pressure drop (similar to a rack with
perforated doors). The server fans within the rack create sufficient airflow to move the air.
Figure 3.6 Generic airflow diagram
Efficient cooling of rack equipment depends on proper use of blanking plates in any voids in the rack and
good cable management. Refer to the user manual supplied with the rack where the Liebert XDR is
mounted. Keep the Liebert XDR’s coils clear of any obstructions that might block the airflow.
Each of the Liebert XDR’s coils removes approximately half the load. For even cooling in partially filled
racks, servers should be evenly spaced and blanking plates should be installed on unused rack spaces to
prevent recirculation of heated air. The top and bottom of the rack must be sealed with floor and ceiling
panels. Not installing the panels will drastically reduce the Liebert XDR’s performance.
Vertiv | Liebert® Xtreme Density™ System Design Manual | 31