Emerson XDR Manuel D’Utilisation

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.

Efficient cooling of rack equipment depends on proper use of blanking plates in any voids in the rack 

and good cable management. Keep the Liebert XDR’s coils clear of any obstructions that may 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.

NOTE
Air bypass and recirculation can severely reduce the cooling effectiveness of the Liebert XDR. 

Liebert XDR

Front 

of 

Rack

Rear 

of 

Rack

Refrigerant 

Connections

Critical 

Equipment

Enclosure /Rack 

Shown from Side