American Power Conversion DX Benutzerhandbuch

Up to four Systems can be connected to form a redundant Group. Joining Systems together to form a 
Group provides the following:

•  Redundancy

•  A way for other Systems in the Group to assist with the room load

•  Demand fighting prevention (one System cooling while another reheats)

•  System run-time balancing

•  Setpoint sharing among Systems

•  Alarm sharing among Systems

Note: Group settings are copied to each System in the Group.

The Group Config settings define the options to use in the redundant Group. 

Set the number of Systems connected together to form this Group. Setting the number of 

Systems to 1 disables the Group functions.

Enable or disable setpoint sharing among the Systems of this Group. When setpoint 

sharing is enabled, changes to the cool or reheat setpoint on any System in the Group are copied to all of 
the other Systems.

Note: The humidify and dehumidify setpoints are always shared.

Set the behavior of the blowers for Systems that are in the idle, backup, or failed states. 

In raised floor installations, Systems that are not active (idle, backup, or failed) should maintain blower 
operation to maintain static pressure and to keep cool air flowing to your data-center equipment rather 
than up through an idle Module.

When enabled, reheat is prohibited for all Systems in the Group when any System in 

the Group has a cooling demand. This prevents Systems from working against each other.

Share fire alarms among the Systems in this Group. If the Group Fire Alarm setting is 

On, then all Systems in the Group will shut down if a fire alarm occurs in one System. If the Group Fire 
Alarm setting is Off, the alarm will still be shared with the other Systems, but they will not shut down.

Share smoke alarms among the Systems in this Group. If the Group Smoke Alarm 

setting is On, all Systems in the Group will shut down if a smoke alarm occurs in one System.