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NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting42
Group
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.
Group configuration
Path: Main > Setup > Group > Group Config
The Group Config settings define the options to use in the redundant Group.
# Systems. Set the number of Systems connected together to form this Group. Setting the number of
Systems to 1 disables the Group functions.
Setpoint Share. 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.
Idle Blwr Spd. 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.
Dmnd Fighting. 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.
Grp Fire Alrm. 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.
Grp Smoke Alrm. 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.