Data Aire dap4 User Manual page 96

Zone Master Operation (continued)
The Zone Master feature requires an activation code for each unit connected
to the Zone Master network.
Also, all units in a zone must have the same software version. If units were
installed at different times, they may not have the same software version.
Please check the dap4 software version by using menu F- "Information". If
needed, please contact the Data Aire service department to obtain a software
update for USB installation.
Please read the Zone Master supplement for installation information.
Fan Operation is based on the fan mode setting of the master:
Disabled - (default) The Zone Master does not control the fan of the units
and the unit will use its own fan control mode.
Constant Airflow – The Zone Master will modulate the fan speed of all
running units in the zone to maintain the zone airflow set point. All units in
the zone will be controlled by the master regardless of the unit's own
setting. This selection requires an optional airflow measuring sensor to be
installed. An additional airflow tuning screen will appear in the Zone Master
menu allowing you adjust the airflow set point and tune the airflow
modulation.
Unity Cooling – Allows a BMS system to control the airflow set point.
Maximum Rack - The Zone Master will modulate the fan speed of all
running units in the zone based on the maximum rack temperature.
Average Rack - The Zone Master will modulate the fan speed of all
running units in the zone based on the average rack temperature
C Air Prs - The Zone Master will modulate the fan speed of all running units
in the zone to maintain static air pressure. If all units have an air pressure
sensor installed, the master will use the lowest usable reading. Otherwise
the master will use its air pressure sensor.
Note: The rack selections described above, require each unit to have rack
temperature sensors installed. The rack temperature of each unit can be
Important Notice
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