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NetworkAIR IR Operation, Maintenance, and Troubleshooting 17
Set Up Module Control
The Module Control options are configured and tuned during the commissioning of each Module.
Calibrate airflow manually
Nom Coil DP: Set the nominal coil differential pressure.
Blower Spd. Adjust the frequency of the blower.
Coil DP: Displays the coil differential pressure at the bottom of the screen. As the blower frequency
is adjusted, the coil differential pressure will change. The Std Dry column in the table below gives the
recommended coil differential pressure for each Precision Air Conditioner model.
Calibrate airflow automatically
Nom Coil DP: Set the nominal coil differential pressure.
Start/Abort. Start the automatic calibration. If calibration is in progress, this line displays Abort.
Coil DP: Displays the coil differential pressure at the bottom of the screen. As the blower frequency
is adjusted, the coil differential pressure will change. When the Coil DP value matches the Nom Coil
DP value, the System will display Calibration Complete. If the System cannot align the two values,
the System will display Calibration Failed after two minutes. You must manually calibrate the
airflow if automatic calibration fails.
The settings in the Module Control menu are defined at the factory. Changing
the settings incorrectly can cause serious malfunctions and damage to your
System. Only qualified service personnel should make changes to these
settings.
Note
The System must be on and the blowers operating to calibrate the airflow manually. If
either condition does not exist, the display will prompt you to turn on the System and
blowers.
Coil Differential Pressure Values
Model Std Dry Min Max Alarm Clear Airflow Alarm
IR 40 CA 0.44 0.34 0.54 0.24 0.20
All values are displayed in inches water column ("WC)