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6. AAON FACTORY SETTINGS
To convert the differential pressure signal from the AAON Airflow Station to a flow value, the Area
Factor associated with the AAON Airflow Station has been entered by the factory; see Figure 3 in
Section 3 for proper pneumatic connection of the AAON Airflow Station. The AAON Airflow Signal
Processor Operating Range has also been configured for the specific application and will display the
measured flow rate in Engineering Units of actual cubic feet per minute (ACFM). For air density
compensation, the AAON Airflow Signal Processor receives a temperature input from the AAON
Temperature Transmitter and the job specific site altitude has been entered; see Figure 1 in Section 3 for
proper electrical connection of the AAON Temperature Transmitter and Section 6.3.2 for temperature
input signal configuration. If the Modbus® Slave communication option has been ordered for
communication with WattMaster Controls, the associated settings have been configured at the factory.
The Process Output of the AAON Airflow Signal Processor has been set to 0-10 VDC. The Process
Output is also field selectable (see Section 6.3.1).
Area Factor, Altitude, and Modbus® Slave communication settings are configured under the Tech
Configuration Menu (see Section 6.1). Operating Range, Engineering Units, and Temperature
Compensation, are configured under the Field Setup Menu (see Section 6.2).
6.1.
TECH CONFIGURATION MENU
The Area Factor, Altitude, and Modbus® Slave communication settings can be checked or reconfigured
under the Tech Configuration Menu. To set the parameters refer to the following procedure, below
subsections, and Section 4.3 for Key functions.
Step 1.
Enter the Tech Configuration Menu by pressing and holding the Up/Down Keys
simultaneously for 5 seconds.
Step 2.
Using the Up/Down/Left/Right Keys, enter password number 1000 and press the
Enter Key.
Step 3.
Once in the Tech Configuration Menu, use the Up/Down Keys to highlight the
required parameter for configuration as shown in Sections 6.1.1 through 6.1.4.
Press the Enter Key once to access the highlighted parameter Menu.
Step 4.
Once in the parameter menu, the parameter can be changed using the
Up/Down/Left/Right Keys. After the parameter has been changed, press the Enter
Key once. Then Press the ESC Key once to return to the Tech Configuration
Menu.
Step 5.
After all of the required parameters have been configured, exit the Tech
Configuration Menu by pressing the ESC Key. The Process Display (see Section
4.2) will then be displayed.