AFA4000/E VAV Airflow Controller / p.101
If the airflow display is unstable following the calibration because of environmental turbulence
or sensor position and cannot be rectified, then it is possible to adjust the sensitivity of the
displayed value using the Display Smoothing parameter in the Cal Config menu. The controller
displays the velocity value as a rolling average over time and is adjustable over 1 to 100 seconds.
Note The control output is not affected by the display smoothing so will provide fast response
control based on the sensor output. If the control output is unstable due to turbulence on
the sensor, then the output can be tuned to give stable control in the Econ Config menu
(see section 8.2).
7.2 Auto Sash Controller 1, 2 or 3 position.
This section describes the calibration of the Auto Sash Controller from the AFA4000/E/AS.
Note: Refer to section 7.6 to calibrate the Auto Sash Controller from the Auto Sash keypad
1. From the Run Screen press and hold the Mute button for 5 seconds until the Main Menu is
displayed.
2. Use the ↑ / ↓ buttons to select Set Up Auto Sash. The display shows the message TEL SASH
CLOSER.
3. Press the Mute button to display the current Hardware and Software version, for example, 1.
HW2.0 FW1.1.
4. Press the ↓ button to scroll down and select Setup Menu and press Mute.
5. Enter the password (the factory default password is 1-0-0-1) and press Mute to continue.
6. In the Setup menu the controller displays System Profile.
7. Use the ↓ button to scroll through the menu, select Sash Settings and press Mute.
8. In the Autosash configuration menu, the display will show 1. Enabled.
9. Use the ↓ button to scroll through the menu and select 4. Calibration and press Mute.
10. Follow the on-screen instructions and set the sash to the centre opening, for example, 250
mm.
11. Press the ↓ button to find which arrow represents the sash closing and press Mute. This step
shows the controller which direction the motor needs to drive to close the sash.
12. Close the sash and press Mute. This step sets the sash position sensor output, 0 V position.
13. Fully open the sash and press Mute. This step sets the sash position sensor output, 10 V
position.
14. Set the sash to the lower position, for example, close and press Mute.
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