TEL AFA4000/E - Page 126

AFA4000/E VAV Airflow Controller / p.126
8.2.1 ECON Configure Menu
item
Instructions
Manual / Automatic
Control output voltage can be set to Manual or Automatic
control.
Note: The controller displays Manual, Automatic, High Set
Point or Low Set Point above the output bar graph at
the top of the screen to show the current output
status.
Manual:
The output is displayed as 0 – 100%. Use the
↑ and ↓ arrows to adjust the value. Press
Mute to select the required value. The
output will remain fixed at this value.
Note: If the Output Type is set to Valve,
the manual output is relative to the
damper position. If the Output Type
is set to Damper or Inverter, the
manual output is relative to Volume.
Automatic:
The output automatically adjusts
continuously to make the displayed face
velocity equal to the Set Point (see below).
Automatic is used for VAV control.
High Set Point
Used for the following:
• to enter the required set point face velocity for the VAV
control
• to enter the High Set Point face velocity in occupied
mode when Dual Set Point control is used.
Low Set Point
Used to enter the required Low Set Point velocity in
unoccupied mode when Dual Set Point control is used.