TEL AFA4000/E, Installation And Operating Manual

Page: 29 / 210

AFA4000/E VAV Airflow Controller / p.29
Function Description
•
Amber Alarm LED Halo illuminated
•
Audible alarm sounds - can be muted by pressing the Mute
pushbutton
•
Sash High relay operates (if configured)
Volume Pressure
•
Input 2 or 3 set to Analogue – Volume Pressure
•
Used to give volumetric output based on duct measurement using
restrictor device
Damper Feedback
•
Input 2 or 3 set to Analogue – Damper Feedback
•
Used for sash position control (AFA3000) model only
3.7.4.2 Digital input functions
Function Description
Alarm disable When input configured as Alarm is disabled:
•
Alarm disabled displays in the status window
•
Red Alarm LED Halo illuminated
•
Audible alarm muted
•
Mute Icon shown on display
Night set-back When input configured as Night Set-back is activated:
•
Night Set-back displays in the status window
•
Unit is driven to the VAV MIN operating position
•
Audible alarm muted
•
Mute Icon displays
•
Low Air alarm muted if set to Maintain Low Air
•
Reduce Low Air & Warning alarms active if set to Reduce Low Air
External alarm When input configured as External alarm is activated:
•
Red Alarm LED Halo illuminated
•
External Alarm toggles on / off in the status window (when
configured)
•
Audible alarm sounds. Can be muted by pressing the Mute
pushbutton
•
External Alarm relay operates (when configured)