Installation & Operation Manual - Model AVC5000
Contents of this Manual are Subject to Change Without Notification
Page 33
Example 3: Setback using Fume Hood Presence Sensor on DI-1
Dry Contact Input Logic:
FH Presence Detected: DI-1=OPEN
No FH Presence Detected: DI-1=CLOSED
Control Set Point Sequence for Example 3
DI-1 is OPEN
Presence is detected at the Fume Hood
Controller will maintain a face velocity of 100 FPM with a minimum volume
limit of 120 CFM and a maximum volume limit of 850 CFM
DI-1 changes from
OPEN to CLOSED
No Presence is detected at the Fume Hood
30 seconds after the DI-1 state changes from OPEN to CLOSED;
•
Face Velocity Set Point changes from 100 to 80 FPM
•
Min Volume Limit remains at 120 CFM
•
Max Volume Limit remains at 850 CFM
•
LCD Display shows “FH UnOcc” message
DI-1 changes from
CLOSED to OPEN
Presence is detected at the Fume Hood
Immediately after the DI-1 state changes from CLOSED to OPEN;
•
Face Velocity Set Point changes from 80 to 100 FPM
•
Min Volume Limit remains at 120 CFM
•
Max Volume Limit remains at 850 CFM
•
LCD Display no longer shows “FH UnOcc” message
Note:
The occupancy sensor may have an internal time delay of its own. Before setting
the AVC DI time delays, check to see if the occupancy sensor has a time delay and be
sure to take this into consideration when setting the AVC DI time delays.
Enable DI-1
Select either Dry Contact or BACnet
Enter the “FH Presence Detected” Face
Velocity Setpoint and Volume Limits
Save Changes
Enter the “No Presence Detected” Face
Velocity Setpoint and Volume Limits
Enter the time delay for the controller
to respond to the DI state change
Enter Message to be displayed on LCD
during the DI closed state (8 char. max)
