Installation & Operation Manual - Model AVC5000
Contents of this Manual are Subject to Change Without Notification
Page 32
Example 2: Night Setback using Occupancy Sensor on Dry Contact Input DI-2
Dry Contact Input Logic:
Occupancy Detected: DI-2 = OPEN
No Occupancy Detected: DI-2=CLOSED
Control Set Point Sequence for Example 2
DI-2 state is OPEN
Lab is Occupied
Controller will maintain a face velocity of 100 FPM with a minimum volume
limit of 150 CFM and a maximum volume limit of 850 CFM
DI-2 state changes
from OPEN to CLOSED
Lab is set to go into Unoccupied Mode
60 seconds after the DI-2 state changes from OPEN to CLOSED;
•
Face Velocity Set Point changes from 100 to 75 FPM
•
Min Volume Limit changes from 150 to 120 CFM
•
Max Volume Limit changes from 850 to 700 CFM
•
LCD Display shows “LabUnOcc” message
DI-2 state changes
from CLOSED to OPEN
Lab is set to return to Occupied Mode
5 seconds after the DI-2 state changes from CLOSED to OPEN;
•
Face Velocity Set Point changes from 75 to 100 FPM
•
Min Volume Limit changes from 120 to 150 CFM
•
Max Volume Limit changes from 700 to 850 CFM
•
LCD Display no longer shows “LabUnOcc” 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-2
Select either Dry Contact or BACnet
Enter the “Occupied” Face Velocity
Setpoint and Volume Limits in this row
Save Changes
Enter the “Unoccupied” Face Velocity
Setpoint and Volume Limits in this row
Enter the time delay for the controller
to respond to the DI state change
Enter Message to be displayed on LCD
during the DI-2 closed state (8 char. max)
