028-0506-02_II-VZ8250_EN www.viconics.com
January 2020
18
VZ8250
[
Installation Guide
]
Airflow level
2/2 Balancing (PI)
50 CFM
50 CFM
Balometer
Min. flow
Damp. override
-5 CFM
Min. flow offset
49 CFM
Airflow setpoint
Pressure Independent
Configuration parameter
BACnet
Function description
Airflow Level
AHV110 (R)
Measured (calibrated) airflow:
•
Units = CFM
•
Min = 0
•
Max = 20000
Airflow Setpoint
AI350 (R)
Measured (calibrated) airflow:
•
Units = CFM
•
Min = 0
•
Max = 10000
Damper Override
Force damper to selected
position during balancing
MV172 (R/W)
0
None (Default)
No damper override. Damper under normal control.
1
Min. flow
Force damper to maintain minimum airflow setpoint
2
Max. cool
Force damper to maintain maximum cooling airflow setpoint
3
Close
Force damper closed
4
Reheat
Force damper to maintain maximum reheat airflow setpoint
5
Open
Force damper fully open
Balometer
Measured value will be used to
update calibration Offset and
ensure measured Airflow level
matches Balometer reading.
Measured airflow from Balometer:
•
Units = CFM
•
Min = 0
•
Max = 20000
Minimum Airflow Offset
Calibration offset applied to
Airflow Level at Minimum flow
AV
258
Measured airflow from Balometer:
•
Units = CFM
•
Min = 0
•
Max = 20000
•
Default = 0
Maximum Airflow Offset
Calibration offset applied to
Airflow Level at Maximum flow
AV259
Measured airflow from Balometer:
•
Units = CFM
•
Min = -5000
•
Max = 5000
•
Default = 0