Vgn Technology Control Flow Chart - Greenheck Vektor Installation, Operation And Maintenance Manual

General Electrical Controls Information
VGN Technology Control Flow Chart - Multiple Fans, No Staging
Positive Pressure Fault
Negative Pressure Fault
No
Increase
Fan(s) Speed
Send to
BMS Controller
8
VGN Technology
BMS
Control
Drive Fault
Bypass
Mode
No
Fan(s) in
Stall Mode
No
Max. VFD
Monitor
Time
Static Pressure
Value
Static
Yes
Pressure
= Setpoint
No
Above Setpoint
(more positive)
Static Pressure
Value
Yes
VFD(S) at
Full Speed
No
Time Period
Met?
Yes Reset at
Fault Clr
Positive
Pressure
Alarm
Yes
Fan Stall
Monitor Time
Yes
Time
Period
Yes
Below Setpoint
(more negative)
Yes
All Nozzle
Feedback at
Minimum
No
No
VFD(S)
Minimum
Speed
Yes
Decrease
Fan(s)
Speed
Yes
Above Setpoint
(more positive)
Close
Bypass
Damper
No
Bypass
Yes
Feedback
= Min. VDC
Yes
Time Period
Met?
Reset by
BMS
Yes
Drive Fault
Alarm
Reset by
BMS
Fan
Min. VFD
Full Speed
Monitor
Time
Yes
Required
Nozzle Area
No
Time Period
Time
Met?
Period
Reset by
BMS
Yes
BMS Control
Bypass Damper
PID
Static Pressure
Value
Static
Pressure
= Setpoint
No
Below Setpoint
(more negative)
Static
Pressure
Value
Open
Bypass
Damper
No
Bypass
Yes
Feedback
= Max. VDC
No No
Time Period
Met?
Reset at
Fault Clr
Yes
Negative
Send to
Pressure
BMS Controller
Alarm
Damper
Position
Monitor
Time
®