Greenheck Vektor Laboratory Exhaust with VGN Technology Electrical Controls Information (476072) - Manual (Page 11)

General Electrical Controls Information
VGN Technology Control Flow Chart - Multiple Fans, With Staging
Positive Pressure Fault
Negative Pressure Fault
Yes
BMS
Control
Deadband Range
Fan On/Off
Cycling
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No No
No
No
No No
No No
Drive Fault
Bypass
Mode
Fan(s) in
Stall Mode
Time Period
Met?
Fan Stall
Monitor Time
Time Period
Met?
Static
Pressure
= Setpoint
BMS Control
Bypass Damper
PID
Reset by
BMS
Reset by
BMS
Reset at
Fault
Clr
Reset at
Fault
Clr
Reset by
BMS
Reset by
BMS
Yes
Yes
Static
Pressure
= Setpoint
Remove
a fan
Time Period
Met
Time Period
Met?
Time Period
Met?
Time Period
Met?
Time Period
Met?
Fan(s)
available to
add
VFD(S)
Full Speed
Add a
Fan
Increase
Fan(s) Speed
Send to
BMS Controller
Send to
BMS Controller
Fan
Full Speed
Max. VFD
Monitor Time
Required
Nozzle Area
Above Setpoint
(more positive)
Below Setpoint
(more negative)
Above Setpoint
(more positive)
Below Setpoint
(more negative)
Static Pressure
Value
Positive
Pressure
Alarm
Negative
Pressure
Alarm
Static
Pressure
Value
Close
Bypass
Damper
Open
Bypass
Damper
Bypass
Feedback
= Min. VDC
Bypass
Feedback
= Max. VDC
All Nozzle
Feedback at
Minimum
VFD(S)
Minimum
Speed
Decrease
Fan(s)
Speed
Fan(s)
Running
= 1
Reset by
BMS
Time Period
Met?
Reset by
BMS
Damper
Position
Monitor
Time
Static
Pressure
Value
Static
Pressure
Value
Drive Fault
Alarm
11 VGN Technology
®