Danfoss VLT Automation VT Drive FC 322 Programming Manual page 248

2 Parameter Description
2.21.4 25-4* Staging Settings
Parameters determining conditions for staging/destaging the pumps.
25-40 Ramp Down Delay
Range:
2
10.0 s* [0.0 - 120.0 s]
25-41 Ramp Up Delay
Range:
2.0 s* [0.0 - 12.0 s]
25-42 Staging Threshold
Range:
Application [Application dependant]
dependent*
246
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Function:
When adding a fixed speed pump controlled by a soft starter, it is possible to delay the ramp down
of the lead pump until a preset time after the start of the fixed speed pump to eliminate pressure
surges or water hammer in the system.
Soft Starter
Only to be used if [1] is selected in par. 25-02
Function:
When removing a fixed speed pump controlled by a soft starter, it is possible to delay the ramp up
of the lead pump until a preset time after the stopping of the fixed speed pump to eliminate pressure
surges or water hammer in the system.
Soft Starter
Only to be used if [1] is selected in par. 25-02
Function:
MG.20.W1.22 - VLT is a registered Danfoss trademark
VLT Automation VT Drive FC322
Programming Guide
Motor Start
.
Motor Start
.