2.21.4 25-4* Staging Settings
Parameters determining conditions for staging/destaging the pumps.
25-40 Ramp Down Delay
Range:
Function:
10.0 s*
[0.0 - 120.0 s]
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.
Only to be used if
Soft Starter
[1] is selected in par. 25-02
Motor Start
.
25-41 Ramp Up Delay
Range:
Function:
2.0 s*
[0.0 - 12.0 s]
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.
Only to be used if
Soft Starter
[1] is selected in par. 25-02
Motor Start
.
25-42 Staging Threshold
Range:
Function:
Application
dependent*
[Application dependant]
2 Parameter Description
VLT
p
Automation VT Drive FC322
Programming Guide
246
MG.20.W1.22 - VLT
p
is a registered Danfoss trademark
2
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