Danfoss VLT Automation VT Drive FC 322 Programming Manual page 247

VLT Automation VT Drive FC322
Programming Guide
25-29 Destage Function
Option:
[0] Disabled
[1] * Enabled
25-30 Destage Function Time
Range:
15 s* [0 - 300 s]
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Function:
The Destage Function ensures that the lowest numbers of pumps are running to save energy and
to avoid dead head water circulation in the variable speed pump. If the Destage Function is set to
Disabled [0], the par. 25-30 Destage Function Time
Function:
The Destage Function Timer is programmable to avoid frequent staging/destaging of the fixed speed
pumps. The Destage Function Time starts when the adjustable speed pump is running at
Motor Speed Low Limit [RPM]
par. 4-11
fixed speed pumps in operation and system requirements satisfied. In this situation, the adjustable
speed pump contributes a little to the system. When the programmed value of the timer expires, a
stage is removed, avoiding dead head water circulation in the adjustable speed pump.
MG.20.W1.22 - VLT is a registered Danfoss trademark
2 Parameter Description
will not be activated.
Motor Speed Low Limit [Hz]
or par. 4-12
2
, with one or more
245