Danfoss VLT Automation VT Drive FC 322 Programming Manual page 250

2 Parameter Description
25-45 Staging Speed [Hz]
Range:
0.0 Hz* [0.0 - 0.0 Hz]
2
25-46 Destaging Speed [RPM]
Range:
0 RPM* [0 - 0 RPM]
25-47 Destaging Speed [Hz]
Range:
0.0 Hz* [0.0 - 0.0 Hz]
248
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Function:
Readout of the below calculated value for Staging Speed When adding a fixed speed pump, in order
to prevent an overshoot of pressure, the variable speed pump ramps down to a lower speed. When
the variable speed pump reaches the "Staging Speed" the fixed speed pump is staged on. Staging
Speed calculation is based on par. 25-42
[Hz] .
Staging Speed is calculated with the following formula:
STAGE %
= where n
HIGH
100
STAGE HIGH
Staging Threshold.
Function:
Readout of the below calculated value for Destaging Speed. When removing a fixed speed pump,
in order to prevent an undershoot of pressure, the variable speed pump ramps up to a higher speed.
When the variable speed pump reaches the "Destaging Speed" the fixed speed pump is destaged.
Destaging Speed is calculated based on par. 25-43
High Limit [RPM] .
Destaging Speed is calculated with the following formula:
DESTAGE %
= where n
100
DESTAGE HIGH
value of Destaging Threshold.
Function:
Readout of the below calculated value for Destaging Speed. When removing a fixed speed pump,
in order to prevent an undershoot of pressure, the variable speed pump ramps up to a higher speed.
When the variable speed pump reaches the "Destaging Speed" the fixed speed pump is destaged.
Destaging Speed is calculated based on par. 25-43
High Limit [Hz] .
Destaging Speed is calculated with the following formula:
DESTAGE %
=
100
DESTAGE HIGH
where n is Motor Speed High Limit and n
HIGH
MG.20.W1.22 - VLT is a registered Danfoss trademark
VLT Automation VT Drive FC322
Staging Threshold Motor Speed High Limit
, and par. 4-14
is Motor Speed High Limit and n
STAGE100%
Destaging Threshold
, and par. 4-13
is Motor Speed High Limit and n
HIGH DESTAGE100%
Destaging Threshold , and par. 4-14
is the value of Destaging Threshold.
DESTAGE100%
Programming Guide
is the value of
Motor Speed
is the
Motor Speed