Danfoss VLT FC 100 Series Programming Manual page 216

3. Parameter Description
3
25-44 Staging Speed [RPM]
Option:
0 N/A
25-45 Staging Speed [Hz]
Option:
0 N/A
25-46 Destaging Speed [RPM]
Option:
0 N/A
25-47 Destaging Speed [Hz]
Option:
216
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
Staging Threshold Motor Speed High Limit [RPM]
, par. 25-42, and
Staging Speed is calculated with the following formula:
η
STAGE
%
η = η
STAGE HIGH
100
where n is Motor Speed High Limit and n
HIGH
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
Staging Threshold Motor Speed High Limit [Hz]
, par. 25-42, and
Staging Speed is calculated with the following formula:
η
STAGE
%
η = η
STAGE HIGH
100
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
Destaging Threshold
based on , par. 25-43, and
Destaging Speed is calculated with the following formula:
η
DESTAGE
η = η
DESTAGE HIGH
100
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 Destaging Threshold , par. 25-43, and
Destaging Speed is calculated with the following formula:
η
DESTAGE
η = η
DESTAGE HIGH
100
where n is Motor Speed High Limit and n
HIGH
MG.11.C5.02 - VLT ® is a registered Danfoss trademark
®
VLT HVAC Drive Programming Guide
, par. 4-13.
is the value of Staging Threshold.
STAGE100%
, par. 4-14.
where n is Motor Speed High Limit and n
HIGH
Motor Speed High Limit
, par. 4-13.
%
where n is Motor Speed High Limit and n
HIGH
Motor Speed High Limit [Hz]
%
is the value of Destaging Threshold.
DESTAGE100%
is the value of
STAGE100%
is the
DESTAGE100%
, par. 4-14.