Danfoss VLT FC 100 Series

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