Danfoss VLT HVAC Series Programming Manual page 268

3 Parameter Description
25-45 Staging Speed [Hz]
Range:
0.0 Hz* [0.0 - 0.0 Hz]
3
25-46 De-staging Speed [RPM]
Range:
0 RPM* [0 - 0 RPM]
25-47 De-staging Speed [Hz]
Range:
0.0 Hz* [0.0 - 0.0 Hz]
3-244
Function:
Readout of the below calculated value for Staging Speed. When adding a fixed speed pump, the
variable speed pump ramps down to a lower speed in order to prevent an overshoot of pressure.
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
Limit [Hz]
.
Staging Speed is calculated with the following formula:
STAGE
%
=
where n
100
STAGE HIGH
Staging Threshold.
Function:
Readout of the below calculated value for De-staging 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 "De-staging Speed" the fixed speed pump is de-staged.
De-staging Speed is calculated based on par.25-43
High Limit [RPM] .
De-staging Speed is calculated with the following formula:
DE−STAGE %
=
100
DE−STAGE HIGH
value of De-staging Threshold.
Function:
Readout of the below calculated value for De-staging 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 "De-staging Speed" the fixed speed pump is de-staged.
De-staging Speed is calculated based on par.25-43
High Limit [Hz]
.
De-staging Speed is calculated with the following formula:
DE−STAGE
%
=
100
DE−STAGE HIGH
where n is Motor Speed High Limit and n
HIGH
MG.11.C6.22 - VLT ® is a registered Danfoss trademark
VLT ® HVAC Drive Programming Guide
Staging Threshold
, and par.4-14
is Motor Speed High Limit and n
HIGH
De-staging Threshold , and par.4-13
where n is Motor Speed High Limit and n
HIGH
De-staging Threshold
, and par.4-14
is the value of De-staging Threshold.
DESTAGE100%
Motor Speed High
is the value of
STAGE100%
Motor Speed
is the
DESTAGE100%
Motor Speed