25-43 Destaging Threshold
Range:
Function:
Size related
*
[0 - 100 %]
130BA367.10
3
5
0 1
Seconds
Variable speed
pump
Fixed speed
pump
Motor speed
high limit
Destaging
speed
Motor speed
low limit
If the set-point is reached after staging before the variable
speed pump reaches its maximum speed - the system will
enter the state closed loop as soon as the feedback pressure
is crossing the set-point.
25-44 Staging Speed [RPM]
Range:
Function:
0
RPM
*
[0 - 0
RPM]
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
, and
Staging Speed is calculated with the following
formula:
STAGE = HIGH STAGE%
100
where n
HIGH
is Motor Speed High Limit and
n
STAGE100%
is the value of Staging Threshold.
25-45 Staging Speed [Hz]
Range:
Function:
0.0
Hz
*
[0.0 -
0.0
Hz]
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
, and
4-14 Motor Speed High Limit [Hz]
Staging Speed is calculated with the following
formula:
STAGE = HIGH STAGE%
100
where n
HIGH
is Motor
Speed High Limit and n
STAGE100%
is the value of
Staging Threshold.
25-46 Destaging Speed [RPM]
Range:
Function:
0
RPM
*
[0 - 0
RPM]
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
, and
4-13 Motor Speed High Limit [RPM]
.
Destaging Speed is calculated with the following
formula:
DESTAGE = HIGH DESTAGE%
100
where n
HIGH
is
Motor Speed High Limit and n
DESTAGE100%
is the
value of Destaging Threshold.
25-47 Destaging Speed [Hz]
Range:
Function:
0.0
Hz
*
[0.0
- 0.0
Hz]
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
, and
4-14 Motor Speed High Limit [Hz]
.
Destaging Speed is calculated with the following
formula:
DESTAGE = HIGH DESTAGE%
100
where n
HIGH
is Motor Speed High Limit and
n
DESTAGE100%
is the value of Destaging Threshold.
Seconds
Variable speed
pump
Motor speed
high limit
Destaging
speed
Motor speed
low limit
Fixed speed
pump
Motor speed
low limit
Destaging
speed
Motor speed
high limit
Seconds
Fixed speed
pump
Motor speed
high limit
Destaging
speed
Motor speed
low limit
Seconds
Controlled stop
command
activated
130BA368.10
Parameter Description
VLT
®
HVAC Drive Programming Guide
MG.11.CB.02 - VLT
®
is a registered Danfoss trademark
173
3
3
