Danfoss VLT AQUA Drive FC 202 Programming Guide

27-34 Stage O Speed [Hz]
Range: Function:
and more than 1 variable speed pump is
on, a variable speed pump is turned o.
3.24.8 27-4* Staging Settings
Parameters for conguring the staging transitions.
27-40 Auto Tune Staging Settings
When this parameter is enabled, the staging and destaging
threshold is auto tuned during operation. The settings are
optimized to prevent the pressure from overshooting or
undershooting when staging and destaging pumps.
Option: Function:
[0] * Disabled
[1] Enabled
27-41 Ramp Down Delay
Range: Function:
10 s* [0 - 120
s]
Enter the delay between turning on a pump
controlled by a soft starter and ramping down
a pump controlled by the frequency converter.
This parameter is only used for soft starter and
star/delta controlled pumps.
(27-41)
130BA598.11
Illustration 3.105 Ramp Down Delay
27-42 Ramp Up Delay
Range: Function:
2 s* [0 - 12
s]
Enter the delay between turning o a pump
controlled by a soft starter and ramping up a
pump controlled by the frequency converter.
This parameter is only used for soft starter
controlled pumps.
NOTICE
Not used with star/delta controlled
pumps.
(27-42)
130BA599.11
Illustration 3.106 Ramp Up Delay
27-43 Staging Threshold
Range: Function:
Size
related*
[ 0 -
100
%]
Enter the speed in the staging ramp at which
the xed speed pump is turned on. The value is
a percentage of the maximum pump speed.
If parameter 27-40 Auto Tune Staging Settings is
set to [1] Enabled, parameter 27-43 Staging
Threshold and parameter 27-44 Destaging
Threshold are kept up to date with the new
calculated values. If parameter 27-43 Staging
Threshold and parameter 27-44 Destaging
Threshold are modied via the eldbus or the
LCP, then the new values are used, but are
continuously automatically tuned.
e30bd075.12
Motor speed
high
Motor speed
low
Staging speed
Variable speed pump
Fixed speed pump
Monitor feedback and
change to closed loop if
Closed loop
Time
(27-43)
setpoint is reached
Illustration 3.107 Staging Threshold
27-44 Destaging Threshold
Range: Function:
Size
related*
[ 0 -
100
%]
Enter the speed in the staging ramp at which
the xed speed pump is turned o. The value is
a percentage of the maximum pump speed.
If parameter 27-40 Auto Tune Staging Settings is
set to [1] Enabled, parameter 27-43 Staging
Threshold and parameter 27-44 Destaging
Threshold are kept up to date with the new
calculated values. If parameter 27-43 Staging
Threshold and parameter 27-44 Destaging
Threshold are modied via the eldbus or the
Parameter Description Programming Guide
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Danfoss VLT AQUA Drive FC 202 Specifications

General

Brand	Danfoss
Model	VLT AQUA Drive FC 202
Category	DC Drives
Language	English