Danfoss VLT AQUA Drive FC 200 Programming Manual page 146

Parameter Description
NOTE
If the frequency converter is equipped with a constant
speed bypass with an automatic bypass function that starts
the bypass if the frequency converter experiences a
persistent alarm condition, be sure to disable the bypass's
automatic bypass function, if [2] Alarm or [3] Man. Reset
Alarm is selected as the Dry Pump Function.
22-27 Dry Pump Delay
Range: Function:
10 s [0 - 600 s] Defines for how long the Dry Pump condition
*
must be active before activating Warning or
Alarm
22-28 No-Flow Low Speed [RPM]
Range: Function:
Size related [ par. 4-11 - Used to set the speed for no-flow
*
par. 4-13 low speed detection.
RPM] If a low speed detection at a speed
different from the motor minimum
speed is needed, this parameter
may be used.
22-29 No-Flow Low Speed [Hz]
Range: Function:
Size related [ par. 4-12 - Used to set the speed for no-flow
*
par. 4-14 Hz] low speed detection.
If a low speed detection at a speed
different from the motor minimum
speed is needed, this parameter
may be used.
3.19.3 22-3* No-Flow Power Tuning
Tuning Sequence, if not choosing Auto Set Up in 22-20 Low
Power Auto Set-up:
1. Close the main valve to stop flow.
2. Run with motor until the system has reached
normal operating temperature.
3. Press [Hand On] and adjust speed for approx.
85% of rated speed. Note the exact speed.
4. Read power consumption either by looking for
actual power in the data line in the LCP or call
16-10 Power [kW] or 16-11 Power [hp] in Main
Menu. Note the power read out.
5. Change speed to approx. 50% of rated speed.
Note the exact speed.
6. Read power consumption either by looking for
actual power in the data line in the LCP or call
16-10 Power [kW] or 16-11 Power [hp] in Main
Menu. Note the power read.
®
VLT AQUA Drive Programming Guide
NOTE
Set 1-03 Torque Characteristics before tuning takes place.
22-30 No-Flow Power
Range:
0.00 kW
22-31 Power Correction Factor
Range:
100 %
22-32 Low Speed [RPM]
Range:
Size
related
22-33 Low Speed [Hz]
Range:
Size
related
®
MG20O602 - VLT is a registered Danfoss trademark
7. Program the speeds used in 22-32 Low Speed
[RPM], 22-33 Low Speed [Hz], 22-36 High Speed
[RPM] and 22-37 High Speed [Hz].
8. Program the associated power values in
22-34 Low Speed Power [kW], 22-35 Low Speed
Power [HP], 22-38 High Speed Power [kW] and
22-39 High Speed Power [HP].
9. Switch back by means of [Auto On] or [Off].
Function:
[0.00 - 0.00 Read out of calculated No Flow power
*
kW] at actual speed. If power drops to the
display value the frequency converter
will consider the condition as a No Flow
situation.
Function:
[1 - 400 Make corrections to the calculated power at
*
%] 22-30 No-Flow Power.
If No Flow is detected, when it should not be
detected, the setting should be decreased.
However, if No Flow is not detected, when it
should be detected, the setting should be
increased to above 100%.
Function:
[ 0 - par. To be used if 0-02 Motor Speed Unit
22-36 RPM] has been set for RPM (parameter not
*
visible if Hz selected).
Set used speed for the 50% level.
This function is used for storing values
needed to tune No Flow Detection.
Function:
[ 0.0 - par. To be used if 0-02 Motor Speed Unit
22-37 Hz] has been set for Hz (parameter not
*
visible if RPM selected).
Set used speed for the 50% level.
The function is used for storing values
needed to tune No Flow Detection.
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