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
3.20.2 22-3* No-Flow Power Tuning
Tuning Sequence, if not choosing
Auto Set Up
in par. 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 button on the LCP 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 par. 16-10
Power [kW]
or par. 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 par. 16-10
Power [kW]
or par. 16-11
Power
[hp]
in Main Menu. Note the power read
7. Program the speeds used in par. 22-32
Low Speed [RPM]
, par. 22-33
Low Speed [Hz]
, par. 22-36
High Speed [RPM]
and par. 22-37
High Speed
[Hz]
8. Program the associated power values in par. 22-34
Low Speed Power [kW]
, par. 22-35
Low Speed Power [HP]
, par. 22-38
High Speed Power
[kW]
and par. 22-39
High Speed Power [HP]
9. Switch back by means of
Auto On
or
Off
NB!
Set par. 1-03
Torque Characteristics
before tuning takes place.
22-30 No-Flow Power
Range: Function:
0.00 kW* [0.00 - 0.00 kW] Read out of calculated No Flow power at actual speed. If power drops to the display value the
frequency converter will consider the condition as a No Flow situation.
22-31 Power Correction Factor
Range: Function:
100 %* [1 - 400 %] Make corrections to the calculated power at par. 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%.
22-32 Low Speed [RPM]
Range: Function:
Application
dependent*
[Application dependant] To be used if par. 0-02
Motor Speed Unit
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.
22-33 Low Speed [Hz]
Range: Function:
Application
dependent*
[Application dependant] To be used if par. 0-02
Motor Speed Unit
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.
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C9.02 - VLT
®
is a registered Danfoss trademark
205
3
To Next Page
Loading...
Need help?
General
