22-26 Dry Pump Function
Select desired action for dry pump operation.
Option:
Function:
[0]
*
Off
[1]
Warning
The drive will continue to run, but activate a
Dry pump warning [W93]. A drive digital
output or a serial communication bus can
communicate a warning to other equipment.
[2]
Alarm
The drive will stop running and activate a Dry
pump alarm [A93]. A drive digital output or a
serial communication bus can communicate
an alarm to other equipment.
[3]
Man. Reset
Alarm
The drive will stop running and activate a Dry
pump alarm [A93]. A drive digital output or a
serial communication bus can communicate
an alarm to other equipment.
NOTE
Low Power Detection
must be Enabled (
) and commissioned (using either parameter group
22-3*,
No Flow Power Tuning
, or
in order to use Dry Pump Detection.
NOTE
Do not set
, to [13] Infinite auto reset, when
is set to [2] Alarm. Doing so will
cause the drive to continuously cycle between running and
stopping when a Dry Pump condition is detected.
NOTE
If the drive is equipped with a constant speed bypass with an
automatic bypass function that starts the bypass if the drive
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
3.20.2 22-3* No-Flow Power Tuning
Tuning Sequence, if not choosing
Auto Set Up
in
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
or
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
or
in Main Menu.
Note the power read
7.
Program the speeds used in
,
,
and
8.
Program the associated power values in
and
9.
Switch back by means of
Auto On
or
Off
NOTE
Set
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
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:
Size related
*
[0 - par. 22-36 RPM]
22-33 Low Speed [Hz]
Range:
Function:
Size related
*
[0.0 - par. 22-37 Hz]
22-34 Low Speed Power [kW]
Range:
Function:
Size related
*
[0.00 - 0.00 kW]
Parameter Description
VLT
®
HVAC Drive Programming Guide
144
MG.11.CB.02 - VLT
®
is a registered Danfoss trademark
3
3
