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VLT
®
HVAC Drive Programming Guide
22-23 No-Flow Function
Option:
[0] *
OFF
[1]
Sleep Mode
[2]
Warning
[3]
Alarm
22-24 No-Flow Delay
Range:
10 s*
[1 - 600 s]
22-26 Dry Pump Function
Option:
[0] *
OFF
[1]
Warning
[2]
Alarm
22-27 Dry Pump Delay
Range:
10 s*
[0 - 600 s]
3.20.2 22-3* No-Flow Power Tuning
Auto Set-up
Tuning Sequence, if not choosing
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 the power consumption either by looking for the actual power in the data line in the LCP or call par.16-10
[hp]
in the main menu. Note the power readout
5.
Change the speed to approx. 50% of rated speed. Note the exact speed
6.
Read the power consumption either by looking for the actual power in the data line in the LCP or call par.16-10
[hp]
in the main menu. Note the power readout
7.
Program the speeds used in par.22-32
[Hz]
8.
Program the associated power values in par.22-34
[kW]
and par.22-39
High Speed Power [HP]
9.
Switch back by means of
Auto On
Function:
Common actions for low power detection and low speed detection (Individual selections not possi-
ble).
Messages in the Local Control Panel display (if mounted) and/or signal via a relay or a digital output.
The adjustable frequency drive trips and the motor stays stopped until reset.
Function:
Set the time. Low Power/Low Speed must remain detected to activate signal for actions. If detection
disappears before the timer runs out, the timer will be reset.
Function:
Low Power Detection
must be Enabled (par.22-21
No Flow Power Tuning
either par. 22-3*,
pump detection.
Messages in the Local Control Panel display (if mounted) and/or signal via a relay or a digital output.
The adjustable frequency drive trips and the motor stays stopped until reset.
Function:
Defines for how long the dry pump condition must be active before activating a warning or alarm.
Low Power Auto Set-up
in par.22-20
Low Speed [RPM]
, par.22-33
Low Speed [Hz]
Low Speed Power [kW]
or
Off
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
Low Power Detection
Low Power Auto Set-up
, or par.22-20
:
, par.22-36
High Speed [RPM]
, par.22-35
Low Speed Power [HP]
3 Parameter Description
) and commissioned (using
) in order to use dry
Power [kW]
Power
or par.16-11
Power [kW]
Power
or par.16-11
and par.22-37
High Speed
, par.22-38
High Speed Power
3-199
3
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