Danfoss VLT FC 100 Series Programming Manual page 161

Parameter Description
NOTE!
Do not set 14-20 Reset Mode to [13] Infinite auto reset
when 22-23 No-Flow Function is set to [3] Alarm. Doing so
will cause the adjustable frequency drive to continuously
3 3
cycle between running and stopping when a No-Flow
condition is detected.
NOTE!
If the adjustable frequency drive is equipped with a
constant speed bypass with an automatic bypass function
that starts the bypass if the adjustable frequency drive
experiences a persistent alarm condition, be sure to disable
the bypass's automatic bypass function, if [3] Alarm is
selected as the No-Flow Function.
22-24 No-Flow Delay
Range:
10 s [1 - 600 s] Set the time. Low Power/Low Speed must
*
22-26 Dry Pump Function
Select desired action for dry pump operation.
Option:
[0] OFF
*
[1] Warning
[2] Alarm
[3] Man. Reset
Alarm
NOTE!
Low Power Detection must be Enabled (22-21 Low Power
Detection) and commissioned (using either parameter
group 22-3*, No-Flow Power Tuning, or 22-20 Low Power
Auto Set-up) in order to use Dry Pump Detection.
3-134
®
VLT
Function:
remain detected to activate signal for actions.
If detection disappears before the timer runs
out, the timer will be reset.
Function:
The adjustable frequency drive will continue
to run but activate a Dry Pump warning
[W93]. An adjustable frequency drive digital
output or a serial communication bus can
communicate a warning to other equipment.
The adjustable frequency drive will stop
running and activate a Dry Pump alarm
[A93]. An adjustable frequency drive digital
output or a serial communication bus can
communicate an alarm to other equipment.
The adjustable frequency drive will stop
running and activate a Dry Pump alarm
[A93]. An adjustable frequency drive digital
output or a serial communication bus can
communicate an alarm to other equipment.
MG11CD22 - VLT
HVAC Drive Programming Guide
NOTE!
Do not set 14-20 Reset Mode, to [13] Infinite auto reset,
when 22-26 Dry Pump Function is set to [2] Alarm. Doing so
will cause the adjustable frequency drive to continuously
cycle between running and stopping when a dry pump
condition is detected.
NOTE!
If the adjustable frequency drive is equipped with a
constant speed bypass with an automatic bypass function
that starts the bypass if the adjustable frequency 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:
10 s [0 - 600 s] Defines for how long the Dry Pump condition
*
3.20.2 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 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 16-10 Power [kW] or 16-11 Power [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 16-10 Power [kW] or 16-11 Power [hp] in the
main menu. Note the power readout
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]
® is a registered Danfoss trademark
Function:
must be active before activating Warning or
Alarm