Gingoog Electric Trading (G.E.T.) ™

December 2, 2009

Danfoss FC-202 VLT Aqua Features

Filed under: GET FC-200 series — Ralf @ 5:18 AM

Dedicated Water Features



Auto tuning of the PI Controllers


With auto tuning of the PI controllers, the Drive monitors how the system reacts on corrections made by the Drive and learns from it so that precise and stable operation is achieved quickly.

Gain factors for PI are continuously changed to compensate for changing characteristics of the loads.

This applies to each PI controller in the 4-menu sets individually.

Exact P and I settings at start-up will not be necessary and this lowers the commissioning costs.


Pipe Fill Mode


Enables controlled (closed loop) filling of pipes, Prevents water hammering, bursting of water pipes or blowing off sprinkler heads.
The new pipe fill mode is useable in both vertical and horizontal pipe systems.

This is very useful in all applications where controlled pipe filling is demanded, such as for example in irrigation systems, water supply systems and such alike.


End of Pump Curve


The end of pump curve feature detects breaks and leakages.
The end of curve triggers an alarm, shuts off the pump or performs another programmed action whenever a pump is found running at full speed without creating the desired pressure, a situation that can arise when a pipe breaks or leakages along the lines occur.


Check Valve Ramp


The check valve ramp prevents water hammering as the pump stops and the check valve closes.
The check valve ramp slowly ramps down the pump speed around the valve where the check valve ball is about to shut.

Dry Pump Protection


The dry pump protection lowers maintenance costs.
The VLT Aqua Drive constantly evaluates the condition of the pump, based on internal frequency/power measurements.

In case of a too low power consumption, indicating a no or a low flow situation, the VLT Aqua Drive will simply stop in order to prevent any damages on he equipment.


Sleep Mode


Sleep mode keeps pump wear, tear and power consumption to an absolute minimum.
In low flow situations, the pump will boost the system pressure and then stop.
Monitoring the pressure, the VLT Aqua Drive will restart when the pressure falls below the required level.

Flow Compensation


The flow compensation feature in VLT Aqua Drives exploits the fact that flow resistance decreases with educed flow.
The pressure set point is accordingly reduced, which in return saves again a lot of energy.

Initial/Final Ramp


The initial ramp provides fast acceleration of pumps to minimum speed, from where the normal ramp then takes over.
This prevents damages to the thrust bearings on the pump. The final ramp decelerates pumps from the minimum speed right down to the stop.

Sensorless Pressure


Sensorless Pressure or Flow Control or flow control is a patented VLT feature that allows pump manufacturers to control the constant head (pressure) or flow levels without the use of any additional external sensors whatsoever.
The cost and time of installing such devices, cabling and maintaining pressure are completely eliminated.
Reliability is also boosted as no additional components or connections can cause possible malfunction.

Payback Time Indication


One of the major reasons for applying a VLT Aqua Drive is the very short payback or return of investment time (ROI) due to very considerable energy savings plus of course the mechanical savings and reduced downtimes due to the much longer maintenance intervals.
The VLT Aqua Drive comes with a unique feature which continuously shows the remaining payback time for the initial investment, now that is quite something, isn’t it?

Motor Alternation


This built-in logic controls alternation between two pumps in duty/standby applications.
Motion of the standby pump prevents sticking of the pump. An internal timer assures equal usage of both pumps.
With an option card it is possible to control alternations between up to 8 pumps, now that is another WOW feature, right?

GET the real water expert and GET it done today


Please find also much much more on the general Drive subject in the

GET Drives Category

GET Savings Category

GET Applications Category

GET to know VFD’s Category

It is precisely there where you will find much more information to the general subject plus much more specific referrals to very much related downloads. When you prefer to view directly all the corresponding file folders you may also proceed directly to the FC-200 folder in our

GET Sky Drive Section

We certainly do hope that you enjoyed again the read and that you stay with us for more upcoming technical reading pleasure.

Retrieve our GET Contact Details or send us your E-mail inquiry through the GET Contact Form.

Ralf Wabersich

Gingoog Electric Trading (G.E.T.)

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