Danfoss VLT AQUA Drive FC 202 Programming Manual

Also see for VLT AQUA Drive FC 202: Service guide Installation guide Installation guide Operating guide Installation guide

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Danfoss VLT AQUA Drive FC 202 Programming Manual Manual pdf 191 page image

3.24 Parameters 29-** Water ApplicationFunctionsThe group contains parameters used for monitoring water/wastewater applications.3.24.1 29-0* Pipe Fill functionIn water supply systems water hammering can occur whenfilling the pipes too fast. It is therefore desirable to limitthe filling rate. Pipe Fill Mode eliminates the occurrence ofwater hammering associated with the rapid exhausting ofair from the piping system by filling the pipes at a lowrate.This function is used in horizontal, vertical and mixedpiping systems. Due to the fact that the pressure inhorizontal pipe systems does not climb as the system fills,filling horizontal pipe systems requires a user specifiedspeed to fill, for a user specified time and/or until a userspecified pressure set-point is reached.The best way to fill a vertical pipe system is to use the PIDfunction to ramp the pressure at a user specified ratebetween the motor speed low limit and a user specifiedpressure.The Pipe Fill function uses a combination of above toensure a safe filling in any system.No matter which system - the pipe fill-mode will startusing the constant speed set in 29-01 Pipe Fill Speed [RPM]until the pipe fill-time in 29-03 Pipe Fill Time has expired,thereafter filling will continue with the filling ramp set in29-04 Pipe Fill Rate until the filling set-point specified in29-05 Filled Setpoint is reached.130BA611.10Max. speedFill speedMin. speedClosed loopNormal rampInitial rampFill time or filled setpointSpeedIllustration 3.87 Horizontal Pipe System130BA612.10Max. speedMin. speedClosed loopFill rate unit/sec.Initial rampTimeSpeedFilled setpointIllustration 3.88 Vertical Pipe System29-00 Pipe Fill EnableOption: Function:[0] Disabled Select Enabled to fill pipes at a user specified rate.[1] Enabled Select Enabled to fill pipes with a user specifiedrate.29-01 Pipe Fill Speed [RPM]Range: Function:Sizerelated*[ par.4-11 -par. 4-13RPM]Set the filling speed for filling horizontalpipe systems. The speed can be selectedin Hz or RPM depending on the choicesmade in parameter 4-11 Motor Speed LowLimit [RPM]/parameter 4-13 Motor SpeedHigh Limit [RPM] or inparameter 4-12 Motor Speed Low Limit [Hz]/parameter 4-14 Motor Speed High Limit[Hz].29-02 Pipe Fill Speed [Hz]Range: Function:Sizerelated*[ par.4-12 -par. 4-14Hz]Set the filling speed for filling horizontalpipe systems. The speed can be selectedin Hz or RPM depending on the choicesmade in parameter 4-11 Motor Speed LowLimit [RPM]/parameter 4-13 Motor SpeedHigh Limit [RPM] or inparameter 4-12 Motor Speed Low Limit [Hz]/parameter 4-14 Motor Speed High Limit [Hz].29-03 Pipe Fill TimeRange: Function:0 s* [0 - 3600 s] Set the specified time for pipe filling ofhorizontal pipe systems.29-04 Pipe Fill RateRange: Function:0.001ProcessCtrlUnit*[0.001 -999999.999ProcessCtrlUnit]Specifies the filling rate inunits/second using the PIcontroller. Filling rate unitsare feedback units/second.This function is used forParameter Description Programming GuideMG20O702 Danfoss A/S © Rev. 2014-01-21 All rights reserved. 1893 3