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

Contents

3.25 Parameters 29-** Water ApplicationFunctionsThe group contains parameters used for monitoring water/wastewater applications.3.25.1 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. As the pressure in horizontal pipe systemsdoes not climb as the system fills, filling horizontal pipesystems requires a user-specified speed to fill for a user-specified time and/or until a user-specified pressuresetpoint 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 the above toensure a safe filling of any system.No matter which system, the pipe fill mode starts usingthe constant speed set in parameter 29-01 Pipe Fill Speed[RPM] until the pipe fill time in parameter 29-03 Pipe FillTime has expired. Filling then continues with the fillingramp set in parameter 29-04 Pipe Fill Rate until the fillingsetpoint specified in parameter 29-05 Filled Setpoint isreached.130BA611.10Max. speedFill speedMin. speedClosed loopNormal rampInitial rampFill time or filled setpointSpeedIllustration 3.110 Horizontal Pipe System130BA612.10Max. speedMin. speedClosed loopFill rate unit/sec.Initial rampTimeSpeedFilled setpointIllustration 3.111 Vertical Pipe System29-00 Pipe Fill EnableOption: Function:[0] * Disabled Select [1] Enabled to fill pipes at a user-specifiedrate.[1] Enabled Select [1] Enabled to fill pipes at 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 selectionmade 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 optionsselected in parameter 4-11 Motor SpeedLow Limit [RPM]/parameter 4-13 MotorSpeed High 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.Parameter Description Programming GuideMG20OB02 Danfoss A/S © 05/2018 All rights reserved. 2353 3