Danfoss VLT AQUA Drive FC 202 Programming Guide

3.25 Parameters 29-** Water Application
Functions
The group contains parameters used for monitoring water/
wastewater applications.
3.25.1 29-0* Pipe Fill function
In water supply systems, water hammering can occur when
lling the pipes too fast. It is therefore desirable to limit
the lling rate. Pipe ll mode eliminates the occurrence of
water hammering associated with the rapid exhausting of
air from the piping system by lling the pipes at a low
rate.
This function is used in horizontal, vertical, and mixed
piping systems. As the pressure in horizontal pipe systems
does not climb as the system lls, lling horizontal pipe
systems requires a user-specied speed to ll for a user-
specied time and/or until a user-specied pressure
setpoint is reached.
The best way to ll a vertical pipe system is to use the PID
function to ramp the pressure at a user-specied rate
between the motor speed low limit and a user-specied
pressure.
The pipe ll function uses a combination of the above to
ensure a safe lling of any system.
No matter which system, the pipe ll mode starts using
the constant speed set in parameter 29-01 Pipe Fill Speed
[RPM] until the pipe ll time in parameter 29-03 Pipe Fill
Time has expired. Filling then continues with the lling
ramp set in parameter 29-04 Pipe Fill Rate until the lling
setpoint specied in parameter 29-05 Filled Setpoint is
reached.
130BA611.10
Max. speed
Fill speed
Min. speed
Closed loop
Normal ramp
Initial ramp
Fill time or lled setpoint
Speed
Illustration 3.110 Horizontal Pipe System
130BA612.10
Max. speed
Min. speed
Closed loop
Fill rate unit/sec.
Initial ramp
Time
Speed
Filled setpoint
Illustration 3.111 Vertical Pipe System
29-00 Pipe Fill Enable
Option: Function:
[0] * Disabled Select [1] Enabled to ll pipes at a user-specied
rate.
[1] Enabled Select [1] Enabled to ll pipes at a user-specied
rate.
29-01 Pipe Fill Speed [RPM]
Range: Function:
Size
related*
[ par.
4-11 -
par. 4-13
RPM]
Set the lling speed for lling horizontal
pipe systems. The speed can be selected
in Hz or RPM depending on the selection
made in parameter 4-11 Motor Speed Low
Limit [RPM]/parameter 4-13 Motor Speed
High Limit [RPM] or in
parameter 4-12 Motor Speed Low Limit [Hz]/
parameter 4-14 Motor Speed High Limit [Hz].
29-02 Pipe Fill Speed [Hz]
Range: Function:
Size
related*
[ par.
4-12 -
par. 4-14
Hz]
Set the lling speed for lling horizontal
pipe systems. The speed can be selected
in Hz or RPM depending on the options
selected in parameter 4-11 Motor Speed
Low Limit [RPM]/parameter 4-13 Motor
Speed High Limit [RPM] or in
parameter 4-12 Motor Speed Low Limit [Hz]/
parameter 4-14 Motor Speed High Limit [Hz].
29-03 Pipe Fill Time
Range: Function:
0 s* [0 - 3600 s] Set the specied time for pipe lling of
horizontal pipe systems.
Parameter Description Programming Guide
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Danfoss VLT AQUA Drive FC 202 Specifications

General

Brand	Danfoss
Model	VLT AQUA Drive FC 202
Category	DC Drives
Language	English