In water supply systems water hammering can occur when filling the pipes too fast. It is therefore desirable to limit the filling rate. Pipe Fill Mode eliminates

the occurrence of water hammering associated with the rapid exhausting of air from the piping system by filling the pipes at a low rate.

This function is used in horizontal, vertical and mixed piping systems. Due to the fact that the pressure in horizontal pipe systems does not climb as the

system fills, filling horizontal pipe systems requires a user specified speed to fill, for a user specified time and/or until a user specified pressure set-point

is reached.

The best way to fill a vertical pipe system is to use the PID function to ramp the pressure at a user specified rate between the motor speed low limit and

a user specified pressure.

The Pipe Fill function uses a combination of above to ensure a safe filling in any system.

No matter which system - the pipe fill-mode will start using the constant speed set in par. 29-01 until the pipe fill-time in par. 29-03 has expired, thereafter

filling will continue with the filling ramp set in par. 29-04 until the filling set-point specified in par. 29-05 is reached.

Illustration 2.9: Horizontal Pipe System

Illustration 2.10: Vertical Pipe System

29-00 Pipe Fill Enable

Option:

[0] *

Disabled

[1]

Enabled

Function:

Select Enabled to fill pipes at a user specified rate.

Select Enabled to fill pipes with a user specified rate.