Davey Speedman Dual Pump Variable Speed Pump Control System - Manual (Page 47)

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When a system has been idle for a period of time there may be loss of water in the system and a need to start
the pumps slowly to reduce the possibility of Water Hammer. The Pipe Fill Control will override the SET POINT
control in these circumstances. Pipe Fill will accelerate all pumps one at a time to full speed governed by the
“Pipe Fill Time” parameter or until the “Cut In” pressure is reached.
Pipe Fill Mode
This screen will enable or disable the mode.
If Pipe Fill Mode is set to “OFF” then the next three screens (“Pipe Fill Time,
Pipe Empty Pressure and Pipe Empty Time”), will be hidden.
Jump Ramp Time
In certain situations it is necessary to accelerate the first pump faster up to a
certain speed to facilitate cooling or lubrication of bush type bearings. In this
situation the “Jump Ramp Time” defines how long the first pump takes to accelerate
to the Jump Final Speed, after the first pump has reached this speed normal pipe fill will commence.
Jump Final Speed
In certain situations it is necessary to accelerate the first pump faster up to a
certain speed to facilitate cooling or lubrication of plain bearings. In this situation
the “Jump Final Speed” set the final speed this pump will reach before normal
pipe fill commences.
Pipe Fill Time
Nominates the maximum time to fill the reticulation pipe work. The Speedman will
increase the VSD from zero to maximum frequency based on the time nominated.
The Pipe Fill Time is the time taken to accelerate EACH pump to maximum frequency.
Pipe Empty Pressure
In order for this mode to be initiated the system must have been below the Pipe
Empty Pressure for at least the Pipe Empty Time.
Pipe Empty Time
Once the “System Cut In Pressure” is reached or all available pumps are on &
running at 100% the Pipe Fill Mode will automatically cease and normal pressure
control functions will operate.
Whilst in Pipe Fill Mode the main screen will flash the message “Pipe Fill Mode” to inform the operator that
there is a control over-ride functioning.
To disengage Pipe Fill Mode select “OFF” in the first screen of this section.
Whilst in Pipe Fill Mode the Low Pressure Shutdown is disabled.
Pipe Fill Mode
======ON======
Jump Ramp Time
XXX Seconds
Jump Final Speed
XX %
Pipe Empty Press
XXXX
Pipe Empty Time
XXX Seconds
Pipe Fill Time
XXX Seconds
PIPE FILL MODE
Pipe Fill Mode selection On, Off Off
Jump Ramp Time seconds Off, 1 - 999 Off
Jump Final Speed % 0-100% 50
Pipe Fill Time seconds 5 - 999 100
Pipe Empty Pressure unitless 0 - 9999 200
Pipe Empty Time seconds 0 - 999 200