Davey Speedman Dual Pump Variable Speed Pump Control System - Manual (Page 23)

23
Low Pressure Shutdown
Low pressure Alarm. If any pump is running and the system falls below this pressure
& remains there for the period of the “Lo Pressure Delay” time (Set in the TIMING Menu), the system will then
shut down.
Lo Press Shutdown can be ether a fixed pressure or relative pressure calculated from the current Set Point.
To toggle between fixed and relative, press both up and down. When Lo Press Shutdown is relative, the value
is a percentage of the current set point. In relative mode a calculated pressure value (based off set point 1) is
displayed in brackets on the right of the display).
A fault message will show on the main screen showing that there is a low pressure
shutdown fault. The fault is also recorded in the FAULT HISTORY.
To clear the fault and restart the system press the ENTER key.
NOTE: All pumps will be shut down including manual pumps.
Cut In Pressure
When the system pressure falls below the “Cut In Pressure” the system will restart.
This pressure must be higher than the Low Pressure Shutdown and lower than 99.9%.
On the right of the display a value in brackets indicates the calculated pressure based on set point 1.
Set point
The Set Point is the pressure that the system will maintain. This set point is
unit-less and is determined by the operator and the setting of the pressure transducer.
This setting is limited to a value that is lower than the High Pressure Limit.
LoPress Shutdown
XXXX
LO PRESS
SHUTDOWN
Set Point
XXXX
Cut In Pressure
XXX.XX% (XXXX)
SETTINGS
Low Pressure Shutdown Units or % 0.0% Cut In Pressure 50.0%
Cut In Pressure % of Setpoint Low Pressure Shutdown to 99.9% 75.0%
Set Point Unitless 0 - 9999 300
High Pressure Limit % of Setpoint 100.1% to High Pressure Shutdown 150.0%
High Pressure
Shutdown
% of Setpoint High Pressure Limit- 300.0% 200.0%
Pump Flow Rate /Sec 0 - 9999, Flow Meter 99
Friction Loss Unitless 0 - 999 0
Set Point 2 Unitless 0 - 9999 400
Set Point 3 Unitless 0 - 9999 400
Set Point 4 Unitless 0 - 9999 400
Set Point 5 Unitless 0 - 9999 400
Set Point 6 Unitless 0 - 9999 400
Set Point 7 Unitless 0 - 9999 400
Set Point 8 Unitless 0 - 9999 400
Pressure Trip 1 Low Unitless 0 - 9999 100
Pressure Trip 1 High Unitless 0 - 9999 200
Pressure Trip 2 Low Unitless 0 - 9999 500
Pressure Trip 2 High Unitless 0 - 9999 600
Flow Trip Low /Sec 0 - 9999 100
Flow Trip High /Sec 0 - 9999 200