Davey Speedman Dual Pump Variable Speed Pump Control System - Manual (Page 45)

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No Flow
If the system detects that there should be flow but there is a No Flow signal from an
external flow switch, the Speedman will display the message “Low Flow Detected”.
Once system detects a closed contact on this input the Speedman will time out and
shut down. This is optional and requires a flow switch to feedback into the No Flow Input and will only operate
if there is at least 1 pump selected to AUTO.
The system will only shut down if the system pressure is lower that the set point. Speedman assumes that if
pressure is at set point then the system is in standard operation mode.
Once the No Flow Delay Timer has expired then the screen message changes
to:
The system pressure at the time of shutdown is displayed on this screen also. The system will not restart until
ENTER is pressed to clear the fault.
Aux Inputs 1, 2 and 3
Any input can be set to be an auxiliary input. Setting an input to become an auxiliary input allows the
Speedman to use this input to turn on a Digital Output. To do this the output has to be set up to be an Auxiliary
output. There are three auxiliary functions available.
Aux Input 1 operates Aux Output 1
Aux Input 2 operates Aux Output 2
Aux Input 2 operates Aux Output 3
Pump 1 & 2 Fault(Stop)
The Speedman has the capability to assign an input for each pump to allow
for individual pump fault protection. In the event of a pump going into a fault
condition the input for that pump should close. This will shut down the pump after the time set by the Pump
Fault Input Delay Timer (In Timing Menu).
The pump will not be available until the fault has been reset by the operator on the status screen.
Flow Pulse
When the input is programmed to this mode a digital output flow meter can be connected. Volume per pulse
information need to be entered and then the actual flow can be displayed and logged on the Speedman.
Low Level Pause
An external sensor can be used to Low Level Pause the system. When the
system receives a Low Level Pause command the system will shut down in a
controlled manner based on the rates set in the response rates menu.
The system will slowly drop the pressure causing all pumps running to turn off one at a time and a message
will be shown on the main screen.
After the Low Level Pause input has been deactivated the system will restart under normal operations. If the
Auto-rotation is selected to FULL the lead pump will rotate.
External contacts must be VOLTAGE FREE - any applied voltage can cause damage to the system. The
Speedman will supply a control voltage to the external contact.
Low Flow Detected
XXXXX
No Flow Shutdown
XXXXX
Program Input X
PX Fault (Stop)
Paused Low Level
XXX