Davey Speedman Dual Pump Variable Speed Pump Control System - Manual (Page 53)

53
Standby (Sleep) Methods
The Speedman tests for flow rate continuously and will determine if the pump system is contributing to the
system flow.
The Speedman uses one of three methods to determine if there is no flow in the reticulation. The options
detailed below are selected via the “Standby Test” screen, which is in the CONFIGURE menu.
Each test is only carried out if there is only 1 pump running, it’s not at maximum speed and the system
pressure is at or above 3% of the Set Point.
Boost: The Speedman tests to see if the system flow has stopped by boosting the system pressure. The
“Standby Boost” pressure sets the amount the Set Point pressure is boosted by. The time that it takes to drop
back to the Set Point is compared to the Standby Test time. If the time to return to Set Point is less than the
“Standby Test” time then the system continues to operate.
In this mode the “Standby Boost” screen will be visible and “Standby Flow/Sec” will be hidden.
Flow Switch: If a flow switch closes the contact between the No Flow input then the system assumes that
there is no flow and shuts down after the period nominated by the standby test time.
In this mode both the “Standby Boost” and “Standby Flow/Sec” screens will be hidden.
Flow Rate: If the flow rate in the system is below the nominated amount in this
menu for the period of the standby test time the system will shut down.
In this mode the “Standby Flow Min” screen will be
visible and “Standby Boost” will be hidden.