Manual

123
DXi User Manual
Appendix D: Setting Up a FLOW MAX System
Flow Max allows any participant controller to utilize a shared device. When a Flow
Max participant program reaches its "Start Time," the Submaster initiates a command
to turn the device on. The device will remain on provided there is at least one
program running that has been set up to share the use of the device.
Shared devices may be connected to any Flow Max participant controller. Each device
connection is made to one and only one controller. All other participant controllers
that share the use of the device must be programmed at the respective controller to
select the appropriate option.
The Master Valve, Pump, and Flow Meter devices are physically connected to the
respective controller Master Valve Power Board. Flow Meter installation instructions
are included with the optional Flow Sensor kit.
Flow Sensors
Flow sensor operation must include the calibration factors of "K" and "Offset"
values for accurate calculations. These values are required to compensate for the
differences between pipe size and flow sensor used. Complete tables on K and Offset
values are given in Appendix B: Flow Meters.
The satellite controllers that are physically connected to flow sensors must have the
"K" and "OFFSET" values for the particular flow sensor programmed.
Each point of connection for a MV, Pump or Flow Sensor must be defined at the
controller it's connected too. The selection is made under menu Setup -> FLowmax,
"devices connected to this clock".
Flow Check Delay
The Flow Check Delay provides a specified amount of time before any limit
comparisons or corrective action is taken by the system. This allows water lines and
pressures to stabilize after station turn on and turn off transitions.
The system has the default flow check delay of two minutes.
When a station turns on, flow measurement begins immediately; however, the limits
will not be checked or reacted upon until the first reading after the flow check delay
has completed. Keep in mind, that the more station transitions that occur within the
group of Flow Max participants, the more limits will go un-checked.
Main Line Limits
For any number of controllers within a Flow Max group, there will only be one Main
Flow Limit. Remember that the main flow limit must be higher than an expected flow
FLOWMAX Participant
Devices Connected to this Clock:
Pumps: 1 2
Master Valves: 1 2 3
Flow Sensors: 1 2 3
Setup FLOWMAX WED 5:43:40 PM