Xylem 19 001 251 R3 Floboy VFD Pumping System - Manual (Page 29)

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Figure 25: Speed Test
SPEED TEST : Delay is how long the controller
waits before initiating speed test (after all other
shutdown parameters are satisfied). Step delay
controls how quickly the VFD speed is reduced, to
detect 0 flow. If VFD speed reaches minimum
speed (set under PID, shown later), then the
controller will shut down the pump. Step size is
the % speed decrease for each step. To “smooth
out” speed test, set Step delay lower and step size
lower. To quicken speed test, set step delay
higher and/or step size higher.
SAFETY :
Figure 26: Safety
The safety functions are controlled in this screen.
Delay controls how long the safety will take to time
out. Set point for Low Pressure and high pressure
are in gage values and not in reference to set
point. Low Pressure override is also found in the
safety menu.
Figure 27: Safety, Others
Inlet water faults are controlled under “Others”.
Short times should be used as these faults can
cause serious damage if the timers are set too
long. 5 seconds is all that is required. High Pump
Temp is also controlled here. The delay is how
long between a high pump temp signal and the
pump is shut down. 5 seconds is all that is
required. The Hold off time controls how long the
pump must run before the HPT is honored. This
prevents exposed inlet piping from causing a HPT
safety on startup due to solar heating of the water
in the pipe.
Figure 28: Panel Configuration
PANEL CONFIG : Used to set screen contrast and
time/date in the controller.
SYS CONFIG (Password required, technician
access only):
PID PARAMETERS , pump configuration and other
factory/technician access parameters are
configured here.
OTHER SETTINGS (Password required, technician
access only): Safeties and other control features
are controlled here.