KELCO E30 - Stop Pressure Settings; High Pressure Run-On Feature; High Pressure Limit Setting

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STOP PRESSURE Mode 1
The stop pressure is the pressure at which the E30 will shut down the
pump in normal operation. It must be set to some value that is higher than
start and trip pressures. The range of adjustment is 0 to 2000 kPa or 0 to
290 psi in increments of 1 kPa or 1 psi. If you attempt to set the stop
pressure to a value that is less than the start or trip pressures you will
invoke a warning message from the E30 to check your pressure settings.
HIGH PRESSURE RUN-ON Mode 1
If you set high pressure run-on to “YES” (ON) the question that follows
asks you to enter a time limit that the pump can operate above the normal
stop pressure. When operating a high volume centrifugal pump that
exhibits a relatively small pressure change across a wide range of fl ow (a
fl at Q-H curve) the high pressure run-on can prevent the pump from cycling
on and off on a low draw off by establishing a high pressure zone rather
than a fi xed stopping pressure. Within the defi ned pressure zone and for
a limited time the pump can be allowed to continue to run thus preventing
the pump from cycling on and off on a low discharge fl ow.
WARNING: Never apply this function to a helical rotor pump or to any
positive displacement pump. Helical rotor pumps and PD pumps in
general may be damaged by incorrect application of this function.
Take great care in using the high pressure run-on and its associated
settings. Always set the high pressure limit to a pressure that is well
below the pumps shut off head. Keep the high pressure run-on time
to a minimum to avoid overheating the pump due to recirculation.
HIGH PRESSURE RUN-ON (Time)
If you previously set high pressure run-on to YES (ON), the question that
follows asks you to set a run-on time. The time can be set from 0 to 900
seconds. The time you set will be the maximum time the pump can operate
for above its normal stop pressure. The high pressure run-on timer is self
terminating and terminates its run if pressure drops below the normal stop
pressure.
HIGH PRESSURE LIMIT
The high pressure limit is the absolute highest pressure the system can