ITT PumpSmart PS220, Configuration And Operation Manual

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PS220 Configuration & Operation Guide
PS220 192
Functions &
Features
Runout/Runout Control
When a pump produces flow well beyond the Best Efficiency Flow rate that it
was designed for it is referred to as Runout. The NPSHa (Net Positive Suction
Head Available) is usually less than the NPSHr (Net Positive Suction Head Re-
quired) at this operating condition which can lead to severe damage to pump
internals and the suction piping system. A conservative estimate for a runout
condition to occur is at 110-125% of the Best Efficiency Point Flow [BEP Flow].
The PumpSmart PS220’s only response when using the Advanced Protection is
to provide a warning.
The graphic depicts both Minimum Flow and Runout Flow on a typical pump
performance curve.
The Runout Control Function can be configured with the PumpSmart PS220 Configuration Wizard.
To access this Wizard from the Home Screen, follow the path: Menu>PS220 Configuration>Pump & VFD
Protection>Pump Protection>No> Yes or No>Scroll down to Runout Ctrl>