ITT PumpSmart PS220, Руководство по конфигурации и эксплуатации

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PS220 Configuration & Operation Guide
PS220 182
Functions &
Features
Dry Run factor Adjustment (Not a step)
The Dry Run factor is for “fine tuning” the Dry Run fault feature. It should only be adjusted during initial commissioning to
test the Dry Run Response function. Normally this parameter requires no adjustment. When adjustment may be required
this value should only be changed in increments of 1/100th at a time.
6. Configure Runout Flow Response
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 Required) 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.
This graphic depicts both the Minimum Flow and Runout Flow on a pump performance curve.