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I am getting a user notification that says "More than one VSPB cannotcontrol the same control node". I'm following all the rules for variablespeed pumps, what am I doing wrong?Problem ID#: 67011
It's likely that a regular pump set up as a VSP was meant to be used here instead of a VSPB. VSP's are setup using theregular pump element of which you will just set the properties of thiselement to variable speed pump. You do this by changing the "Is variablespeed pump?" field to 'True' and then setting up your pump. VSPB's arethe element that looks like a pump with a square around it. A VariableSpeed Pump Battery element represents multiple variable speed pumps thatmeet the following criteria:1) the VSPs are parallel with each other (not in-line)2) the VSPs are sharing common upstream (inflow) and downstream(outflow) nodes3) the VSPs are identical (have the same pump definition)4) the VSPs are controlled by the same target node and the same targethead.Parallel variable speed pumps (VSPs) are operated as one group and ledby a single VSP, called the lead VSP, while the other VSPs at thesame battery are referred as to as lag VSPs. A lag VSP turns on andoperates at the same speed as the lead VSP when the lead VSP is not ableto meet the target head.From the standpoint of input data, Variable Speed Pump Batteries aretreated exactly the same as single pump element that is defined as avariable speed pump of the Fixed Head Type with one exception; numberof Lag Pumps must be defined in the Lag Pump Count field.