Hello Assume a network that has totally 150 nodes which 100 Nodes of it are FF (Fire Flow). All 150 nodes are in a same Zone (OR no Zone has been defined for all network) and ‘Use Minimum System Pressure Constraints?’ is not checked. Now FF Analysis begins to compute. According to what Mr. Dringoli says ("Residual" refers to the fire flow node) the calculator calculates constraints JUST for FF Nodes (I mean those 100 Nodes)? if it calculates constraints for JUST 100 FF Nodes, then maybe some problems (like not meeting constranits) occures for one Node which is not FF Node. What do you say for this problem? Sim
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