I have found a bunch of how to build HERMs systems examples but the actual operation of the HERMs system is still not clear. The thread "How do PID's/SSR's work?" made HERMs operation more clear but created a new question.
At the end of the mash the HLT temp needs to rise for sparging. That takes time. When that happens is the pump shut off to stop recirculation or do you let the mash temp rise along with the HLT? If the mash continues to recirulate through the HEX during HLT temperature rise wouldn't that significantly slow the rate of heating the HLT as now the HLT heat source would be effectively heating 2 separate vessels?
At the end of the mash the HLT temp needs to rise for sparging. That takes time. When that happens is the pump shut off to stop recirculation or do you let the mash temp rise along with the HLT? If the mash continues to recirulate through the HEX during HLT temperature rise wouldn't that significantly slow the rate of heating the HLT as now the HLT heat source would be effectively heating 2 separate vessels?