aeviaanah
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I agree with you and crane, having each element on SSR is probably overkill. I didnt realize crane was suggesting having one phase go through SSR and the others through contactors, I have no clue how to split the phases up- this is a beyond my understanding. What do you think about having (1) 3phase element controlled with hysteresis (use on offset to limit contactor firing) the other (2) elements simply on/off to get to setpoint?Turning inductive loads on and off rapidly can produce a spark across the contacts thus causing EMI.
Depends, you could as @crane mentions above try PID controling 1 phase thru an SSR and manually switch the other 2 phases (from relay) for quick heating to just below target temp then switch 2 phases off and let the PID take the remaining phase to target. As mentioned 6 SSR's may be overkill but not sure there would be any advantage to achieving target temps since you would be dealing a large mass of heated water/wort almost at the setpoint.
I see this setup a bit underkill for controlling mash due to the typical desire to nail temperatures over time but this will be in HLT and Kettle. We are single infusion no mashout in our infancy as we wont be recirculating mash through HERMS or RIMS.
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