Re: Ducting for recirc fan
Today I manually control the fan with a switch and usually only turn it on once the powder has flowed. I was looking at the pid manual and I'm thinking you could automate this setup using the alarm contacts. I think you could set the alarm parameters such that the fan would kick on when the temperature reached a specified level, say 200 degrees.
I might look at trying this with my oven and post the results.
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