Hello there, I've been following this forum for a long time, but this is my first post.
Currently I all grain brew with Sanke's for my HLT and Kettle, and a 60q cooler for my MLT. I've just purchased (legally through Widmer) a 3rd Sanke to replace my MLT. I've got 1 chugger and an IC and my heat source is exclusively propane.
I'm looking to gradually move toward an electric, automated HERMS set up. I am thinking of adding a PID to monitor my Mash temp and turn on/off my chugger which will pass through a HERMS coil in my HLT.
Here is my question: How important is it to control temperature in my HLT when trying to maintain mash temp through the HERMS coil?
For example, if I don't have a PID to control the temp of my HLT and I just manually heat the HLT, does my HLT temp need to be exactly the same as my target mash temp?
Even more specifically, lets say I want to mash at 152, and my HLT is at 170 for my mash out temp, is that going to be a problem?