Will try my first automated overnight mash with RAPT. Thoughts?

[kohalajohn]

The plan is:

In the evening dough into cold water. The profile then starts and runs a 66c mash for one hour.

Then the next step is a 77c mashout for ten minutes.

Then the next step is to drop down to 55c for ten hours, overnight.

The reason for the 55c instead of back to 66c is to minimize electricity and evaporation. I've already mashed, so I don't need the 66c any more.

And if the mashout denatured the beta amylase enzymes, I should not have to worry about being below 66c

And I picked 55c as that should be just above what airborn bacteria could survive in.

Finally, I plan to find a way to have the pump turn off after the mashout. I don't think I need the pump running during the waiting period, overnight.

Your thoughts appreciated.

 

[AzOr]

It looks like a good plan.
However, in the future you could mash and sparge in the evening, then set your equipment to boil in the morning. I do all my batches this way as it allows for more time w family.
I have an Anvil Foundry and my wort sits overnight at usually 140f. I may have to top off about a quart or so in the morning.
I do a mash out before turning off my aio at night but I’m not sure that’s even necessary.
Next morning all I do is add hops and continue w my 60 min boil then spend an hour or two cleaning and wandering around my garage trying to look productive.
Apologies for getting off topic but just wanted to present an alternative.

 

[kohalajohn]

That's interesting. I can see how both would work. It's just a choice about whether you want to lift out the grain bed in the evening or the morning.

I'm not aware of any advantages or disadvantages to keeping the grains in the mash overnight.

 

[AzOr]

Yup. My Anvil (120v) is painfully slow so spargimg the night before means I can program it to boil when I wake up. I also put the grain basket in a bucket and in the morning it’s nice and cool so I can dump in the compost.

 

[kohalajohn]

Yeah, that is the advantage of of removing the grain in the evening. You can automate the start of the boil in the morning. Then just get alerts about hop additions.

I want to go down to the brewery in the evening anyway, as I want to turn off the pump. I don't want to worry during the night about the recirc arm coming loose. So I might as well pull the grain at that time.