I had created a separate Maxi-BIAB Mash Profile, but I think I've worked out how to get it to work with the standard BIAB profiles
This is an equipment profile for my Maxi-BIAB 50L pot.
I fill 2 17L cubes of wort (34L), which I dilute to about 42.4L, which gives me a double batch, ie 38L of Beer
I have a 49L mash limit, and a 40.2 L boil limit
To scale any recipe to Maxi-BIAB, open the recipe, then press the scale recipe and select a Maxi-BIAB equipment profile.
Then select a BIAB Mash profile
Then go to the "Water Volumes" page
You will probably see that your "Mash Volume Needed" is red dotted, as is your "Mash Tun Volume"
The solution is simple. Modify the "Kettle Top Up" field so that you are taking away some of your Mash Volume so that your Mash Volume is less than your Mash Tun Volume!
Simple
Now,
The "Tot Mash Water" is your Dough-In Volume, remember to reserve some water so that you can add it back to make Dough-in easier
The "Est Boil Vol" is your Start Of Boil Volume, and you should add sparge water or water to your kettle to achieve this after mashout
The "Post Boil Vol" is your Target End Of Boil Volume, and you should add sparge water or boiling water through out the boil to achieve this
Rather than relying on the fermenter dilution volumes, its better to use a Dilution Scaler tool to actually work out the correct volume of post-boil dilution water required.
Now, the only other real trick is to create Maxi-BIAB profiles which suit your equipment. The Maxi-BIAB Calculator can help with that.
