I did my first all grain batch on my new system which is a single tier RIMS and Honeywell controlled HLT. I was only able to get 66% efficiency and I think it was somehting to do with my batch sparge process.
I'm using a PICO style false bottom in my mash tun see link below:
With this false bottom I have 3 gallons of foundation water. Which is really putting me off in my calculation. This was my process for my batch sparging that day.
• Used a 1.25 to 1lb grain ratio
• Filled the mash tun with 3.25 gallons of foundation water to cover the false bottom
• Then added 3.75 gallons on top of that to achieve my water to grain ratio
o This totaled out to be 7 gallons
• Heated the 7 gallons to 154F
• Doughed in and stirred so no dough balls were there
o Let sit for 10 minutes
• Began to re-circulate at a slow rate controlling the flow back into the tun via a ball value on the outside of the RIMS Tube.
• Stirred at 30 minutes
• Stirred at 50 minutes
• Stirred at 60 minutes
• Batched out at 1 hour 10 minutes
• Drained completely including all foundation water
• NEED HELP ON THIS STEP
SECOND BATCH SPARGE
•Next I filled the Mash Tun back up but only with 4.5 gallons. So not all the grains were covered. My issue here was because of the false bottom I basically need to fill again with an extra three gallons to get coverage but I didn’t. I was confused about how this would effect the overall dilution of the sugars left in MLT in turn bringing the gravity down and giving me way more water then I needed. So my grains were fully covered with water.
• I stirred and let sit for 10 minutes
• Began re-circulating again about 10-15 minutes
• Pulled the amount needed to fill the boil kettle
I should have hit 1052 for my OG instead hit 1044. I my pre-boil gravity was 1031.
I think I have to switch to fly sparging because of the false bottom.PLEASE HELP!!!!