I'm making a large beer. BS automatically has to drain the tun before sparge because of the large grist and large amount of mash water. What I don't understand is why BS displays two different amounts depending on in the drain mash tun box is checked? Also, why does it display it:
"Batch sparge with 2 steps (drain mash tun, , 3.35gal)".
Why not drain mash tun, 3.35 gallons?
Here are my numbers:
Grain: 19.25 lbs
mash water: 5.75 gallons
grain absorption: 2.31 gallons
mash tun deadspace: .25 gallons
calculated preboil: 6.46 gallons
When draining, I expect 3.3 gallons of wort...roughly 1/2 my preboil volume. The issue I have is with the sparge step. If the drain check box is not checked the sparge step has 3.35 gallons. When checked, 3.27 gallons. 6.46-3.3 = 3.16 gallons which is what I need. Accounting for 1/2 the deadspace I would expect the sparge step to be 3.29 gallons. If the check box is checked the volumes seem correct. I believe there is an issue when BS automatically calculates that a drain of the mash tun is needed. In that case make sure the check box is checked.
Mark
"Batch sparge with 2 steps (drain mash tun, , 3.35gal)".
Why not drain mash tun, 3.35 gallons?
Here are my numbers:
Grain: 19.25 lbs
mash water: 5.75 gallons
grain absorption: 2.31 gallons
mash tun deadspace: .25 gallons
calculated preboil: 6.46 gallons
When draining, I expect 3.3 gallons of wort...roughly 1/2 my preboil volume. The issue I have is with the sparge step. If the drain check box is not checked the sparge step has 3.35 gallons. When checked, 3.27 gallons. 6.46-3.3 = 3.16 gallons which is what I need. Accounting for 1/2 the deadspace I would expect the sparge step to be 3.29 gallons. If the check box is checked the volumes seem correct. I believe there is an issue when BS automatically calculates that a drain of the mash tun is needed. In that case make sure the check box is checked.
Mark