Have to agree with the dedicated fridge. How ever transfers are easy when done right. You need to conect both liquid and gas post of the kegs together, the recieving keg lower, both at equal pressure, pull the relief valve of the recieving keg just till you have flow, gravity will complete the transfer, remove liquid connection when recieving keg is full or as filled as required. This method should create little to no foam and will retain carb in both kegs.
Hey moad, really interested in getting something like this set up on my kegerator. How difficult for a non-IT person to build? Also I was thinking of adding in pressure sensors so I can confirm what pressure each keg is at, not sure how easy that would be to do though?
Each flow sensor requires an interrupt circuit, each pressure sensor also requires an interrupt circuit, so an arduino could only handle I think 6 taps with flowmeters or 6 pressure sensors or three with both.
Volume of the mash is not really relavent. Flow rate is what you need to know there is no point throwing 10000w at 7lpm. Find out what your max flow rate is without compacting the bed. The bigger trick here is finding a brewing pump to do the job. (Skip anything american made to run at 60hz ). The heating equation then works out at max flowrate heated to biggest temp step. We do mashes of this size at swap meets. However these systems are pieced togeather on the day and we are limited by power available. And the equipment usually used in smaller home brew systems. So a march 815 just won't cut the mustard, on a 200l+ mash unless your happy with 2 hour ramps.