Hooah wrote:One time towards the end of a pull while steaming the autofill kicked on and boiler pressure dropped to almost nothing.
FWIW, I was curious about the autofill logic on this machine and did a little informal testing, and figured I should report what I found.
On my Rocket Giotto Evo V2 with the Rocket/Pro.El.inD controller, it appears that the autofill does not kick in while the brew lever is up. If I run a long 'brew' against a backflush filter and open the hot water wand, once the water in the boiler drops to where an autofill would normally occur, the controller switches off the element, but does not open the fill solenoid while the brew lever is up. After I drop the brew lever, then the autofill starts and the boiler pressure drops as the cool water comes in.
In normal operation, if you were to steam and brew when the boiler was low enough to call for an autofill during steaming/brewing, you would see normal brew pressure throughout the shot, but might notice a continued gradual drop in boiler pressure because of the heating element being shut off and not generating new steam. Then after dropping the brew lever you would notice the pump continuing with the autofill and the boiler pressure would dive, just as Hooah observed.