ethorson wrote:I have a Bezzera BZ35, which is similar to the Livia 90 (also made by Bezzera). Both of these HX machines do not have a thermosyphon to heat the group. Instead they use a thick chunk of brass to conduct heat from the boiler to the group. I have found that the group on my machine is very slow to warm up, runs a little cool, and actually needs a very short heating flush rather than a long cooling flush. The heat exchanger volume is also very small and is rapidly filled with cold water if you flush too long. I performed some temperature tests using a portafilter thermocouple and found that a two second flush followed immediately with the shot seemed to deliver the best temperature stability.

Hey ethorson does your bz99 cycle (orange light comes on) often, like after a couple of shots?

Does the BZ 35 come standard with preinfusion or did you achieve preinfusion by add the electronic pressure controller?