I'm an electrical engineer, working with the owner of an (old) Rancilio Z-11 Omicron 3-grouphead espresso machine and would appreciate some suggestions on resolving a problem with the steam wands.
Machine is levelled on the countertop. Boiler water level maintained about 1/3 the way down from "max" indication. Boiler pressure slightly greater than 1 bar.
Operating either the left or right steam wand BY ITSELF gives good volume and no water. If right steam wand is opened first, then the left wand is opened, the amount of water in the right steam wand increases as the left wand valve is opened further. But the left wand consistently delivers good quality steam (no water) at all times.
I'm assuming the piping for both steam wands just taps into the top of the boiler, with no dip tubes or anything--RIGHT? Any thoughts?
THANKS!!........Lee
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