OK, approaching two weeks of ownership of the Pro 600 and time for the first chemical backflush. What I find perplexing is the variation in advice on how to do a proper backflush.
I use Cafetto Evo detergent which advises five 10 second intervals during the detergent phase ie 10 seconds on, 10 seconds off followed by ten cycles of 5sec/2second to rinse.
When I used the original Cafetto, it advised 5 second intervals.
Jetblack's warranty leaflet instructions advise 3 cycles of on for 5 secs/off for 30 secs which I'm guessing would follow the advice for the Clean Machine backflush detergent that it recommends.
However the Pro 600 manual advises 20 seconds on and 30 seconds off, moving the brew lever to the mid-position between cycles. Profitec's advice goes like this:
5. Operate the group lever for approx. 20 seconds. The blind filter will fill with water.So which method is preferable? Commonsense suggests the EVO instructions but I wonder whether this applies to commercial machines rather than prosumer ones. I don't want to overdo it.
6. Let the detergent react, moving the group lever into the middle position, approx. 45°. (Do not move it into
the lower position.)
7. Move the lever into the lower position after approx. half a minute. This way, the fats and oils can be
discharged by the infusion cylinder.
8. Repeat points 5-7 until only clear water is discharged by the infusion cylinder.
I've never heard about using the brew lever mid-position before but a bit of reading on other forums indicates that others recommend this as well.