JahLaza
I’ve found that the high pressure start comes with first “pull” or activation of the machine after a long rest like overnight or an hour. The second activation seems normal at the preset pressures. My for now solution is to start the machine for it to get this initial pressure ramp out of the way, THEN insert the tamped portafilter and activate the machine. THis way we run our regular four doubles over about thirty or forty minutes in the morning.
I have not messed with the pump speeds. Maybe six months ago I fiddled with the heat exchange to put it in ECO mode to reduce our electricity usage but this hi pressure ramp start is a more recent behavior.
P2: 8s at 2.2 bar, 32 sec at 6.2 bar, 4 sec at 5 bar.
P5 is 90 sec at 9bar. Still has cranked up ramp.
In the video the machines first run of the day without a portafilter shows this high ramp then settles to pressure setting. At 50 seconds a loaded portafilter runs at P2 settings pretty normally. The video shows that the hi pressure ramp occurs without any resistance from the puck.
Vesuvius Pressure ramp
