Step 8 : Pressure control
Pressure control is achieved by ‘dimming’ your pump. For example you can start your shot with 50% pressure ramping up in 10 seconds to 90% pressure.
Unfortunately in a Rancilio Silvia the NEUTRAL side of the pump and valve are switched with the same wire. To achieve individual control of the pump and valve we need to provide the valve permanent NEUTRAL.
Note: this is the archived installation manual for the legacy version of meCoffee shipped before July 1st, 2017.
This feature requires Active PID to be wired.
Remove the sheet of metal behind the brewhead exposing the valve. Remove the white wire from the valve. This wire remains not connected.
Use the long white wire from the set to connect this terminal to the NEUTRAL(left) side of the power-button. For the Silvia E model, you connect the wire to the lower left terminal of the brew button.
Definition of success
When pressing the brew-button water flows from the group-head. You are able to tune the pressure-control settings.