12
Vibration Pump Machines
Note: Set the brew pressure when the machine is cold to prevent
accidental burns.
We set up the pump to obtain a brew pressure of 9 Bars, with a flow of
approximately 2 ounces in 25 seconds. To set the brew pressure, insert a
backflush disc into the portafilter and place it into the brew group. Then,
raise the lever on the brew group to turn on the pump. You can now adjust
the OPV to obtain 10 Bars on the gauge. Turn the adjustment screw
clockwise to raise the pressure and counter clockwise to lower the pressure.
The OPV is located through the ½” hole, behind the drip tray. Make sure
you put the drip tray back in place before you lower the lever on the brew
group or water will blow out onto your counter.
Look in the hole and locate the brass
adjustment screw before you insert the
screw driver.
