10
5. Brew Pressure Adjustments
Rotary Pump
CAUTION: Adjusting the pump pressure can be time consuming and since it is very
close to the electrical connection on the boiler, we recommend that all adjustment are
done when the machine is not plugged in.
Note: We recommend that the Rotary pump be set to 9 Bars with the back flush disc
in place. The OPV should be set to open at 11 Bars.
Adjusting the Pump Pressure:
Adjust the pump pressure by loosening the lock nut then
turning the adjustment screw. Turn the adjustment screw clockwise to raise the pressure
and counter clockwise to lower the pressure.
Setting the Brew Pressure:
Turn the adjustment screw counter clockwise to lower the
pressure and clockwise to raise it. Between adjustments, lower the lever on the brew
group to release the pressure. Make your adjustment with the machine unplugged and
then plug it in and test your setting. When you have the pressure adjusted, tighten the
lock while holding the adjustment screw in place or it may turn and change the setting.
Setting the OPV:
We set this before your machine has shipped. To set the OPV, you
will have to run the machine with the backflush disc in place. First, raise the brew
pressure to 11 Bars. Then, with the pump running, turn the adjustment screw on the OPV
so that it just starts to let water flow out of the overflow tube. It is now set to open at 11
Bars.
View of Rotary Pump
