QM67 Dual Boiler Espresso Machine
Page 9
changed to match the coffee blend you are using and to bring out the different flavor
characteristics in the coffee. A hotter temperature will bring out more of the bittersweet
chocolate flavors and going colder will bring out more of the fruity flavors. Going too hot may
cause the shot to taste bitter and going too cold it may taste sour. Experiment with different
temperatures until you find the one you like best.
Steam Boiler Temperature - The steam boiler temperature has been set to 263° by default
which is approximately 1.7 bars of steam pressure. The pressure may vary slightly at different
elevations. This setting should never be changed unless the machine is at a higher elevation
and the pressure exceeds 2 bar in which case the temperature should be reduced by a few
degrees so it does not exceed 1.8 bar.
Advanced PID Settings
Warning - This section allows the user to
change the machine from Fahrenheit to
Celsius mode as well as other advanced
settings that can greatly affect the
performance of the machine. These
settings have been calibrated using
specialized test equipment and should not
be changed unless the user has a thorough
understanding of how a PID controller operates.
To get into the advanced programming mode, with the machine turned off hold down both arrow
keys and then turn the machine on. Keep holding the arrow keys until the display reads F.01
and then release the keys.
Use the down arrow key to cycle through parameters and then use the up arrow key to select a
parameter to change. Then use the arrow keys to change the selected parameter.
To save the new changes turn the machine
off and then back on again.
F.02 Mode Setting - By default the F.02 setting has been set to 4 to give priority to the coffee
boiler. The setting can also be set to 5 to give priority to the steam boiler. This can be helpful if
you are steaming larger quantities of milk and desire more steam capacity. If you change the
F.02 setting to 5 to give priority to the steam boiler then both power switches must be on for the
machine to operate or neither boiler will heat up.
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