Temperature and Pressure Adjustments
Machines ship from ESI with the coffee boiler thermostat adjusted to heat and brew water for
espresso at 197 degrees Fahrenheit or 92 degrees Celsius. If you prefer to adjust the tempera-
ture to fit your coffee roast perform the following:
* Make certain that the machine is at operating temperature and that the coffee boiler
heating indicator light is off.
* Remove the top cover from the machine and locate the thermostat between the groups.
* Turn the main switch to the OFF position.
* Using a long insulated screwdriver adjust the thermostat clockwise to increase tempera
ture and counter-clockwise to lower temperature.
* This adjustment is very sensitive and only slight adjustments should be made. Each 1/4
turn represents a 3 degree Fahrenheit temperature change.
*Turn the main switch back to the RUN position.
If your steam pressure gauge does not read 1.2 bar, adjust the pressure switch as follows:
*Turn the main switch to the OFF position.
* Remove the top panel of the machine.
* Locate the pressure switch in the back, top, left-hand corner of the machine.
* For machines equipped with Sirai pressure switches (Rectangular switch approximately
2” x 4”), remove the screw and lift cover from pressure switch to access the adjust
ment screw. There will be arrows pointing towards - and +. Turn towards - to lower
the steam pressure and turn t to raise steam pressure.
* For machines equipped with Giemme pressure switches (Round switch approximately
1-1/4 in diameter), locate the samll adjustment screw in the center of the switch
and adjust very delicately towards - to decrease the presure and + to increase the
presure.
*Turn the main switch back to the RUN position.
