Pressure Gauge .......................................................................... 5-13
Heating Elements ........................................................................ 5-13
Pressure Relief Valve .................................................................. 5-13
High Temperature Limit Switch ................................................... 5-13
Steam Valves .............................................................................. 5-14
Left Steam Valve ......................................................................... 5-14
Center Steam Valve .................................................................... 5-15
Right Steam Valve ....................................................................... 5-15
Air Purge Process ....................................................................... 5-15
Captive Water Purge System ...................................................... 5-15
Draining the Steam Tank ............................................................. 5-15
Section 6 :: Coffee System ......................................................................... 6-1
The Coffee System ............................................................................................. 6-2
Espresso Path ............................................................................... 6-2
Grinders .............................................................................................................. 6-3
Double Grinder Assembly ............................................................. 6-3
Calibration: Espresso Grind .......................................................... 6-4
Grinder Adjustment Panel ............................................................. 6-4
Grinder Adjustment Diagram ......................................................... 6-5
Measuring the Coffee Powder Dose ............................................. 6-5
Coffee Powder Channel ................................................................ 6-6
Removing the Grinder ................................................................... 6-6
Replacing the Grinder Burrs/Blades .............................................. 6-7
Setting the Grinder Adjustment Indicator to Mid-Scale ................. 6-7
Bean Hoppers ..................................................................................................... 6-8
Filling a Bean Hopper .................................................................... 6-8
Inserting the Hopper Stopper ........................................................ 6-8
Removing a Bean Hopper ............................................................. 6-8
Brew Group ......................................................................................................... 6-9
Brew Group Initialization ............................................................. 6-10
Brew Group Components ................................................................................. 6-10
Hall-Effect Sensors ...................................................................... 6-11
Left Piston.................................................................................... 6-12
Right Piston ................................................................................. 6-12
Piston Movement ......................................................................... 6-12
Viewing the Left Piston Movement .............................................. 6-13
Removing the Left Piston ............................................................ 6-13
Removing the Right Piston .......................................................... 6-14
Gearbox Removal and Installation .................................................................... 6-15
Removing the Gearbox ............................................................... 6-15
Installing the Gearbox ................................................................. 6-16
Section 7 :: Milk System and Refrigeration Unit ...................................... 7-1
The Milk Delivery System ................................................................................... 7-2
Milk Delivery System Components ..................................................................... 7-2
Milk Pump Assembly ..................................................................... 7-2
Milk Pick-Up Tube ......................................................................... 7-2
Milk Pump ...................................................................................... 7-2
Milk System Theory of Operation ........................................................................ 7-3
Basic Terminology ......................................................................... 7-3
Initial Setup of the Milk System ..................................................... 7-4
Milk System Capabilities ............................................................... 7-5
A Common Milk Timing Mistake .................................................... 7-5
Air Gate Valve Assembly .................................................................................... 7-5
Air Gate Valves ............................................................................. 7-6
Air Purge Valves ............................................................................ 7-6
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