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Table of contents 5

2.11 Grinders – idle current calibration .................................................................................................................................................................................................................................... 17

2.12 Grinders – grinding degree setting ................................................................................................................................................................................................................................... 18

2.13 Admixture calibration for proportional valve ............................................................................................................................................................................................................... 19

2.14 Brewing time monitoring .................................................................................................................................................................................................................................................... 20

2.15 Front panel ............................................................................................................................................................................................................................................................................... 21

2.16 Safety valve – Procedure for performing a functional check ................................................................................................................................................................................... 24

3 Maintenance concept ...................................................................................................................................................................................................................... 25

3.1 Overview of maintenance activities ................................................................................................................................................................................................................................. 25

3.1.1 Installation of maintenance packages required for different brewing times ...................................................................................................................................................... 26

3.2 Maintenance packages ......................................................................................................................................................................................................................................................... 27

3.3 Descaling - Preliminary ........................................................................................................................................................................................................................................................ 29

3.4 Pressure release routine ....................................................................................................................................................................................................................................................... 30

3.5 Boiler pressure check ............................................................................................................................................................................................................................................................ 30

3.6 Special tools and aids ........................................................................................................................................................................................................................................................... 31