Necta Koro Espresso Installation, Use And Maintenance Manual

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Necta Koro Espresso Installation, Use And Maintenance Manual Manual pdf 31 page image

27© by N&W GLOBAL VENDING SpA 0512 264 - 00Removing the upper filter- Take the snap ring out of its seat;- remove the piston from the crosspiece;- remove the filter and the piston seal.Removing the lower filter- Remove the coffee funnel (see Fig. 24);- remove the lower piston snap ring;- take the piston out of brew chamber and remove the filter.Soak all components removed from the unit in a solution ofboiling hot water and coffee machine detergent for approx.20 minutes.Thoroughly rinse and dry all parts, then reinstall them in thereverse order of disassembly, taking particular care that:- the piston is positioned in the correct notch for the coffeedose used (see relevant section);- the two reference notches match and that the coffee unitis inserted.Important notice!!!Check that the handle pin of the ratiomotor is correctlyengaged in its seat.Chapter 3MAINTENANCEImportant notice!!Access to the machine interior for maintenance and/orrepairs is via the back panel and from the side panels.Therefore the machine is designed to be rotated, thusallowing removal of the back panel and of the side panels.The integrity of the machine and compliance with thestandards of the relevant systems must be checked atleast once a year by qualified personnel.With the main switches turned off, the terminal stripconnected to the line cable, the fuses and the noisesuppressor stay energised in any case.Before starting any maintenance operations requiringparts of the unit to be removed, the machine mustalways be switched off.The operations described below must be carried outonly by personnel who have the specific knowledge ofthe machine functioning from a point of view of electri-cal safety and health regulations.INTRODUCTIONTo ensure correct operation for a long period, the machinemust be subjected to regular maintenance.The following sections contain the procedures and themaintenance schedule, which are only a general indication,as they greatly depend on the operating conditions (e.g.water hardness, environmental humidity and temperature,type of product used, etc.).The procedures described in this chapter are not exhaus-tive of all maintenance operations to be carried out.More complex operations (e.g. boiler descaling) should becarried out by qualified technicians only having specificknowledge of the machine.To prevent oxidation or the action of chemical agents, thestainless steel and varnished surfaces should be keptclean by using mild detergents (solvents must not be used).Under no circumstances should water jets be used toclean the machine.BREWING UNIT MAINTENANCEEvery 10,000 selections or every 6 months some mainte-nance of the coffee unit must be carried out.Maintenance is carried out as follows:- remove the boiler Teflon hose connection from the upperpiston, paying attention not to lose the seal (see Fig. 24);- undo the knob securing the unit to the bracket;- remove the brewing unit.Fig. 241 - Coffee funnel2 - Boiler connecting hose3 - Unit securing knob4 - Upper piston snap ring5 - Lower piston snap ring6 - Reference notches7 - Ratiomotor handle pin