27© by N&W GLOBAL VENDING SpA 02-2007 266 00PERIODICAL CLEANINGAt least once a year, or more frequently according to theuse of the machine and the quality of the inlet water, theentire foodstuff circuit system must be cleaned and sani-tized as described below.SANITISING- all parts of the hydraulic system in contact with food,including the hoses, must be removed from the unit andfully disassembled;- all visible residue and product films are mechanicallyremoved using brushes or similar tools, if necessary;- all components must be soaked in a sanitising solution forat least 20 minutes;- the unit internal surfaces are to be cleaned with the samesanitising solution;- thoroughly rinse and then reinstall the parts.Before restarting the machine, the same sanitisingprocedure described in section “Sanitising the mixersand the foodstuff circuits” should be repeated.CLEANING THE PRODUCT CONTAINERS- Remove the containers from the machine;- undo the product ports and slide out the augers from backof the container;- clean all parts in a solution of hot water and chlorine-based detergents and dry thoroughly.EMPTYING THE BOILEREmptying of the boiler may become necessary in theevent the vending machine is placed on storage orwhen the boiler needs maintenance.During its operation the boiler contains very hot waterunder pressure and can cause injury to persons.- Open the vending machine door and make sure themachine is switched off.- Completely empty the air-break.- Wait for the water inside the boiler to cool down.- Undo and remove, from the by-pass end, the tubeconnecting the by-pass to the boiler and direct it to acontainer.- Insert the yellow key into the door switch.- Access the maintenance menu and find the item “Specialfunctions”. Press in a sequence buttons 8 and 4; waterwill start flowing from the boiler.When emptying is completed, switch off the machine ereconnect the by-pass tube.