Push firmly to ensure that it fits well at the top(fig. 27).• Wash the glass jug, filter, filter holder and gridin hot soapy water. Rinse with hot water.• Regularly clean the water outlet opening,removing any stuck grains of coffee.DescalingDescale your Espresso Quattro regularly.With normal household use the following ruleapplies:• If you use soft water (hardness up to 18 °DH /22.5 °Clarke) - two or three times a year• If you use hard water (hardness over 18 °DH/22.5 °Clarke) - four or five times a year.Your water supply company can inform youabout the hardness of your water.- Operate the appliance twice as indicated insection "Making Espresso". However, now useordinary vinegar (two Espresso cups) to fillthe water tank and do not fill the filter withground coffee.- To remove any scale setting from the inside ofthe steam pipe, let the appliance producevinegar steam for some time.- To remove all remainders of vinegar and scale,operate the appliance twice with fresh coldwater in the same manner.Then clean all removable items.6Connections - Applicable to U.K. onlyIMPORTANTWARNING - THIS APPLIANCE MUST BEEARTHEDThe wires in the mains lead are coloured inaccordance with the following code:GREEN AND YELLOW - EARTHBLUE - NEUTRALBROWN - LIVEAs the colours of the wires in the mains leadof this appliance may not correspond with thecoloured markings identifying the terminals inyour plug, proceed as follows:The wire which is coloured GREEN ANDYELLOW must be connected to the terminalwhich is marked with the letter "E" or by theearth symbol E or coloured GREEN orGREEN AND YELLOW.The wire which is coloured BROWN must beconnected to the terminal which is markedwith the letter "L" or coloured RED.The wire which is coloured BLUE must beconnected to the terminal which is markedwith a letter "N" or coloured BLACK.Note: If the terminals of the plug are unmarkedor if you are in any doubt consult a qualifiedelectrician.If a (BS 1363) 13 amp. plug is used this mustbe fitted with a 13 amp. fuse.