S1 Vivaldi II Owner’s ManualPage 9Hardness test strips may be included for this purpose. If your water fails this test, contactyour VII dealer and discuss the available options.Once water supply is properly attached, turned on, and the desired basket has been insertedinto one of the portafilter handles, attach the portafilter to the group. Be sure that the drip trayis installed by sliding it into place at the bottom front of the machine.4.4 Turning On and Heating the Machine1) Insert the plug into the 110V AC socket, the On/STBY light (22) starts flashing. (Stand-by mode).2) Press the ON / OFF (27) button and keep it pressed for about 3 seconds, the greenOn/STBY light (22) changes from flashing to steady indicating the machine is ON. Atthe same time the lights from (14) to (21) turn on steadily for about a second(indicating power on test mode).3) The light corresponding to the set temperature starts flashing to indicate that the groupis heating and the automatic boiler refill starts until the water level preset by themanufacturer is reached.4) Once the filling process is finished, the BOILER light (13) starts flashing to indicatethat the boiler is heating. However, after first switching on, the boiler doesn't work untilthe group has reached the set temperature.5) Fasten the portafilter handle (11) to the brewing group (10).6) Wait until the set temperature is reached, by checking that the lights on the controlpanel (9) gradually turn on as the temperature rises. The visualization starts as soonas the temperature reaches 91°C (turning on of light 14) and continues until themachine has reached its operating temperature (light from flashing to fixed).7) When the group has reached the set temperature, the boiler heating starts (BOILERlight (13) flashing), once it reaches the set temperature the light becomes fixed.8) Every time the group temperature or the boiler temperature drops under the set value,the respective light starts flashing (heating phase) until the set temperature is reached.9) The machine is now ready.WARNING!!To activate and deactivate the boiler mode press the BOILER (26) button. Every time youturn on the machine, the boiler is in service.When the boiler is turned off, it is impossible to use hot water for infusions or steam delivery.The machine can also operate in the economy mode (see relative paragraph).4.5 Espresso Brewing1. Unfasten the portafilter handle (11) from the brewing group (10) and insert the filter forone or Double Cups. Fill it with ground coffee (aprox 7g for a single or 14-15g for adouble), making sure not to leave coffee powder on the upper edge of the portafilterhandle (11), and press it with the suitable coffee tamper provided.2. Firmly attach the portafilter handle (11) to the brewing group (10).