Cleaning The Serving Units And The Filter Holder; Cleaning The Tray And The Cup Support Grill; Cleaning The Steam Spout; Substitution Of Boiler Water - SM Duale Class Manuel D'instructions

7.1 Cleaning the serving units and the filter holder

1) Using the brush, clean the seat in the unit in which the filter cup is inserted.
2) Insert the cup in the unit and, without latching it completely, drawn water by the coffee serving unit.
3) Let water overflow from the filter holder. This will clean the serving group.
The continuous flow of water from the unit can cause burns due to accidental skin con-
tacts.
4. Stop the water flow and insert the filter cup in the unit.
5. Clean the perforated filter and place it back into the cup. Let the water flow for a couple of seconds to
clean the filter, the cup and the spouts.
6. Repeat these operations on all the serving units.
Note:
Special commercially available detergents can be used to effectively clean the serving units.

7.2 Cleaning the tray and the cup support grill

The lower cup support grill must be kept clean at all times; during the normal use of the machine, it is suf-
ficient to clean it with a sponge or a moist cloth. At the end of the working day, clean the tray and the grill
also in the internal areas using warm water and neutral detergent. Even the upper grid to hold cups must be
kept clean. At the end of the day clean it with a sponge or damp cloth. Do not pour water on the upper grid.

7.3 Cleaning the steam spout

Clean the steam spout with a sponge or a moist cloth at the end of the working day to remove all traces of milk or other
substances that inevitably form during the normal operation of the machine. Open the steam tap, placing the spout in
the tub, to remove any residues which may have accumulated in the spout.

7.4 Substitution of boiler water

To change the water inside the boiler, proceed as follows:
1) Cut off the power supply to the machine by turning the main switch 1 to position 0 (zero).
2) Remove the tub and the cup support grille and open the boiler drain tap.
3) Open a steam drawing valve to facilitate the draining of the water until the end of the operation.
4) When water no longer comes out of the boiler, close the boiler drain and the steam drawing tap.
5) Charge the machine with water following the instructions of paragraph "Charging the water in the boiler".
6) To improve product quality, it is recommended to replace the water in the boiler and to change the water
contained in the water circulation pipes when starting the machine every day.

8. idle periods

If the machine is to remain idle for long periods (weekly closing days, holidays, etc.), take the following precautions:
1) Turn the main switch to 0 (zero) and as necessary disconnect the power cord or the main switch of the
electrical mains.
2) Close the cut-off valve of the water mains.
3) If you think the temperature might drop below 5 °C, completely drain the water system of the machine.
4) Wash the components of the machine as described in the paragraph on routine maintenance.
5) Cover the machine if necessary.

9. safety devices

9.1 Manual reset safety thermostat

The safety thermostat is located next to the control unit and can be accessed by removing the left side panel
from the machine. The thermostat probe, placed inside the electric heating elements, cuts the electric power
supply any time there is an abnormal increase in temperature. The heating elements will no longer hear the
water in the boiler and it will not be possible to use the machine correctly. Contact a technician from the LA
SAN MARCO SPA technical service centre.
31