Conti TWIN STAR 2 R-EV 2G, Technical Documentation Manual

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9 MAINTENANCE / SETTINGS
9.1 Daily Maintenance
The routine daily cleaning is extremely important and quick and assures continued optimum
coffee quality and extends the machine’s life span:
- take the filter holders off, clean the spouts, the filters and the filter holder gaskets with a
brush.
- clean the sprinkler with the cleaning filter (on each group): install a filter holder with the blind
filter (dummy filter), press the Continuous push-button for 5 seconds to start the auto-
cleaning procedure of the selected group. Cycles cleaning cycles will be automatically
carried out. This procedure can be stopped before the end by pressing one of the five push-
buttons of the selected group.
_ Clean the steam and hot water wands with a sponge.
_ remove the drip tray and clean it.
_ check if the drain's hole isn't blocked.
9.2 Weekly Maintenance
Use a brush and clean the filters to unclog the holes.
9.3 Maintenance every 3 month
On the group head:
- dismantle and clean the sprinkler ref 355900 and the diffuser ref 404740N.
- dismantle and clean the spray nozzle ref 410704. (be careful to cut off the water supply).
- dismantle and clean the solenoid valve 3ways (be careful to cut off the water supply).
9.4 12 bar Security valve
This component assure the security of the coffee group when the pressure is
exceeding 12 bar. All the 12 bar security valves must be changed once a year to
assure the correct functioning of the machine and the security of the users.
This component (reference 409774) is tared to 12bar in factory, the complete
valves must be changed.
9.5 Recommendation
Each intervention inside the machine must be executed with some precautions:
1/ Switch the machine off.
2/ Close the cut-off tap of the main water supply.
3/ Remove the existential pressure of the steam boiler (open the steam tap "V" ).
If the earth protection has to be disconnected, firstly remove the electrical plug.
The non-respect of those directives relieve the manufacturer of all responsibility in case
of any accident.
Washing in process Rinse Rinsing in process