Checks And Maintenance - Wega MININOVA Manual Del Usuario

15. CHECKS and MAINTENANCE

To ensure perfect safety and efficiency of the appliance over time, it is necessary to carry out routine, preventive and special main-
tenance. In particular, it is advisable to carry out an overall check of the machine at least once a year.
MACHINE
Using the pressure gauge of the machine, check that the pressure in the boiler is about 0.8
- 1.2 bar.
GRUPPO EROGAZIONE
Every 4 months, replace some components of the
group (be sure to use only original spare parts) :
- la guarnizione sottocoppa (A);
- la doccetta (B).
In caso di utilizzo intensivo della macchina,
effettuare la sostutuzione dei componenti
più frequentemente.
- Check for any WATER LEAKS at the bench and the efficiency of the drains.
Check that the pressure relief valve and non-return drain
valve are operating properly, proceeding as follows:
PRESSURE RELIEF VALVE
- Block the pressure switch contacts;
- Wait for the boiler pressure to increase
and check that the valve activates at the
maximum pressure of 2 bar.
NON-RETURN DRAIN VALVE
- activate the dispenser group for about 30 seconds
- attach a filter holder (C) with pressure gauge (available on request) to the group
- activate the dispenser group and use the pressure gauge (D) to check the increase
of pressure up a 8-9 bar
- check the increase of pressure due to the effect of the expansion of the water
that has been heated up to a value of about 12 bar. Reaching this value
proves correct operation on the valve and the seal of the gaskets and
the solenoid valves.
- Check for correct operation of the pressure gauge.
- Check for LIME SCALE on the heating element and boiler.
- Check the efficiency of the solenoid valve of the dispensing group.
X
88
English
All manuals and user guides at all-guides.com
Checks
B
XXX
: Important
espresso coffee machine - technician instructions
Weekly
X X X
A
C
D
: Very important
Monthly Yearly
X
X
X
X