Inspections And Maintenance; Periodical Inspections; Routine And Supplementary Maintenance; Brewing Unit - LAVAZZA LB 4712 Maintenance Manual

8. INSPECTIONS AND MAINTENANCE

8.1. Periodical inspections

every week check the boiler pressure using the machine
pressure gauge.
Note
The boiler pressure must be 0.8-1.2 bar.
every week check the softener condition.
every four months check the gaskets of the brewing unit
(for brewing unit disassembling see the section 8.2.1.).
every four months replace the perforator (for replacing
procedure see the section 8.2.2.).
every year check the correct operation of the safety,
pressure-relief and discharge-on-way valves (for chec-
king procedure see the section 8.2.3.).
every year check the correct operation of the pressure
gauge.
every year check for possible lime scale build up on the
heating element and boiler.
every year check the efficiency of the solenoid valve of
the brewing unit.
every year check for possible water leaks on the bench
and the condition of the discharge devices.

8.2. Routine and supplementary maintenance

8.2.1. Brewing unit

To replace the brewing unit components proceed as fol-
lows:
- loosen the screw (a);
- remove the spring (B);
- replace the perforator (c), if damaged, (not compliant
dispensing);
- loosen the ring (d);
- replace the gasket (e);
- replace the gasket (F).
20
Maintenance manual for technical assistance
F
E
B

8.2.2. Replacing the perforator

To replace the perforator proceed as follows:
- with a small screwdriver, remove the spring (1) that
blocks the perforator (2) in the capsule-holder seat;
- remove the perforator (2) and replace it with a new one;
- place the spring (1) back into position.
1
Manual code 10066846 / Rel. 0.00 / March 2012
D
C
A
2
1