© by N&W GLOBAL VENDING S.p.A.
45
03 - 2011 3685 00
Chapter 3
Maintenance
The integrity of the machine and compliance of the
corresponding systems with the regulations shall
be verified, at least once a year, by qualified per
-
sonnel.
Always switch off the machine before starting
maintenance operations which require the disas-
sembling of components.
The operations described below shall be carried
out only by personnel with specific knowledge of
the operation of the machine both from the point of
view of electrical safety and of hygiene.
GENERALITIES
In order to ensure its correct operation, the machine
shall be subject to periodical maintenance.
Listed below are the operations to be carried out and
the related expiry dates; they are, obviously, indicative
because they depend on the conditions of use (i.e. water
hardness, environment humidity and temperature, type
of product used, etc.).
The operations described in this chapter do not include
all the maintenance interventions.
More complex interventions (i.e. descaling of the boiler)
shall be carried out by an engineer with specific knowl
-
edge of the vending machine.
In order to avoid risks of oxidation or of chemical aggres-
sions in general, the painted surfaces and the surfaces
in stainless steel need to be kept cleaned by using neu-
tral detergents (avoid solvents).
Jets of water are to be absolutely avoided for wash-
ing the machine.
ESPRESSO UNIT MAINTENANCE
Every 10,000 dispensed items or, however, every 6
months, a small maintenance intervention on the coffee
unit is required for optimising its operation.
For performing the maintenance operations it is neces-
sary to remove the unit by following these steps:
-Disconnect the coffee outlet nozzle (2) from the unit by
rotating it by 90° from the rod (4) and pulling it outside.
-Act the unit end stop lever (8) rotating it until the hori-
zontal position.
-Extract the coffee unit.
Fig. 26
1- Upper piston
2- Coffee outlet nozzle
3- Lower scraper
4- Rod
5- Lateral screw
6- Key
7- Upper seal
8- Unit end stop lever
9- Upper filter
10- Lower filter
11- Lower scraper
12- Lower piston
13- Lower seal
14- Piston stem guide
15- Upper scraper
2
1
3
4
5
7
6
8
1
10
12
2
7
9
15
11
13
14
