18
of
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TECHNICIANS' manual
Core200
2.8.13 Automatic Water Entry
The Automatic Water Entry system is for checking the
boiler level. It is composed of:
•
probe inserted in the boiler
(F)
composed of a stain-
less steel rod;
•
standard control unit, electronic;
•
hydraulic circuit with a solenoid valve controlled by
the regulator.
The electronic control unit controls the level of water
in the boiler. When the level of water in the boiler drops,
the contact with the probe is interrupted. The control
unit sends and impulse to the entry solenoid valve and
to the motor pump, which act to restore the normal level
of water in the boiler.
To avoid possible flooding due to machine malfunc-
tions or leaks in the hydraulic circuit, the electronic
control unit includes a “Time-out” feature that cuts off
automatic filling after a certain time (2 minutei).
2.8.14 Water filter
Mains water contains insoluble salts,
which cause the build-up of lime scale de-
posits in the boiler and other parts of the
machine.
Drinking water can also contain traces of
heavy metals and substances, such as chlo-
rine, harmful to health.
The filter makes it possible to eliminate or
substantially reduce the presence of these
mineral salts.
The cartridge contained in the water filter
must be replaced at the frequency specified
by the manufacturera con la frequenza indi-
cata dal costruttore.
For the water filter use and maintenance, follow the provisions
in par. 8.5.
2.8.15 Safety thermostat
The thermostat allows you to avoid damage to the
electrical resistance in case of lack of water in the boiler.
The thermostat bulb
(J)
is located inside a sheath
(H)
placed at the center of resistance
(G)
. The contacts of the
thermostat are connected to the electrical resistance. If
the electrical resistance is exposed due to failure to load
water to the boiler, the temperature of the resistance
increases dramatically. At this point, the thermostat inter-
rupts the power supply to the resistance thus preventing
damage.
To reset the thermostat, press the center button (K). However,
before trying to operate the machine, verify the causes of the
blockade of the water feeding the boiler.
2.8.16 Softener
The resin softener can be used as an
alternative to the water filter.
This component has the property of
retaining the calcium contained in the
water. For this reason, the resins become
saturated after a certain period and must
be regenerated with coarse kitchen
salt (NaCl, sodium chloride) or special
water softening salt. It is very important
to regenerate the softener within the
established times. However, in locations where water
is very hard, it will be necessary to regenerate it more
frequently. The same is true of places in which there is
a large consumption of hot water for tea or other uses.
For the softener use and regeneration, follow the provisions in
par. 8.6.
F
J
K
H
G
Summary of Contents for 10003318
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