Wega Wegaconcept, Use And Maintenance Manual

Page: 17 / 76

17
Wegaconcept
Technical manual
ENGLISH
6
Automatic Water Entry
The Automatic Water Entry system is for checking the
boiler level. It is composed of:
t
level probe (short) ( 1 )and safety probe (long) ( 2 ) in-
serted in the boiler, composed of a stainless steel rod;
electronic control unit ( 3 ) ;
t hydraulic circuit controlled by
a motor pump and a solenoid
valve controlled by the elec-
tronic control unit.
W h e n , d u r i n g t h e n o r m a l
operation of the machine, the water
level drops down, the level probe
(
1 ) sends a signal to the electronic
control unit ( 3 ), which activates the motor pump and the
filling solenoid valve, thus restoring the level of water in
the boiler.
If the level is very low or there is no water in the boiler
(during the machine's installation or due to a failure),
the safety probe (
2 ) sends a signal to the control unit
which de-activates the heating element to keep it from
overheating and activates the motor pump and the
solenoid valve to restore the level of water in the boiler.
To avoid possible flooding due to machine
malfunctions or leaks in the hydraulic circuit, the
electronic control unit includes a timing device that cuts
off automatic filling after a maximum operating time
(roughly 30 seconds). During the installation of machines
with three or four groups the initial water filling time
may exceed the established time limit. In this event,
just switch the machine off and then back on to restore
normal operating conditions.
1
2
7
Volumetric dosing
The volumetric dosing device serves the purpose of
measuring the quantity of water sent to the group of
espresso delivery.
T h e d o s i n g d e v i c e
g e n e r a te s a n e l e c t r i c a l
impulse which is sent to the
electronic control unit.
This impulse is read by the
control unit and memorized
during the programming of
the dose.
The flashing of the LED (1)
indicates that the electrical impulse has been sent from
the dosing device to the control unit.
8
Pressure switch
The machine includes two types of pressure switches:
COFFEE BOILER PRESSURE SWITCH
Each coffee boiler is equipped with a
pressure switch to control the pressure.
Calibration is set to 5 bar and can be
distinguished by the green seal.
SERVICES BOILER PRESSURE SWITCH
also the boiler is equipped with a pressure
switch to control the pressure.
Calibration is set to 1.5 bar and can be distinguished
by the red seal.
9
Anti-flooding device
The cover installed on the pressure relief valve
makes it possible to collect any water which may
leak from the boiler
due to malfunction
and channel it to the
drain pad, by means
of a special hose.
3
1