Automatic Water Entry; Pumping System; Volumetric Dosing; Electric Control Unit - Wega Concept Use And Maintenance Manual

Wegaconcept
6

Automatic Water Entry

The Automatic Water Entry system is for checking the
boiler level. It is composed of:
• level probe (short) (
inserted in the boiler, composed of a stainless steel
rod;
• electronic control unit (
• hydraulic circuit controlled by a motor pump and
solenoid valve controlled by the electronic control
unit.
When, during the normal 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 fi lling 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 fi lling after a maximum operating time
(roughly 30 seconds). During the installation of machines
with three or four groups the initial water fi lling time
may exceed the established time limit. In this event,
just switch the machine off and then back on to restore
normal operating conditions.
2
1
7

Pumping system

This is a component that feeds
the machine, raising the water
pressure to 8-9 bar for coffee
delivery and automatic fi lling of
the boiler.
18
1) and safety probe (long) (2)
3) ;
8

Volumetric dosing

The volumetric dosing device serves the purpose of
measuring the quantity of water sent to the group of
espresso delivery.
The dosing device generates an electrical 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 fl ashing of the LED (1)
indicates that the electrical
impulse has been sent from
the dosing device to the
control unit.
9

Electric control unit

The electronic control unit (1) is the core of the
machine. It monitors and controls all operation of the
unit.
Among its functions, it electronically manages the
dose of coffee through the passage of water in the
dispenser and controls the entry of water into the
boiler.
It is set up to be connected to the delivery accounting
systems by means of a specifi c interface.
The information concerning the installed software
(date and version) can be seen on the display when the
machine is turned on.
The information concerning the installed software
(date and version) can be seen on the display when the
machine is turned on.
3
The unit includes a button lithium battery. When
i
it needs replacing, disconnect the machine from
the power outlet and open the central unit placed
inside the equipment.
Dispose of the battery in compliance with the
collection regulations of the country of use.
1
Technical manual
1