Boilers; Control Of The Pressure In The Boiler; Automatic Water Entry - Wega Mininova Use And Maintenance Manual For The Technician

4

Boilers

The boiler is constructed in steel (1) (version 1GR)
or copper sheet metal (version 2GR) , to which the
heat exchangers (3) are assembled which in turn are
connected to the delivery group. During delivery, cold
water is sent to the inside of the exchanger by means of
the motor pump. Inside the heat exchanger, cold water
and the pre-existing hot water are mixed, thus obtaining
optimal water temperature for coffee infusion.
The water is heated in the boiler by means of an
electrical heating element immerged in the water (2).
Version 1GR
1
Version 2GR
1
!
Do not replace thhe heating element with a higher
power one. Before making any modification contact
the manufacturer.
Technical manual
5
Versions EMA - EPU:
boiler pressure by activating or bypassing the heating
element in the boiler.
Version EVD:
appropriate NTC sensor place on the boiler (2). This
sensor continously sends information to the electronic
control unit, which as a result, active or less the heating
element by using a power triac.
3
6
boiler level. It is composed of:
• level probe inserted in the boiler (1) composed of a
2 • electronic control unit (2);
• the pump allows the raising
controls the water level in the
boiler. When the water level
drops down, the contact with
the probe is interrupted, the
electronic control unit sends
a signal to the filling solenoid
valve, which activates the motor pump and the filling
solenoid valve, thus restoring the level of water in the
boiler.
2
malfunctions or leaks in the hydraulic circuit, the
electronic control unit includes a timing device
"Time-out" that cuts off automatic filling after a
maximum operating time (2 minutes).

Control of the pressure in the boiler

The pressure switch (1) makes it possible to control
The pressure in the boiler is controlled by an
1
2

Automatic Water Entry

The Automatic Water Entry system is for checking the
stainless steel rod;
of the pressure of the inflow
water at a pressure of 8-9 bar
for the delivery.
The electronic control unit
To avoid possible flooding due to machine
!
In versions with the inner tank, the water lack is reported,
in version EVD by the flashing of led STOP/PROG. of the
push button panel or by the specific warning light in
versions EMA-EPU.
ROSSO
C:0 M:100 Y:100 K:0
NERO
C:0 M:0 Y:0 K:100
VERDE
C:100 M:0 Y:100 K:0
1
2
25