Wega Concept - Boilers; Coffee boiler; Services boiler

16
Wegaconcept
Technical manual
4 Boilers
There are two kinds of boilers inside the machine:
4.1 Co ee boiler
Each delivery group is
equipped with a coffee
boiler (1) of limited capacity
(1,2 litres).
These boilers provide
hot water for the co ee.
Heat is provided by an
electric heating element
(2).
For each boiler are
installed: a temperature
sensor (3), a safety thermostat (4), and a pressure
switch.
4.1.1 Security systems:
Co ee boiler pressure switch.
Each co ee boiler is equipped with a safety
switch to control the pressure.
Calibration is set to 5 Bar and can be
distinguished by the GREEN seal.
Expansion - non-return valve
This is a valve consisting of an expansion
valve and a non-return valve.
expansion valve (• 5): the cold water sent from the
pump to the heat exchangers is heated. This heating
causes an increase in the volume of
water. To limit pressure increases in
the hydraulic circuit, the valve lim-
its the maximum internal pressure
of the circuit to 12 Bar.
non-return valve (• 6): its function is
that of preventing the back  ow of
water from the exchangers in the
hydraulic circuit.
Temperature sensor (3).
Turns o the resistance when 130° C are reached and
displays an alarm.
Temperature sensor (4).
Turns o the resistance when 150° C are reached.
CPU Control.
Turns o the resistance if using 100% of its max power
for 45 minutes.
4.2 Services boiler
Inside the co ee machine, there is a services boiler
(7).
This boiler provides steam and hot water for tea.
Heat is provided by an electric heating element (8).
The boiler includes a temperature sensor (10), a safety
valve (11), a level probe (9a) and a safety probe (9b).
9a
8
7
9b
10
11
4 3
2
1
4.2.1 Security systems:
Services boiler pressure switch.
Also the boiler is equipped with a safety switch to
control the pressure.
Calibration is set to 1.5 Bar and can be distinguished
by the red seal.
Pressure limitation safety valve
The pressure relief valve guarantees that
the pressure in the boiler does not go above
2 Bar. If there is a malfunction, the valve can
eliminate all the excess pressure from the
boiler.
Temperature sensor (10).
Turns o the resistance when 130° C are reached and
displays an alarm.
CPU Control.
Turns o the resistance if using 100% of its max power
for 60 minutes.
5
6