MNP37M03GBV00 Date: 24-11 Rev. 0
Page 30 of 79
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Should the temperature control system fail (memory loss, sensor failure,
connection failure, etc.) the boiler heating element will heat the water without
control and, therefore, the brass cover walls. To prevent the temperature from
reaching dangerous levels, there is a bimetal bipolar thermostat affixed to the
back of the boiler with two screws. This sensor is set at
120 °C
and puts the
machine out of service when the boiler metal walls reach this temperature. This
sensor can be reset manually by pressing the red button. To do this, open the
brewing assembly door by removing the screw that holds it in place and you will
be able to access the red reset button.
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If the temperature of the water in the boiler is under 10 °C below working
temperature, the machine will not make any sales.
4
5
1
3
9
8
2
7
6
10
You should take into account that, when you first start the machine up or when the
water circuit has been emptied for maintenance or other reasons, the heating element
will not begin to heat up the water until the air-break is full.
During the initial setup of the machine or when the boiler has been emptied for
maintenance purposes, it is essential to ensure that the boiler is filled, either
automatically, using any of the machine’s available systems, or manually by carrying out
a manual washing operation. To ensure it is completely full, you should check that water
comes out through any of the product delivery elbows in the rotating arm.
figure 6.05
1.
Pressure boiler upper cover
2.
Pressure boiler lower cover
3.
1000 W 220 V heating element
4.
Beater power supply solenoid
valves (2-way)
5.
Coffee assembly power supply
solenoid valves (3-way)
6.
Bimetal bipolar thermostat set at
120 °C Boiler lid
7.
Temperature sensor set
8.
12-bar safety valve
9.
One-way valve
10. Boiler filling tube connection
coupling
