Technical Description - TecniDelta MAYOR 1720 2G Manual De Usuario

4. TECHNICAL DESCRIPTION

4.1 WORKING PRINCIPLES
The espresso coffee machine is composed essentially by the following
elements:
„ BOILER
Main functions are water heating and steam production. It is made in a low
lead content copper alloy.
„ DISTRIBUTOR GROUP WITH DEDICATED THERMAL TUBE
The distributor group is the component in which the filter holder is inserted
and trough the passage of hot water, originates infusion phase and beverage
distribution. The thermal tube, one for each group, while submerged, allows
heat transfer from the boiler's hot water to the incoming tap water, reaching
ideal temperature for coffee extraction in the minimum amount of time and
without causing thermal imbalances in the machine.
„ HEATING ELEMENT
It is a tubular resistance that heats water and produces steam inside the boiler.
„ ELECTRICAL PUMP
This device is used to increase water pressure, usually insufficient when it co-
mes from public water network, until it reaches 9 bar, ideal for extracting the
best espresso.
„ STEAM LANCE
Allows foaming milk trough vapour, essential to make cappuccino, also allows
to heat water or punch as well as to prepare chocolate.
„ HOT WATER LANCE
It supplies hot water for preparing hot beverages like infusions.
„ CONTROL INSTRUMENTS
Pressure gauge: indicates boiler and pump pressure.
NTC: Component for temperature control of thermoblocks. When the set tem-
perature is reached, the thermoblock stops being fed, starting again when the
set temperature drops. The temperature is programmed through the center
plate
Thermostat: works as a safety element, cutting the power to the heat source in
the event of overheating.
„ MAIN SWITCH
In the "OFF" position there is no power supply to the machine components and
the machine is switched off. When the switch is turned to the "ON" position it
will turn on the display and the lighting LEDs. An icon will appear on the dis-
play to turn on the machine.
„ 6 FUNCTION KEYBOARD
Coffee extraction with different doses and start/stop.
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