28
OptiBean (XL) Touch
2018/02 Rev. 0.4
3.2
Components
Component
Image
Inlet valve KW1 [1001161]
Opens and closes the water supply, 24 Vdc coil closure.
Pressure reducer DR [1000702]
Reduces the water supply pressure to 2 bar.
The water pressure is not adjustable.
Pay attention to the flow direction!
Flow meter FL [1000530]
Measures the supplied quantity of water using rotating magnets
and a bipolar Hall sensor. Pay attention to the flow direction!
Power Relay [1004596] 3x
The heating element, brewer motor and pump are controlled by a
power relay.
Pump KW2 [1000696]
Non-return valve [1000748]
Rotary membrane pump; increases the water supply pressure to
an espresso pressure of 10 bar.
The rotating membrane cells increase the outlet water pressure.
An internal bypass valve pumps the water round in the pump
housing if no pressure decrease occurs.
See Section 5.7 Check / set the pump pressure.
Pressure boiler H2-3 [1000530]
Closed pressure boiler manufactured entirely from material AISI
316L
Temperature sensor [1000740]
Screw thread M12x1 / material AISI 316L / 100 kΩ / 25 °C
Boil-dry protection [1000736]
Activation temperature 135 °C / 2 pole / manual reset
Brewer valve DV1 [1000699]
Supplies the brewer with hot water at 10 bar. When the valve is
energised, the hot water supply to the brewer is opened. When
this closes, the brewer is vented.
