Transcript
1.
OPERATING PRINCIPLE MATIC/THA KTS 7 11 2
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
PTC element Spray head Flow boiler Switches Water reservoir Mains plug Printed circuit Keyboard Magnetic valve Filter pan Glass decanter Koeler Float controlled valve Level sensors
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5
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14 13
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9 4
1 3
The coffee maker is equipped with a flow boiler system. This contains a magnetic valve with water counter (9), a water reservoir (5), a flow boiler (3), a sprayhead (2) from which the water flows into the filterpan (10), with in between a heat exchanger (12). The entire system is controlled by a printed circuit (7). The water reservoir is equipped with 3 level sensors (float) (14) −resp. whole jug, half jug and minimum level− and a float controlled valve (13), with which the cold waterflow through the heat exchanger is controlled. The sprayhead is equipped with electrodes for the descale indicator. Furthermore the device is at least equipped with: D a switch to turn the system on and off (4); D a key to set the desired amount; D a key to start the coffee making process; D a display from which the status can be read; D an indication light near the start key (green), which burns when the system is working (8); D an indication light (red), which starts blinking when the system needs to be descaled (9); D a buzzer for the acoustic signals.
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When the desired amount is set with the ⇓−key this number will appear on the display. Then the coffee making process can be started by pressing the start key. The magnetic valve (9) will be opened and fills to the upper or lower level sensor, then the flow boiler is turned on, and the water is boiled out via the heat exchanger and the sprayhead. In this situation the float (13) will close the valve in the cold water feeding tube to the heat exchanger. When some time later the water level in the reservoir has lowered, also the float will be lower and the valve will open allowing water to flow to the heat exchanger. In the heat exchanger the cold water will withdraw part of the heat from the hot water flowing to the sprayhead. The purpose of all this, is to allow the temperature to rise to about 92°C quickly in the first part of a coffee brewing cycle, after which the temperature is kept between 92°C and 96°C during the remaining part. Herewith the system complies with the demand of the Norsk Kaffe informasjon (Scandinavian Coffee Brewing Institute). As soon as the water level in the water reservoir becomes lower than the lower sensor (14), the printed circuit will turn off the flow boiler. The hot water will drain from the sprayhead. About 1 minute after the flow through heater is turned off, three beeps will sound and the green indicator lamp will go out.
ECopyright Bravilor Bonamat B.V.
The device has a built in safety that will switch it off, when something is wrong with the water inlet system. The fault situation will also be acoustically indicated. Water can also be poured into the water reservoir by hand. The system then functions like the manually filled type coffee makers. During use scale will accumulate in the system including the sprayhead. This will cause the water to drain from the sprayhead slower.
When after the turning off of the flow through heater the contact between the electrodes in the sprayhead remains longer than 10 seconds the red descale indicator lamp will start blinking. It still will be possible to make coffee with the device for some time. When the scale has been removed from the system the water will drain from the sprayhead at the normal speed. The indicator lamp will not start blinking again. With the start− and ⇓−key the device can be adjusted.
ECopyright Bravilor Bonamat B.V.
