Gaggia SUP 049, Руководство по обслуживанию

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GAGGIA CADORNA 03 OPERATING LOGIC
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Switching on
When the machine is switched on, the gear motor repositions itself as follows:
- It acts on microswitch 1
- The gear motor changes its rotation direction and moves upwards again by approx. 1-2 mm.
- The boiler starts heating to heat the water for approx. 45 sec, in order to reach the optimal temperature.
A thermistor, NTC type (Negative temperature coefficient), is used as a temperature sensor; in the event of
overheating this reduces boiler element power consumption. The electronic system detects the current boiler
temperature from the drop in voltage of the sensor and adjusts it accordingly. Heating element values and
corresponding temperatures: see table Temperature sensor (adjustment)
3.2. Temperature sensor (adjustment)
Temp. (°C) R nom (kΩ) ΔR (+/- %)
20 61.465 8.6
50 17.599 5.9
75 7.214 4.1
80 6.121 3.7
85 5.213 3.4
90 4.459 3.1
100 3.3 2.5
125 1.653 3.9
150 0.893 5.1
3.1. Single microswitch gear motor
The gear motor is powered by a direct current motor that engages with the smaller double toothed wheel us-
ing a worm screw. The unit is mounted on the axle of the large gear wheel and when a coffee is requested, it
moves from the standby position to the dispensing position, and then back to the standby position again.
The microswitch indicates to the gear motor when the brew group is in the work position or home position.
- Standby position: 1
- Dispensing position: 2
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