Crane Voce Media, Техническое руководство

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Technical Manual 85
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A FRESH APPOACH TO VENDING
10.2 Hot Water Tank De-Scale Procedure
To maintain correct water levels and water temperature the heater tank must be
inspected regularly and, if necessary, be de-scaled. To ensure long and trouble-free
operation, Crane Merchandising Systems recommend that all machines have a water filter
fitted.
There are a number of ways of de-scaling the heater tank. The tank can be removed and
scraped out with a blunt tool but it can also be left inside the machine and a de-scaling
agent introduced into the tank. This eliminates the need to remove the thermistor, water
level probe and all the outlet valves from the tank, saving time and money. Always
remember to fit a new water filter and boiler seal after de-scaling.
Use the following steps as a guideline only and always refer to the instructions supplied
with the de-scaling agents regarding dosage and de-scaling time.
1. Switch off the machine and open the door. Remove all canisters and back covers.
2. Using the drain hose fitted to the tank, remove the bung and drain the water from
the heater.
Safety First! Allow the water in the tank to cool before draining.
3. Once all of the water has drained from the tank, replace the bung into the drain
hose. Introduce the de-scaling solution in the recommended dosage into the
heater tank. on the machine and allow the heater tank to fill.
4. Turn off the machine and leave for approximately 40 minutes before draining the
tank again following the sequence described above.
5. Fit a new water filter and switch on the machine. Fill the tank and drain again until
all traces of the de-scaler are removed (at least 3 times).
6. Switch on the machine and allow the heater tank to fill and to heat up. Drain and
fill one more time. The machine is now ready to be put back in service.