Gastroback Design Espresso Maschine Advanced S Operating Instructions Manual page 63

5. Replace the filling level indicator. For this, hold the filling level indicator with the
inscription facing to the front side of the drip tray. Then insert the pins on the hinges
of the filling level indicator into the holders in the base of the drip tray and press the
filling level indicator firmly down until it settles with a click.
6. Replace any items, you wish to store in the storage tray. Then, insert the storage tray,
drip tray, and drip tray rack in the base of the housing.
DE-SCALING THE MACHINE
Avoiding the Deposition of Scale
After regular use, hard water can cause mineral build-up in and on many of the inter-
nal components, reducing the water flow and power of the machine, and affecting the
quality of your coffee.
We advise de-scaling the machine on a regular basis (every 2-3 months). Do not use
any corrosive chemicals as these could damage the metal and seals of the machine.
Instead you may use a mixture of white vinegar and water or, what's better, the Gastro-
back Premium De-Scaler (Art.-No.: 98175), containing special additives for preserving
the metal surfaces thus maintaining high performance of our machines. Mix 100ml of the
Gastroback Premium De-Scaler with up to 2000ml of clear water.
Because of the natural variations in water hardness and usage of the machine, we can
only give some guidelines for the frequency of de-scaling the machine. See the following
table as a rule of thumb:
Hardness Litres
low every 150 litres
medium every 90 litres
high every 60 litres
PREPARATIONS
1. Ensure that the control dial is in the central standby position. Switch off the machine
by pressing the POWER button and unplug the machine.
2. Remove the portafilter and water tank. Empty the water tank and remove the water
filter. Thereafter, re-assemble the water tank.
3. Pour the de-scaling mixture into the water tank.
4. Plug in the machine. Ensure that the control dial is in the central standby position and
press the POWER button to switch it on.
Recommended frequency of de-scaling
Weeks
every 16 to 24 weeks
every 8 to 10 weeks
up to 4 weeks
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