MPM MKW-08M Manuel De L'utilisateur page 19

4. Clean the steam jet nozzle (14) after every use. Immerse the steam jet nozzle in water and
turn on the steam. Next, remove the guard (16) from the steam jet nozzle and wash it in warm
water, rinse it clean and dry. Reinstall afterwards.
5. Periodically clean and inspect the operation of the tapped valve at the bottom of the water
tank. Clean the poppet valve under running water and gently press it several times in the
process. Inspect and periodically clean the valve seat in the housing of the espresso machine.
6. Clean the flat filter located in the portafilter socket (10) after every 50 cups of coffee or so. In
order to clean the filter, follow these steps:
 use a screwdriver to loosen the screw holding the flat, round filter in the group head
 wash the filter in warm water with a detergent, then rinse and dry, check that filter mesh
is unobstructed
 replace the clean filter and tighten the screw:
7. Descale the espresso machine every 4 or 5 weeks. Regular descaling ensures a better taste
and aroma of your coffee and extends the operating life of your espresso machine. Follow
these steps for descaling:
 Prepare a water solution of citric acid: use 1 litre of water and 4 tablespoons of citric acid.
Pour the mixture into the water tank.
 Attach the filter holder with an empty filter to the receptacle and install the drip tray with
the grate. Place an empty container on the grate.
 Plug the espresso machine to the mains and turn on. Wait for the water to preheat.
 turn the water flow on by pressing the (2c) button, wait for some time, repeat three times,
empty the dish as needed
 Turn on the steaming switch (2d). Wait for the steam to preheat. Place an empty container
under the steam jet nozzle and release hot steam for about 1 minute.
 Discard the unused water with citric acid. Add clean drinking water to the tank.
 Repeat the descaling process with pure water only (by passing hot water through the filter
holder and venting steam) to remove residues of citric acid.
 Remove the drip tray, turn off the espresso machine, unplug it from the mains and wait
until it cools down completely.
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