DeLonghi BCO 420 User Manual

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creamy appearance and increasing its volume. To obtain 
creamier foam, immerse the milk-frother in the milk and 
move the container slowly upwards. 

8.   When the volume of the milk has doubled, immerse the 

milk-frother fully and continue to heat the milk. When the 
required temperature is reached (ideally  60°), together 
with the right density of cream, cut off the steam supply 
by turning the steam knob in a clockwise direction until it 
stops, and rotating the selector to position     . To turn 
off the machine, turn the selector knob to position e  .

9.  Pour the emulsified milk into the cups containing the pre-

viously prepared espresso coffee. The cappuccino is now 
ready. Add sugar to taste and, if desired, sprinkle a little 
chocolate powder on the froth.   

•  If you want to prepare more than one cappuccino, make

all the espresso coffees together in advance and only then 
prepare the whipped cream for all the cappuccinos. 

•  If you want to prepare some more coffee after whipping

up  the  milk,  wait  until  the  boiler  cools  down,  because 
otherwise the coffee will come out burnt.

 

To cool down the boiler, put a container under the boiler 
nozzle; turn the selector knob to  

 (fig. 16); let the wa-

ter escape until the “OK” light goes out; turn the selector
knob back to   and prepare the coffee as described in 
the preceding paragraphs.

•  You are advised not to let the steam come out for more

than 60 seconds, and not to froth up the milk more than 3 
times consecutively.

For reasons of hygiene you are recommended to always clean 
the milk-frother after use. Proceed in the following manner:
1.  Allow  a  little  steam  to  escape  for  a  few  seconds  (see 

points 2, 5, and 6 of the preceding paragraph) by turning 
the steam knob (fig. 25). In this way, the milk-frother will 
flush out milk that may have remained inside it. Turn off 
the appliance by pressing the on/off button.

2.   Grip the tube of the milk-frother firmly with one hand, 

and with the other, release the milk-frother itself by tur-
ning it in a clockwise direction and unscrewing it down-
wards (fig. 26).

3.   Remove the steam nozzle from the supply tube by pulling 

it downwards.

4.   Wash the milk-frother and the steam nozzle thoroughly in 

warm water.

5.   Check that the two holes indicated by arrows in fig. 27 are 

not blocked. If necessary, clean them out with a pin. 

6.   Replace the steam nozzle, pushing it upwards quite force-

fully into the steam tube.

7.   Re-mount the milk-frother by screwing it upwards in an 

anti-clockwise direction.

Production of hot water 
1.  Switch on the machine by turning the selector knob to po-

sition     (the relative light will come on) (fig. 12). Wait 
until the OK light shows (fig. 15).

2.  Position a receptacle under the milk-frother.
3.  When  the  OK  light  comes  on,  position  the  selec-

tor  knob  at   

  (fig.  16),  simultaneously  turning 

the  steam  knob  in  an  anti-clockwise  direction  (fig. 
25):  hot  water  will  come  out  of  the  milk-frother.

4.  To stop the flow of hot water, turn the steam knob in a 

clockwise direction and turn the selector knob to       
(fig. 12). 

 

A maximum output of 60 seconds is advisable.

•  During the cleaning operation, never immerse the machi-

ne in water. It is an electrical appliance. 

•  Before carrying out any cleaning of the external parts of

the appliance, switch off the machine, remove the plug 
from the power socket and let the machine cool down.

After every 300 coffees, or when the coffee comes out of the 
filter-holder in drops or fails to come out completely, clean the 
filter-holder and the filters in the following manner:
•  Remove the filter from the filter-holder.
•  Undo the top of the filter (fig. 28), unscrewing it in the

direction indicated on the top itself.

•  Remove  the  frothing  device  from  the  container  by  pu-

shing it off the top part.

•  Take out the washer.

•  Rinse all the components and clean the metal filter tho-

roughly with hot water, scrubbing it with a brush (fig. 29). 
Check that the small holes in the filter are no blocked and, 
if necessary, clean them out with a pin (see fig. 30).

•  Replace the filter and the washer on the plastic disc, as

shown in fig. 31. Take care to insert the pin of the plastic