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53
Daily Blind Flush- At the end of the session, or when you are through using the machine for that day, you
should do a blind flush. It is a very simple task:
1 Remove a filter basket from either of the portafilters and insert the blind basket in its place. The blind filter
basket is the one that has no holes in it seen here:
2 Lock the portafilter into place just like you would to make espresso.
3 Engage the brew function as if you are making espresso
4 Watch the pressure gauge. When the normal brewing pressure is reached, wait about five seconds, then
fully lower the lever to turn of the brew function. There will be a “whoosh” of water out of the bottom of
the group into the drip tray.
5 Repeat steps 3 and 4 one or two more times.
6 Loosen but do not remove the portafilter and turn on the brew switch again. Wiggle the handle of the loose
portafilter so that water can flush the area around the brewhead.
WARNING: Hot water will spill out and pour onto the drip tray. Use caution to avoid burns from
the splashing hot water.
Once Every One Or Two Weeks
Backflushing - This is the process of forcing a special cleaning detergent though the brewgroup. This
will remove any stray coffee left in the places that normal, day-to-day cleaning cannot reach. How often this
should be done depends on how much use the machine gets, the coffee you use, as well as the amount of cof-
fee you use for each pull. If you are making one or two beverages a day then once a month is probably suf-
ficient. If you are making around four to six doubles a day then once every two weeks is probably a good idea.
If the machine is being used all day (such as in an office) then backflushing every day may be in order.
Your DD was supplied with a blind filter (shown above) to be used to backflush. This is the basket with no
holes in it seen in the photo at the top of this page. To use it, follow these simple instructions:
WARNING: Some cleaning agents used for this purpose can be quite strong. Follow all safety rec-
ommendations on the cleaner’s packaging. Only use chemicals specifically designated for back-
flushing. Other cleaners can cause problems or even damage to your machine. Such damage is not
covered by the warranty.
1 Insert the blind filter into one of the portafilters.
2 Place a small amount of espresso machine cleaner into the basket (see manufacturer’s instructions for spe-
cific amounts to be used).
NOTE: Many of these cleaners are formulated for use in commercial environments and are quite
concentrated. Use of excessive amounts of some cleaners may cause accelerated wear to some
internal group parts. We recommend using 1/4 tsp. (1.2 ml) in the blind basket to start.
3 Lock the portafilter into place just like you would to make espresso.
4 Manually engage the brew function
5 When you reach normal brewing pressure, wait five seconds, then turn the brew function off.
6 Repeat steps 4 and 5 until you see the suds of the cleaning agent appear in the drip tray (removing the drip
tray cover during this process can help you see what is going on). When some of the suds from the cleaning
59


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