E61 Espresso Machines - BackFlushing Instructions:
Backflushing can be done only in semi automatic espresso machine that has a manual or 3 way valve (like Rancilio Silvia). Backflushing removes coffee oils residue from the grouphead and from parts from the boiler forward.
Use 3/4 Urnex cafiza packet for excellent results.
First remove the shot basket from the portafilter and insert the blind
filter basket. Then put 3/4 of the urnex powder packet in the blind filter
and close the portafilter back, tightly all the way on the machine.
Hit the brew lever (like you brew coffee) for 5 to 10 seconds. Listen for
the system to pressurize. You'll know it's pressurized because the noise
will decrease. At this point, once the pump noise almost silent, push the
lever down. A pressurized stream of water with cleaning foam will shoot into
the drip tray. keep backflushing the system by repeating the process 5-10
times more until the water runs clean to the tray and without the dirt or
the cafiza foam.
To clean your portafilter, shot basket and drip tray, simply mix the
remaining 1/4 of the detergent packet with hot water and let them soak.
There's no scrubbing necessary. The detergent will literally lift the crud
right off the components. You can use small brush if necessary.
Once you rinsed clean the components, repeat the backflushing steps without
detergent 3 times to wash any remains of the detergent. Then remove the
blind basket, insert back the shot basket into the portafilter, wipe out
your tray and make an espresso shot. Dispose the first two espresso cups,
you're now ready to make espressos all over again.
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