Chris Coffee Service Alexia User Manual download pdf (Page 14)

Alexia'Espresso'Machine'

13'

Backflushing with espresso machine cleaner is the same procedure as above

with a few minor differences. The first difference is backflushing with espresso machine

cleaner only needs to be done approximately once a month or every 35-50 espressos. I

don't recommend backflushing with cleaner more often than once every three weeks since

overuse will remove oils that lubricate the brew lever and valves.

To begin, place 1/4 of a teaspoon of espresso machine cleaner into the backflush disc in

the portafilter and then lock the portafilter into the grouphead. Now follow the same

procedure as above until the cleaner is dissolved and the water runs clear (about 5-10

flushes). Remove the portafilter from the group and rinse thoroughly. Then take a damp

cloth and wipe the underside of the group. After you have finished this procedure, I

recommend you pull a shot of espresso and dispose of it to cure the group. You're finished

and ready for another month of espresso.

Maintenance – Continued

Setting Pump (Brew) Pressure

 To set the pump pressure, install the backflush

disc into your portafilter and then lock it into the

group head.

 Remove the top cup warming tray to expose the

expansion valve adjustment screw shown on the

picture to the right.

 Raise the brew lever and then wait a few seconds for the pressure to rise. After the

pressure has risen, use a flat blade screwdriver to turn the expansion valve adjustment

screw. Turning clockwise will increase the pressure, counter clockwise to decrease the

pressure.

 The recommended setting with the backflush disc is 9.5 - 10bar. When you make

espresso the pressure will be slightly less. If the machine puts out 9.5 - 10 bar of

pressure with the backflush disc, but then when you make coffee the pressure is less

than 8 bar*then*the*machine*is*fine,*it’s*the*grind*that*needs*to*be*adjusted*finer.

Expansion Valve Adjustment

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Chris Coffee Service Alexia User Manual Page 14