modbar av Series - Brewing After First Installation; Installing the Portafilters; Brewing Coffee; Water Pump Operations

EN
20
In normal operating conditions, the coffee
boiler pressure transducer, while brewing,
can read anywhere from 0-12 bar when
brewing.
3) Brewing after rst installation
Once the rst installation procedures are
nished, before proceeding with brewing
coffee, please follow these steps:
• Engage the portalters by inserting
them into each group, brew water
through each group for at least two
minutes.
- At least 1 liter for a 1/2 group machine
4) Installing the portalters
Install the portalter(s) by inserting them
into the group and rotate the handle from
left to right. When the portalters are
inserted properly, you can press any of
brew buttons to start the ow of water
through the portalter. You should allow
hot water to pass through the empty
portalter(s) for a few seconds each time,
in order to preheat the portalter.
Note:
It is important to leave the portalters
installed in the espresso machine when
not in use. The portalter must remain
heated for the brew process to function
correctly.
5) Brewing coffee
Now you can brew an espresso. Disengage
one of the portalters, ll the lter with
ground coffee, tamp the ground coffee
with the tamper supplied (exerting a force
of 20 kg) and re-engage the portalter to
the group. Use the tap lever to begin the
brewing process.
Note:
Some baristas believe it is important
to press the brewing device prior to
installing the portalter to allow the water
to ush any remaining coffee oils and
particles from the group. Some also ush
just after brewing coffee for the same
reason. Please experiment to nd the best
possible procedure for you.
6) Water pump
Whenever you are brewing coffee, and you
can adjust the pump pressure by turning
the by-pass screw (below the plug located
on the side to which the pump power
supply is connected) clockwise to increase
and counter-clockwise to reduce pressure.
Adjust pressure only when at least one
group is brewing coffee.
Note: When the heating element in the
coffee boiler is energized, the water will
expand increasing the start-up pressure.
Once the maximum pressure is reached,
the expansion (safety) valve should start
working by discharging a few drops of
water, in order to prevent such pressure
from exceeding 11-12 bar.
In case the pressure exceeds 12 bar,
you must adjust the expansion valve by
unscrewing the cap slightly. If this is not
sufcient, remove the valve and clear away
any calcium deposits. This remedy is valid
also in case the valve remains open in the
drain position (i.e. the pressure cannot
increase to 8 bar approx.).
7) General notes for coffee preparation
The portalters must remain heated since
they are at the lowest position of the
group itself, and they are partially isolated
due to the rubber gasket between them.
This can be accomplished by leaving the
portalters installed in the machine when
not in use. The portalters may also be
Expansion Valve
Filter Basket
Porta Filter
O-ring Gasket
Double Spout