Gaggia d90 evolution Guía De Operación
30
ENGLISH
6.2 PRESSURE SWITCH ADJUSTMENT
The pressure switch shown in the figure acts to keep the
boiler pressure constant by engaging or de-activating the electrical
heating resistance.
heating resistance.
This pressure switch is already calibrated to 1.1-1.3 bar during the
initial machine testing stage, but should a different working pressure
be required, it is possible to vary the operational field of the pressure
switch using the regulation screw (U); pressure reduction results in
a reduction in temperature, whilst increasing the pressure will also
increase the water temperature.
initial machine testing stage, but should a different working pressure
be required, it is possible to vary the operational field of the pressure
switch using the regulation screw (U); pressure reduction results in
a reduction in temperature, whilst increasing the pressure will also
increase the water temperature.
The regulation direction is shown in the figure and on the pressure
switch itself.
switch itself.
The pressure varies by 0.1 atm for every complete screw turn,
Warning: Disconnect the electricity supply before
undertaking this operation.
undertaking this operation.
6.3 PUMP PRESSURE CALIBRATION
Insert the filter holder into the unit filled with regularly ground, dosed
and pressed coffee.
Switch on the unit switch (E90) (17) or the unit control keyboard
(D90) (16) and read the pressure on the pump pressure gauge
(11).
NB: The correct pressure is of 8-9 atm.
Should the pressure indicated on the pressure gauge be incorrect,
turn it clockwise to increase the pump pressure and anti-clockwise
to reduce the pressure.
Once adjustment is complete check pump calibration by delivering
one or more coffees.
and pressed coffee.
Switch on the unit switch (E90) (17) or the unit control keyboard
(D90) (16) and read the pressure on the pump pressure gauge
(11).
NB: The correct pressure is of 8-9 atm.
Should the pressure indicated on the pressure gauge be incorrect,
turn it clockwise to increase the pump pressure and anti-clockwise
to reduce the pressure.
Once adjustment is complete check pump calibration by delivering
one or more coffees.
Z= Pump pressure adjustment screw.
Warning !!
When the machine is new the filter-holder sump may not be
aligned (perpendicular to the machine itself) as shown in
the figure at the side, however this does not effect the efficient
function of the same.
After a short period of use the sump will gradually settle into
a correct position.
When the machine is new the filter-holder sump may not be
aligned (perpendicular to the machine itself) as shown in
the figure at the side, however this does not effect the efficient
function of the same.
After a short period of use the sump will gradually settle into
a correct position.
A = Position of closed filter-holder with new machine.
B = Position of closed filter holder with machine after a short
period of use.
6.4 FILTERS FOR COFFEE MACHINE
Depending on the quantity of coffee ground, the appropriate filter
must be as shown below to avoid that, once the coffee has dripped
out, the leftover powder remains attached to the nozzle.
must be as shown below to avoid that, once the coffee has dripped
out, the leftover powder remains attached to the nozzle.
IMPORTANT: N°2 under-tile packings with are thinner
(8.1mm ) than that fitted as standard are included. These
packings may be used in the event of difficulty with insertion
of the filter holder.
(8.1mm ) than that fitted as standard are included. These
packings may be used in the event of difficulty with insertion
of the filter holder.
NF08/002/B
1 coffee cup of 5,5 gr.
÷ 6,5 gr.
pod for 1 coffee
barley pod for 1 dose
NF08/004/B
1 coffee cup of 6 gr.
÷ 7 gr.
NF08/005/B
2 coffee cups of 12 gr.
÷ 14 gr.
NF08/009/B
Double pod for 2 coffees
The filter may be recognised
by the letter “C” printed
inside
Fig.6.03
Fig.6.05
Fig.6.04
U
Z
20 mm
24,5 mm
24,5 mm
21 mm
Fig.6.06
A