Calibration
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.
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.
The regulation direction is shown in the
figure and on the pressure
switch itself.
The pressure varies by 0.1 atm for every
complete screw turn,
Pump pressure adjustment
Insert the filter holder into the unit filled
with regularly ground, dosed
and pressed coffee. Press one of the
coffee button and read the pressure on
the pump pressure gauge
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
Disconnect the electricity supply before
undertaking this operation.
!
7
ZagatO
TEC
TEC
Espresso Italia PTY LTD
www.espressoitalia.com.au
Freecall 1300 660 976
