Manual Isomac PRO 3.1 (page 22 of 36) (English, German, Italian)

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5 – FIRST USE OR REUSE

Follow carefully the instructions before using the machine.

• open the external packing and take the machine out. Inspect the

machine to ascertain that it is intact and in good condition. Check

for the presence of all the accessories supplied with the machine

(see paragraph 4)

• position the machine on a flat surface

• remove the cover and take out the water tank (2) (located inside

the machine) and rinse it

• fill the container with clean water, return it to its housing and

insert the silicon tubes. Close the cover on the machine.

The machine PRO 6.1 offer the versatility of use with water tank (2)

or with connection to the water supply, using the appropriate pipe

supplied (17). (SEE PAR. 5.1)

To use the machine with water tank (2) the switch (Z) has to be in

position I (operation to be performed with the machine off).

WARNING! Before making the electric connection,

make sure that the main power voltage corresponds

to the specifications indicated on the data plate placed

under the base of the machine.

Press the main power switch (1). Wait about 2 seconds to allow

the circuit to perform a control check. The pilot light (14) will be

switched on. To use the machine connected to the water network,

position the switch (Z) on II (operation to be performed with the

machine off).

Removing the cap (W) from the tray and connecting the silicon

tube (25) to the pan (Y) you can download directly into the water

drainage pipe. (see FIG.2)

The automatic level indicator will start filling the boiler with water

until it automatically reaches the prescribed level; the boiler water

level is automatically checked and the prescribed level will be

automatically refilled.

Then wait until the machine reaches the 1.1 – 1.3 bar operating

pressure, by checking the boiler pressure on the pressure gauge

(5).

The machine with a basin built-in is provided with a safety device

controlling the amount of water contained in the basin itself;

The green light (14) flashes to indicate the lack of water in the tank

(2) and the device automatically cuts off all machine functions.

As it is filled up, the warning light switches off and the machine is

ready again to deliver coffee.

Fill the filter holder (12) with the brewing group (11)

Thanks to the working of the lever group (15), brew some water to

avoid the correct refilling of the coffee exchanger.

WARNING ! The coffee brewing and the power supply

of the heating element don’t work when the water

tank lamp (14) flashes.

During start-up: when the boiler pressure gauge (5) shows a

pressure of approximately 0.5 bar, open slowly the steam tap

handle (7), to discharge the air contained in the boiler, and wait

until steam starts flowing out of the steam supply nozzle (10), then

close it.

Wait for the reaching of the pressure and the correct thermic balan-

ce, after 10 minutes.

5.1 - WATER SYSTEM

Caution! The machine must be supplied with water having a

hardness above 8°F degrees.

It is advisable to install a water softener for the machine water

system. Ensure that you will be connecting the machine to drinka-

ble water mains.

The connection to the water supply of the machine must be in

accordance with the country of destination.

The pressure of water entering the machine must not exceed

0,65Mpa

- Connect the hose (17) to the connector (X) located under the

machine and then connect it to the water mains.

- As far as the mains pressure is concerned, if this exceeds 0,5Mpa

(5bar), it is advisable to install a balanced pressure reducer for

high pressure (a device whereby any mains increase does not

affect the output pressure).

5.2 PRESSURE SWITCH REGULATION (Only PRO 6.1 and PRO

5.1 Models)

The pressure switch shown in the picture has to keep the pressure

in the boiler constant, by activating or deactivating the electrical

heating element.

This pressure switch is adjusted during the final testing of the

machine on a 1.1÷1.3 bar value; however, if the specific case

requires a different operating pressure, the pressure switch ope-

rating range can be changed by operating on the regulation

screw (U): by reducing the pressure, you will obtain a temperature

reduction, by increasing the pressure, the water temperature also

increases.

The regulation sense is shown in the picture and also on the pres-

sure switch itself. The pressure changes approximately 0.1 atm for

each complete turn of the screw.

5.3 - PUMP PRESSURE

SETTING (Only PRO 6.1 and

PRO 5.1 Models)

Insert in the brewing unit the

filter-holder filled with properly

ground, dosed and pressed

coffee. Activate the lever

group endowment (15) and

read the pressure on the pump

manometer (4).

Note: The correct pressu-

re is 8/9 bar.

If the pressure displayed by the

manometer should not prove

correct, operate the pump pressure regulation screw (R - Fig.3), by

turning it clockwise to increase pump pressure or anticlockwise to

reduce pressure.

Once regulation is complete, check the pump setting by delivering

one or more coffee servings.

6 - COFFEE PREPARATION

Fig. 1

Fig. 2

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Isomac PRO 3.1 Manual

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