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espresso coffee machine - instructions for technician

3.5 STARTING THE MACHINE

Before starting the machine, make sure that the level of water in the boiler is higher than the

minimum level on the level-check window

(1)

. If there is no water (first installation or after boiler

maintenance), it is necessary to fill the boiler in advance, so as to prevent overheating of the

heating element. Proceed as follows:

Switch

Open the water tap of the water mains and of the softener.

Using manual fill

(2)

fill the boiler with water until the optimal level is restored.

Turn the switch to position “

” and wait for the machine to warm up completely.

Commutator

Open the water tap of the water mains and of the softener.

Turn the switch to position “

” (electrical power supplied to the pump for automatic boiler filling

and machine services) and wait for the boiler to be automatically filled with water.

Turn the switch to position “

” (full electrical power supplied, including the heating element in the

boiler) and wait for the machine to warm up completely.

For the installation of the most suitable injector, see the table shown

alongside.

WARNING

Do not under any circumstances attempt to light the gas

without ﬁ rst installing the proper injector. As soon as con-

nection is complete, check for any gas leaks by placing a

soapy solution on all connections.

WARNING

• during the machine’s warm-up phase (roughly 20 minutes), the negative pressure valve will release steam for a few seconds until the

valve itself closes

• before using the machine, run deliveries dry with the filter holder attached for a few seconds to release any air which may be in the

circuit, so that the delivery groups are completely heated

• before using the machine, dispense a few servings of coffee to test the grinding and to check the operating pressure of the machine

1 2

1 Group

ø 1.00 (1.75 kW)

2 Groups

ø 1.10 (2.25 kW)

3 Groups

ø 1.35 (3.20 kW)

4 Groups

ø 1.45 (4.00 kW)

Version

METHANE gas

(18 mbar)

ø 0.60 (1.50 kW)

ø 0.65 (1.75 kW)

ø 0.80 (2.50 kW)

ø 0.85 (3.00 kW)

LPG

(28/37 mbar)

Switch

Commutator

3.6 EXTERNAL MOTOR PUMP ADJUSTMENT

To adjust operating pressure proceed as follows:

• Use a coffee delivery switch.

• Adjust the pressure by turning the screw located on the pump

(3)

so as to obtain a pressure

of between 8 and 9 bar. Tightening the screw increases pressure, and loosening it reduces

pressure. Check the pressure by means of the gauge

(4)

located on the front part of the

machine;

• turn off the delivery switch;

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