Starting The Machine; External Motor Pump Adjustment - Wega Espresso Coffee Machine Use And Maintenance Manual

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.

3.6 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 "1" 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 "1" (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 "2" (full electrical power supplied, including the heating element in the
boiler) and wait for the machine to warm up completely.
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

3.7 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;
espresso coffee machine - instructions for technician
METHANE gas
Version
(18 mbar)
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)
LPG
(28/37 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)
1
2
0
1
Switch
0
1 2
Commutator
3
4
English
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