Wega EMA Use And Maintenance Manual

TECHNICIANS' manual34 of 100
6.6.2 Gas heating
(if a gas system has been installed)
• Turn the power switch (A) to position 1.
• Open the gas valve (B) on the mains.
• Press and hold the button (C) and simultaneously press
the ON button (D).Oncetheamehasignited,holddown
the knob (C) for a few seconds, to allow the thermocouple
to activate correctly.
• Thencheckthat the amehasignitedthroughthewin-
dow (E).
• Wait for the operating pressure shown on the pressure gauge
to reach the working value of 0.1-0.12 MPa (1-1.2 bar).
AD
C BE
6.6.3 Electric + gas heating
(if a gas system has been installed)
During the machine's heating-up phase
(roughly 20 minutes), the negative pressure
valve will release steam for a few seconds until
the valve closes. Do not open the gas mains when the
heating unit is empty.
• Proceed as indicated in the previous paragraph.
• Aftercheckingthattheamehasignited,turnthepower
switch (A) to position 2. In this way the heating unit's
heating element is powered and the operating pressure
will be reached more quickly.
• Wait for the operating pressure shown on the pressure
gauge to reach the working value of 0.1-0.12 MPa (1-1.2
bar).
6.6.4 Turning off the machine
Turn off the machine using the main switch or power switch.
6.7 Water renewal
When the machine is being installed, the Technician must re-
place the water inside the hydraulic circuits by following these
steps:
• When the installation is complete, the appliance must be
started, brought to the nominal working condition and
left in the “ready-to-operate” status for 30 minutes.
• Next, the appliance has to be turned off and fully emptied
oftherstwaterintroducedintotheentirehydrauliccir-
cuit, in order to eliminate any initial impurities.
• Theappliancemustthenbe lled again withwaterand
brought to nominal working conditions.
• Upon reaching the “ready-to-operate" status, the follow-
ing dispensing operations must be performed:
- Continually dispense from each coffee group, in order
to empty at least 0.5 litres from the coffee circuit. If
there are several dispensing points attached to the
same exchanger/coffee heating unit, divide the vol-
ume by the number of dispensing points.
- Empty the heating unit of all its hot water by contin-
uouslydispensingthroughthespecicspout.Ifthere
are multiple dispensing points, divide the volume by
the number of dispensing points.
- Continuously release steam for at least 1 minute from
each steam dispensing point.
If the machine remains inactive for longer than
a week, the Technician must renew 100% of the
water inside the hydraulic circuits, as indicated
above.
Before using the machine, run a few empty dis-
pensing cycles with the lter holder attached
for a few seconds to release any air inside the
circuit and in turn, allow the dispensing groups to fully
heat up.
Before using the machine, dispense a few cof-
fees to test the grind neness and to check the
operating pressure of the machine.

Wega EMA Specifications

General

Brand	Wega
Model	EMA
Category	Coffee Maker
Language	English