Wega EVD Use And Maintenance Manual

TECHNICIANS' manual42 of 100
Component Type of operation Quarterly Yearly
HEATING UNIT
Replace the electric heating element if it becomes faulty or malfunctions.
Do not replace the heating element with a more powerful one. Before making
any changes, please contact the Manufacturer.
If the thermostat of the heating element is triggered, reset it by pressing the
central button of the thermostat. However, before starting the machine up again,
check what caused the problem.
If the heating unit insulation needs to be removed, restore the insulation after
the maintenance work has been completed.
Remove and clean the heating unit level probes.
Check for lime scale deposits on the heating element, on the exchanger (inside
and out).
If there is a lot of limestone build-up, this indicates that the water lter has not
been replaced, or that the softener has not been regenerated.
When replacing any components, always replace the relative gasket as well.
X
SAFETY VALVE SCNR
VALVE
NEGATIVE PRESSURE
VALVE
Check that the safety valves, non-return drain valves and negative pressure valves
are operating properly, as indicated in para. 7.3.4 - 7.3.5 - 7.3.6.
If these need to be replaced due to malfunction, repeat the check with the new-
ly-installed valve.
X
HYDRAULIC CIRCUIT
Check whether there is any lime-scale build-up in the hydraulic circuit.
When replacing any components, always replace the relative gasket as well.
If there is a lot of limestone build-up in the machine's hydraulic circuit, this
indicates that the water lter has not been replaced, or that the softener has not
been regenerated.
Take care in areas where the water is very hard. The water lter will need to be re-
placed more frequently and the water softener will need to be regenerated more
often, especially if the machine is used intensively.
X
DRAIN
Check for any leaks on the water mains and sewer connections. Check the condi-
tion of the drain tray and the drain connection tube.
X
DISPENSING GROUP Check the efciency of the dispensing group's solenoid valve. X
GAS SYSTEM
Check for any gas leaks with a suitable gas detection instrument, or by wiping a
soapy solution over all the gas system ttings.
X
WATER and STEAM
NOZZLES
Check the condition of the nozzles and clean the sprayer. X
DOSING DEVICE
Check and clean the volumetric dosing device by removing any oxidation
from the tips.
X
PRESSURE GAUGE AND
PRESSURE SWITCH
Check that the dosing device and pressure switch are working properly. X
VOLUMETRIC DOSING
DEVICE
Check and clean the volumetric dosing device by removing any oxidation
from the tips.
X
MOTOR PUMP Visually inspect the condition of the machine’s wires. X
If any work is carried out on the machine elec-
tronics when the machine is still live, any guar-
antee will automatically be invalidated.
All original spare parts are available from the
Manufacturer’s website. The Manufacturer may
provide the list of spare parts recommended for
the maintaining the various versions of the machine.

Wega EVD Specifications

General

Brand	Wega
Model	EVD
Category	Coffee Maker
Language	English