Wega WBAR EVD User Manual

TECHNICIANS' manual
- English -
32 di 52
7.4 Maintenance
7.4.1 Scheduled maintenance
Perform the following maintenance according to the specified frequency.
If the machine is used intensively, the checks need to be performed more frequently.
Component Type of operation Quarterly Yearly
PRESSURE GAUGE
Check the heating unit pressure which must be between 0.08 and 0.14 MPa (0.8
and 1.4 bar).
Periodically check the water pressure when coee is being dispensed: check the
pressure indicated on the gauge, which must be in the range of 0.8 to 0.9 MPa
(8 and 9 bar).
X
FILTERS AND FILTER HOLD-
ERS
Check the condition of the filters. Check for any damage on the edge of the fil-
ters and check whether any coee grounds settle in the coee cup, and replace
the filters and/or filter holders, as required.
X
DISPENSING GROUP
Replace the shower screen and group gasket as indicated in para. 7.4.3 on page
33 .
X
WATER FILTER
Replace the water filter cartridge at the frequency indicated by the manufacturer.
If limescale has formed in the hydraulic circuit, the filter will need to be re-
placed.
X
WATER SOFTENER
Carry out the regeneration procedure as instructed by the manufacturer.
Take care in areas where the water is very hard. The water will need to be regen-
erated more frequently, especially if the machine is used intensively.
X
GRINDER-DISPENSER
Check the ground coee dose (around 7 grams each time) and check the degree
of grinding. Grinders must always have sharp cutting edges. Too much powder
in the grounds is an indication that the coee is deteriorating. We recommend
contacting the Technician to replace the flat burrs after every 400/500 kg of
coee, or after every 800/900 kg for conical burrs.
X
HEATING UNIT Replace the water in the heating unit as indicated in para. 6.7 on page 28 . X
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 filter 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 - NEGATIVE
PRESSURE VALVE - MULTI-
FUNCTIONAL DISPENSER
Check that the safety valves, non-return drain valves and negative pressure
valves are operating properly, as indicated in para. 7.4.4 - 7.4.5 - 7.4.6 .
If these need to be replaced due to malfunction, repeat the check with the
newly-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 filter has not been replaced, or that the softener has
not been regenerated.
Take care in areas where the water is very hard. The water filter will need to be
replaced 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 con-
dition of the drain tray and the drain connection tube.
X
DISPENSING GROUP Check the eciency of the dispensing group's solenoid valve. X
WATER and STEAM NOZ-
ZLES
Check the condition of the nozzles and clean the sprayer. X

Wega WBAR EVD Specifications

General

Brand	Wega
Model	WBAR EVD
Category	Coffee Maker
Language	English