Wega Concept Use And Maintenance Manual page 31

Checks
PERFORATED DISK and SEAL UNDER THE PAD
Every 4 months, replace
the shower (2) and
gasket under the pad
of the dispenser (4)
group (we
recommend
to use only
genuine parts)
proceeding
as follows:
1
• loosen the screw ( 1);
• remove the containment ring (
• replace the perforated disk ( 2) and the seal under
the pad (4);
• reassemble the components
Verify the correct
operation of the
pressure
limiting valve and
non-return drain valve
as follows:
PRESSURE RELIEF VALVE
• block the pressure switch contacts;
• wait for the boiler pressure to increase
that the valve activates at the maximum pressure
of 2 bar.
NON-RETURN DRAIN VALVE
• activate the delivery groups for about 30 sec-
onds;
• attach a filter holder ( 5) with pressure gauge
(available on request) to the group;
• activate the delivery group, and use the pressure
gauge (6) to monitor the pressure as it increases
up to 8-9 bar;
• check the increase in the pressure due to the
expansion of the heated water up to a value of
approximately 12 bar: reaching this value confi rms
proper operation of the valve, as well as of the
gaskets and solenoid valves seal;
• check the other delivery groups.
Technical manual
4
X
3
2
3);
5
6
and check
Checks
• Verify the correct functioning of the PRESSURE
SWITCHES
• Check for LIME SCALE on heating elements and
boilers.
• Check the effi ciency of the SOLENOID VALVES of
the delivery groups.
• Check for any HYDRAULIC LEAKS and for the ef-
fi ciency of the drains.
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Wegaconcept
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31