Maintenance And Cleaning; Care, Inspection And Maintenance - Viessmann VITOLIGNO 300-H Operating Instructions For The System User

Maintenance and cleaning

Care, inspection and maintenance

Regular maintenance ensures trouble-
free, energy-efficient and environmen-
tally responsible heating. For this, we
strongly advise you to arrange an
inspection and maintenance contract
with your local heating contractor.
Boiler
Increasing boiler contamination raises
the flue gas temperature and thereby
increases energy losses. The boiler
must therefore be thoroughly cleaned by
a heating contractor twice a year.
DHW cylinder (if installed)
Standards DIN 1988-8 and EN 806 spec-
ify that maintenance and cleaning should
be carried out no later than 2 years after
commissioning and as required there-
after.
Only a qualified heating contractor
should clean the inside of a DHW cylin-
der and the DHW connections.
If any water treatment equipment (e.g. a
sluice or injection system) is installed in
the cold water supply of the DHW cylin-
der, ensure this is refilled in good time.
For this, observe the manufacturer's
instructions.
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Additionally, for DHW cylinder with sac-
rificial anode:
We recommend that the correct function
of the sacrificial anode is checked annu-
ally by your heating contractor. The func-
tion of the sacrificial anode can be
checked without interrupting the system
operation. The heating contractor will
check the earth current with an anode
tester.
Safety valve (DHW cylinder)
Check the safety valve function every six
months by venting, or have it checked by
your heating contractor. The valve seat
may become contaminated (see the
valve manufacturer's instructions).
Drinking water filter (where installed)
For reasons of good hygiene:
■ Replace the filter element on non-
backwashing filters every 6 months
(visual inspection every 2 months).
■ On backwashing filters, backwash
every 2 months.