Maintenance - Viessmann VITODENS Series Operating Instructions Manual

Maintenance

Maintenance
Cleaning
All equipment can be cleaned with a
commercially available domestic clean-
ing agent (non-scouring).
Inspection and maintenance
Inspection and maintenance of your
heating system is prescribed by the
Energy Savings Order and DIN 4755,
DVGW-TRGI 2008 and DIN 1988-8.
Regular maintenance ensures trouble-
free, energy efficient, environmentally
responsible and safe heating. Your heat-
ing system must be serviced by an
authorised contractor at least every
2 years. For this, we advise you to
arrange an inspection and maintenance
contract with your local heating contrac-
tor.
Boiler
Increasing boiler contamination raises
the flue gas temperature and thereby
increases energy losses. For that rea-
son, all boilers should be cleaned annu-
ally.
DHW cylinder (if installed)
The DIN 1988-8 and EN 806 specify that
maintenance and cleaning should be
carried out no later than two years after
commissioning and thereafter as
required.
Only a qualified heating contractor
should clean the inside of a DHW cylin-
der and the DHW connections.
32
Refill any water treatment equipment
(e.g. a lock or injection system) in good
time, if such equipment is installed in the
cold water supply of the DHW cylinder.
Observe the manufacturer's instruc-
tions.
Additionally for a Vitocell 100:
We recommend that the correct function
of the sacrificial anode is checked annu-
ally by your heating contractor.
The anode function can be checked with-
out interrupting the system operation.
The heating contractor will check the
earth current with an anode tester.
Safety valve (DHW cylinder)
The safety valve function should be
checked every six months by venting,
either by the system user or the local
heating contractor. The valve seat may
become contaminated (see the valve
manufacturer's instructions).
Potable water filter (if installed)
To maintain high hygienic standards,
proceed as follows:
■ Replace filter element on non-back
flushing filters every six months (visual
inspection every two months).
■ On back flushing filters, back flush
every two months.