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Viessmann VITODENS 100-W - 2023 Manual

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35
The appliances can be cleaned with a commercially
available domestic cleaning agent (non-scouring).
Clean the surface of the programming unit with a
microfibre cloth.
Inspection and maintenance
The inspection and maintenance of a heating system
is prescribed by the Buildings Energy Act [Germany]
and the DIN 4755, DVGW-TRGI 2018 and
DIN EN 806-5 standards.
Regular maintenance ensures trouble-free, energy effi-
cient, environmentally responsible and safe heating
operation. Your heating system must be serviced by an
authorised contractor at least every 2 years. For this, it
is best to arrange an inspection and maintenance con-
tract with your local contractor.
Appliance
Increased contamination raises the flue gas tempera-
ture and thereby increases energy losses. We recom-
mend the appliance is cleaned annually.
DHW cylinder
Standard EN 806-5 specifies that maintenance and
cleaning should be carried out no later than 2 years
after commissioning and as required thereafter.
Only a qualified contractor should clean the inside of
the DHW cylinder 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 cylinder, ensure this is refilled in good time.
For this, observe the manufacturer's instructions.
Safety valve (DHW cylinder)
The function of the safety valve must be checked
every six months by the user or a contractor through
venting (see valve manufacturer's instructions). The
valve seat may become contaminated.
Water may drip from the safety valve during a heat-up
process. The outlet is open to the atmosphere.
!Please note
Overpressure can cause damage.
Do not close the safety valve.
Potable water filter (if installed)
To maintain high hygienic standards, proceed as fol-
lows:
■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.
Damaged cables / lines
If there is damage to the connecting cables or lines of
the appliance or externally installed accessories, these
must be replaced with Viessmann cables or lines. For
this, contact your qualified contractor.
Maintenance
Cleaning
6167584
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