Cleaning - Viessmann VITODENS Operating Instructions Manual

Cleaning

All equipment can be cleaned with a commercially
available domestic cleaning agent (non-scouring).
Clean the surface of the programming unit with the
microfibre cloth provided.
Inspection and maintenance
The inspection and maintenance of a heating system
is prescribed by the Energy Saving Ordinance [EnEV -
Germany] and the DIN 4755, DVGW-TRGI 2008 and
DIN 1988-8 standards.
Boiler
Increasing boiler contamination raises the flue gas
temperature and thereby increases energy losses. For
that reason, all boilers should be cleaned annually.
DHW cylinder (if installed)
Standards DIN 1988-8 and EN 806 specify that main-
tenance and cleaning should be carried out no later
than 2 years after commissioning and as required
thereafter.
Only a qualified heating contractor should clean the
inside of a 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.
In this connection, observe the manufacturer's instruc-
tions.
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 (see the valve manufacturer's
instructions). The valve seat may become contamina-
ted.
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.
Regular maintenance ensures trouble-free, energy effi-
cient, environmentally responsible and safe heating.
Your heating system must be serviced by an author-
ised contractor at least every 2 years. For this, we
strongly advise you to arrange an inspection and main-
tenance contract with your local heating contractor.
In addition for Vitocell 100:
We recommend that the correct function of the sacrifi-
cial anode is checked annually by your heating con-
tractor.
The function of the sacrificial anode can be checked
without interrupting the system operation. The heating
contractor will check the earth current with an anode
tester.
Repair work
35