Cleaning; Inspection And Maintenance - Viessmann VITOCAL 222-G Operating Instructions Manual

Repairs

Cleaning

All equipment can be cleaned with a
commercially available domestic clean-
ing agent (non-scouring).

Inspection and maintenance

The inspection and maintenance of a heating system is specified by the Energy Sav-
ing Order [EnEV - Germany] and the DIN 4755, DIN 1988-8 and EN 806 stand-
ards.
Regular maintenance ensures trouble-free, energy-efficient and environmentally
responsible heating. For this, we strongly advise you to arrange an inspection and
maintenance contract with your local heating contractor.
DHW cylinder
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.
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.
In this connection, observe the manufac-
turer's instructions.
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.
Maintenance
47