Safety Valve (Dhw Cylinder); Potable Water Filter (If Installed) - Viessmann VITODENS Operating Instructions Manual

Repair work
Inspection and maintenance
The function of the sacrificial anode can
be checked without interrupting the sys-
tem 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 (see the valve manu-
facturer's instructions). The valve seat
may become contaminated.

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.
Damaged connecting cables
If connecting cables of the appliance or
externally installed accessories are
damaged, replace them with special
connecting cables. Replace only with
Viessmann cables. Notify your heating
contractor accordingly.
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(cont.)