Maintenance; Cleaning The Mechanical Ventilation System - Viessmann Vitotronic 200 Operating Instructions Manual

Heating system inspection and maintenance
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.
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.
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 special cables or lines. Only use
Viessmann cables / lines as replacement. For this,
notify your qualified contractor.

Cleaning the mechanical ventilation system

■ The casing of the ventilation unit can be cleaned with
a commercially available domestic cleaning agent.
Do not use scouring agents.
Clean or replace the outdoor air and extract air filters
■
in the ventilation unit as well as the filters in the
extract air vents regularly. Replace the filters at least
once a year.
!
Please note
Dust deposits in the appliance can result in
malfunctions
Never start the appliance without outdoor air
and extract air filters.
Cleaning the supply air/extract air vents
Light contamination
Wipe the outside of the supply/extract air vents with a
damp cloth.
(cont.)
Water may drip from the safety valve during a heat-up
process. The outlet is open to the atmosphere and
must not be closed off.
■ We recommend that the ventilation unit and the duct-
work are serviced and, if necessary, cleaned at least
annually by your contractor.
We recommend entering into a maintenance contract
■
with your contractor.
Failure to carry out maintenance represents a risk
factor. Regular cleaning and maintenance ensure
that the operation remains hygienic, environmentally
sound and energy efficient.
Heavy contamination
!
Please note
Dust will settle inside the ductwork if the
mechanical ventilation system is operated with-
out filters. This increases the air pressure drop.
Switch the ventilation unit off before removing
the extract air vents: see chapter "Stopping ven-
tilation to change the filters".

Maintenance

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