Cleaning The Mechanical Ventilation System - Viessmann VITODENS Operating Instructions Manual

Cleaning the mechanical ventilation system

■ The casing of the ventilation unit may be cleaned
with a commercially available domestic cleaning
agent (non-scouring).
Clean the outdoor air and extract air filters in the
■
ventilation unit as well as the filters in the extract air
valves regularly. We recommend replacing these fil-
ters once per year.
!
Please note
Dust deposits in the appliance can result in
malfunctions.
Never start the appliance without outdoor air
and extract air filters.
Cleaning or replacing filters
If "Check filter(s)" is shown in the standard menu, the
filters in the ventilation unit and/or extract air vents are
contaminated.
Cleaning filters
In the case of light contamination, clean filters with the
aid of a vacuum cleaner.
Filter in the ventilation unit
Danger
The ventilation unit terminals are located behind
the r.h. casing door. Contact with 'live' compo-
nents can lead to serious injury from electric cur-
rent.
Never open the r.h. casing door.
■ We recommend that the ventilation unit and the duct-
work are serviced regularly (once per year) and
cleaned if necessary by your HVAC contractor.
We recommend entering into a maintenance contract
■
with your HVAC 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.
Replacing filters
If one of the following conditions applies, replace the
filters:
■ The filters are heavily contaminated.
■ Filters have already been cleaned several times.
The last filter change was more than 12 months ago.
■
Dispose of contaminated filters through domestic
waste.
!
Please note
Dust deposits in the appliance can result in mal-
functions.
Unplug the power supply plug before opening
the ventilation unit.
Maintenance
53