47
Drinking water filter (if installed)
To maintain high hygiene standards, proceed as fol-
lows:
■
Replace the filter element on non-backwashing filters
every 6 months (visual inspection every 2 months).
■
On backwashing filters, backwash every 2 months.
Replacing fuses
Danger
Contact with 'live' components of the control unit
can lead to fatal injury due to electric shock.
Only a heating contractor may replace fuses.
Overview of maintenance and cleaning work
Heating system inspection and maintenance
For work on the heating system, see chapter "Heating
system inspection and maintenance", page 46.
Maintenance and cleaning work on the boiler
Have a heating contractor clean the interior of the
boiler twice a year.
Interval
Activities
See page System user
Heating contrac-
tors
Every 7 days
Check the fill level of the ash box and
empty it if required.
X
Visually inspect the light barriers and
clean them if required.
X
After 2000 to 4000 hours run
*1
Clean combustion chamber and combus-
tion grate
X
Clean flue gas fan
X
Clean Lambda probe
X
Clean flue gas collector chamber
X
Check heat exchanger pipe; clean if nec-
essary
X
Clean the reversing chamber
X
Clean the ash chamber and ash removal
parts
X
Check the light barriers and sight glasses;
clean if necessary
X
Check expansion vessel and system
pressure
X
*1
4000 hours when operating with pellets, 2000 to 4000 hours when operating with woodchips, interval subject to fuel quality.
Maintenance
Heating system inspection and maintenance
(cont.)
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