88
Maintenance
Maintenance details
- Turn the unit up side down and
remove the burner cassette (8) from
the ventilator unit;
- Check the burner cassette for
wear and tear, pollution and any
breakages. Clean the burner
cassette with a soft brush and
vacuum cleaner. In the case
of cracks, always replace the
complete burner cassette (8);
The following operations must be
performed carefully in relation to the
vulnerability of the non return valve.
- After removing the burner cassette
(8) the non return valve (12)
becomes visible. Check if the non
return valve entire circumference
closes / seals completely. The valve
(12) should be able to move freely
from fully open to fully closed.
Replace the non return valve if the
valve does not seal properly. Follow
the instructions supplied with the
new part.
- Replace the gasket (9) between the
burner (8) and upper casing (10) ;
- Replace the gasket (11) between
the upper casing (10) and
exchanger.
- Check the venturi (13) for pollution
and clean them with a soft brush in
combination with a vacuum cleaner,
if necessary.
If the inside of the boiler casing is
heavily polluted with dust, it is likely
that the fan impeller is also polluted.
To clean the fan, it has to be removed
from the upper tray and the venturi.
Clean the impeller with a soft brush and
a vacuum cleaner. Replace the gasket
and take care that the new gasket is
installed properly when reassembling
the fan parts.
Reassembly takes place in reverse
order.
Heat exchanger
- Check the heat exchanger for
pollution. Clean it, if necessary, with
a soft brush and a vacuum cleaner.
Avoid any pollution falling down.
NOTE: TOP-FLUSHING THE
EXCHANGER WITH WATER IS NOT
ALLOWED.
Reassembly takes place in reverse
order.
During installation pay attention to
the correct position of the clamp bars.
These have to be in a vertical position.
11
8
9
10
12
13
12
x
x
