63
Maintenance
Maintenance details
- Pull the complete ventilator unit
and heat exchanger’s gas valve
forward;
- Remove the burner cassette (18)
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
breakages, always replace the
complete burner cassette (18);
- Replace the gasket (17) between
the burner (18) and upper casing
(15) ;
- Replace the gasket (16) between
the upper casing (15) and
exchanger:
Checking the non return valve in the
upper casing, venturi and fan
- Loosen the 2 screws out of the
upper casing with a cross head
screwdriver to release the gas air
dividing plate. Take out the gas air
dividing plate
The following operations must be
performed carefully in relation to the
vulnerability of the non return valve.
- After removing the gas air dividing
plate the non return valve becomes
visible. Check that the non return
valve entire circumference closes
/ seals completely. The valve
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.
- Check the venturi and gas air
dividing plate for pollution and
clean them with a soft brush in
combination with a vacuum cleaner,
if necessary.
If the cover/air box 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 vacuum cleaner.
Prevent any dirt from dropping
down.
Rinsing the exchanger with water
from the top is not allowed.
Assembly is done in reverse order.
Ensure during assembly that the
clamping bars are properly positioned.
They have to be in a vertical position.
15
16
17
18
