Beretta EXCLUSIVE X Installer And User Manual page 21

Cleaning the primary heat exchanger and the burner
- Switch off the electrical supply by turning the system's main switch to "Off".
- Close the gas shut-off valve.
- Remove the casing as indicated in "2.6 Removing the casing".
- Disconnect the connecting cables of the electrodes.
- Disconnect the power cables of the fan.
- Take out the clip (A) of the mixer.
- Loosen the nut of the gas train (B).
- Take out and turn the gas train.
- Remove the 4 nuts (C) that fix the combustion unit.
- Take out the air/gas conveyor assembly including the fan and mixer, being careful not to
damage the insulating panel and the electrodes.
Primary heat exchanger
- Remove the siphon connecting pipe from the condensate drain fitting of the heat
exchanger and connect a temporary collecting pipe. At this point proceed with the heat
exchanger cleaning operations.
- Vacuum out any dirt residues inside the heat exchanger, being careful NOT to damage
the retarder insulating panel.
- Clean the coils of the heat exchanger with a soft bristled brush.
b
DO NOT USE METAL BRUSHES THAT COULD DAMAGE THE COMPONENTS.
- Clean the spaces between the coils using 0.4 mm thick blade, also available in a kit.
- Vacuum away any residues produced by the cleaning.
- Rinse with water, being careful NOT to damage the retarder insulating panel.
- Make sure the retarder insulation panel is undamaged and replace it if necessary
following the relative procedure.
- Once the cleaning operations are finished, carefully reassemble all the components,
following the above instructions in the reverse order.
- To close the fixing nuts of the air/gas conveyor assembly, use a tightening torque of
8 Nm.
- Turn the power and gas feeding to the boiler back on.
b
If there are obstinate combustion products on the surface of the heat exchanger,
clean by spraying natural white vinegar, being careful NOT to damage the retarder
insulating panel.
- Leave it to work for a few minutes.
- Clean the coils of the heat exchanger with a soft bristled brush.
b
DO NOT USE METAL BRUSHES THAT COULD DAMAGE THE COMPONENTS.
- Rinse with water, being careful NOT to damage the retarder insulating panel
- Turn the power and gas feeding to the boiler back on.
- Once the operations have been completed, reassemble the components by operating
in the reverse order to what is described.
Burner
- Proceed with the burner cleaning operations.
- Clean the burner with a soft bristled brush, being careful not to damage the insulating
panel and the electrodes.
b
DO NOT USE METAL BRUSHES THAT COULD DAMAGE THE COMPONENTS.
- Check that the burner insulating panel and the sealing gasket are undamaged and
replace them if necessary, following the relative procedure.
- Once the cleaning operations are finished, carefully reassemble all the components,
following the above instructions in the reverse order.
- To close the fixing nuts of the air/gas conveyor assembly, use a tightening torque of
8 Nm.
- Turn the power and gas feeding to the boiler back on.
B
C
A
Cleaning the air filter
- Unscrew the fixing screw A and remove the air filter.
- Blow compressed air on the filter to remove any impurities.
- In case of persistent dirt wash with water.
Replacing of the burner insulation panel
A
- Unscrew the ignition/detection electrode fixing screws and remove it.
- Lever the burner insulation panel (A) out using a blade (as shown in the figure).
- Remove any residual fixing glue.
- Replace the burner insulation panel.
- The new insulation panel doesn't need to be fixed with glue as its shape is designed to
couple perfectly with the heat exchanger flange.
- Reassemble the ignition/detection electrode using the previously removed screws and
replacing the relative sealing gasket.
ENGLISH
EN
25kW
A
30-35-40kW
A
21