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commISSIoNING AND mAINtENANcE
disassembling the burner
- Close the inlet gas valve.
- Remove the front panel of the boiler.
- Unplug the fan plugs (24 Volt), the ignition cable, the gas valve control and
the ignition electrode earth.
- The upper jacket panel is removable for an easier access.
- Loosen the 4 burner nuts using a ratchet wrench.
- Unscrew the three-way coupling on the gas pipe.
- In one unit, lift up the burner with the fan and the gas valve to remove them
from the exchanger. Be careful not to damage the burner insulation in the
exchanger.
- Check the condition of the insulation and the seals and replace them if
necessary before re-assembling the burner following the same procedure
but in the reverse order.
disassembling and checking the
electrode
- Remove the ignition cable.
- Remove the two fixing screws.
- Remove the electrode earth but make sure the serrated washer is fixed
between the earth cable and the electrode when re-assembling.
- Check the condition of the seals and replace them if necessary before
re-assembling the electrode following the same procedure but in the
reverse order.
disassembling the exchanger
- Drain the water from the central heating system using the connection
under the appliance.
- Allow the appliance to drain completely.
- Dismantle the electrical connections downstream from the burner, as well
as the NTCs.
- Dismantle the exchanger central heating flow pipes and return pipes.
Exercise caution when dismantling the parts as residual water may escape
from the exchanger.
- Dismantle the connection at the siphon and remove the nut between the
siphon and the exchanger.
- Lift up the exchanger in one piece standing upright. The exchanger detaches
from its hook and is fully released.
- Check the condition of the seals and replace them if necessary before
re-assembling the exchanger.
cleaning the heat exchanger
- Remove the burner assembly as described above.
- Remove the burner gasket.
- Clean the combustion chamber using a vacuum cleaner.
- Disconnect the flue pipe from the exchanger.
- Check if the condensates collector is clean, if necessary, clean it.
- Check the burner insulation and the burner gasket; replace the parts if
necessary.
- Check the igniter, replace if necessary
- Reassemble the burner and check for leakages.
- Power up the appliance, set the boiler in full power mode and recheck for
leaks.
- Check the gas pressure and the CO2 level as explained in previous paragraf.
Summary of Contents for Prestige 24 Excellence
Page 41: ...ML 1 664Y4000 A ...
