69
7.3.4
Cleaning the smoke exchanger
Remove the cover (17) by unscrewing the two screws and re-
move any carbon deposits.
17
Fig. 167
7.3.5
Final operations
After having cleaned the combustion chamber and the burner:
– remove any carbon residue
– check that the seal and the insulation of the door (15) to the
combustion chamber are undamaged. Replace if necessary
– refit the assembly by carrying out the same operations for
removal but in the reverse order and tighten the screws (14)
of the door to the combustion chamber
– reconnect the air duct and tighten the clips
– reconnect the connections to the fan and the electrode
– refit the expansion vessel in its original position.
7.3.6
Cleaning the heat pump
The only maintenance work required on the heat pump is
cleaning of the evaporator with a suitable tool (a form of brush).
7.4
Checks
7.4.1
Checking the flue
Check that the combustion air inlet/outlet ducts and smoke
outlet duct are integral and airtight.
7.4.2
Checking the expansion vessel pressure
Close the flow and return valves and drain the boiler. Check the
expansion vessel pressure is not less than
1 bar
. If this is not
the case, pressurize it to the correct value (see sectionExpan-
Once the checks described above have been completed:
– refill the boiler as described in section "SYSTEM Filling"
– check that the siphon has been filled correctly
– Start the boiler, activate the "Chimney sweep function" and
carry out combustion analysis as detailed in Appendix 2
– refit the front panel, fixing it in place with the two catches (1).
