62
7.3.4
Cleaning the smoke exchanger
Remove the cover (17) by unscrewing the two screws and
remove any carbon deposits.
17
Fig. 165
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 integral. 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 smoke duct
Check that the combustion air inlet/outlet ducts and smoke
outlet duct are integral and airtight.
7.4.2
Checking the expansion vessel pressure
It is recommended that the expansion vessel on the water side
is drained and that the prefilling pressure is not less than
1 bar
.
If this is not the case, pressurize it to the correct value (see
section
Expansion vessel
".
Once the checks described above have been completed:
– refill the boiler as described in section "
REFILL operations
"
– check that the siphon has been filled correctly
– Start the boiler, activate the "
Chimney sweeper function
" and
carry out a smoke analysis and/or measure the combustion
efficiency
– refit the front panel, fixing it in place with the two catches (1).
