39
– loosen the clips (6) and extract the air inlet pipe (7)
– unscrew the swivel joint (8)
– extract the connectors (9) from the fan and disconnect the
electrode cable (10)
6
9
10
6
7
8
Fig. 40
– Unscrew the four nuts (11) securing the combustion
chamber door (12)
– pull the fan-sleeve-door assembly (13) forwards and remove
it.
11
11
13
12
Fig. 41
m
CAUTION
Work carefully when removing the assembly (13) to
prevent any damage occurring to the internal insulation
of the combustion chamber and the door seal.
8.3.2 Cleaning the burner and the combustion
chamber
The combustion chamber and the burner do not require any
particular maintenance. Simply brush them with a soft brush.
8.3.3 Checking the ignition/detection electrode
Check the state of the ignition/detection electrode and replace
if necessary. Check the measurements as per the drawing
whether the ignition/detection electrode is replaced or not.
6
+0,5
-0,5
4,5
+0,5
-0,5
Fig. 42
8.3.4 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 (12) 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 (11)
of the door to the combustion chamber
– reconnect the connections to the fan and the electrode.
8.4
Checks
8.4.1 Checking the flue
Check that the flue is undamaged and complete.
8.4.2 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 section
Expansion vessel" page 17.
8.4.3 System Inhibiter concentration
Check and if required correct the inhibiter concentration.
Once the checks described above have been completed:
– refill the boiler as described in section "SYSTEM Filling
page 29"
– check that the siphon has been filled correctly
– activate the "Chimney sweep function" page 35 and carry
out combustion analysis as detailed in Appendix 2
– refit the front panel securing it with the two screws which
were removed previously
– complete the service record in this manual.
