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– Unscrew the four nuts (9) securing the combustion chamber
door (10)
– pull the fan/sleeve/door unit (11) forwards and remove it
9 10
11
m
CAUTION
Work carefully when removing the assembly (11) to pre-
vent any damage occurring to the internal insulation of
the combustion chamber and the door seal.
– loosen the four nuts (12) securing the fan (13) and extract the
swing valve (14).
14
12
8.3.2
Cleaning the burner and the combustion cham-
ber
The combustion chamber and the burner do not require any
particular maintenance. Simply brush them with a soft brush.
8.3.3
Check the state of the ignition/detection electrode and replace if
necessary. Check the measurements as per the drawing wheth-
er the ignition/detection electrode is replaced or not.
9
8.3.4
a
Fig. 47
After having cleaned the combustion chamber and the burner:
– remove any carbon residue
– check that the seal and the insulation of the door (10) to the
combustion chamber are integral. Replace if necessary
– mount the swing valve (14) back on with its relative spacer (15)
and the new seal (16); make sure you mount all the compo-
nents with the tab "A" aligned, as shown in the figure
16
15
13
14
Fig. 48
Checking the ignition/detection electrode
Final operations
WARNING
Whenever maintenance is performed on the swing
valve, IT IS MANDATORY to replace the seal (16) code
6174840A.
A
A
Fig. 49
A
Fig. 50
107
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