Service manual

Service manual E000129004
5
2.2. Burner
F Removal of the burner assembly
Warning: isolate the boiler from the mains
electricity supply before removing any covering or
component.
1 Remove the cover (section 1.4
2 Close the gas inlet gas cock.
3 Remove the fan, gas valve and venturi assembly
(section 2.1).
4 Remove the condensate connection pipe A (Fig. 11).
5 Unscrew the five Allen key screws B and lower the
condensate collector C that holds the burner.
6 To remove the burner from the condensate collector
unscrew the Allen Key screws D (Fig. 12).
7 Re- assemble the parts following the removal
procedures in the reverse order.
Fig. 11
Fig 12
F Removal of internal turbulators
To remove the turbulators placed inside the burner remove the
burner as explained in the previous section and unscrew the
screw E (Fig. 13).
Fig 13
Follow the indications given in Fig. 13 and Fig. 14 to re-
assemble correctly the turbulators.
Fig 14
The disk 6 is thinner than the disk 1.
All the spacers (3, 5, 7 and 9 in Fig. 14) have the same
length.
Warning: After cleaning or replacement as detailed
above refer to section Combustion adjustment check in
the chapter Commissioning of the installation instructions
manual.
2.3. Pump
The pump has the function of making the water in the
main circuit circulate through the main heat exchanger
and therefore through the c.h. system (during the c.h.
function) or through the d.h.w. heat exchanger (during
the d.h.w. function).
F Removal
Warning: isolate the boiler from the mains
electricity supply before removing any covering or
component.
1 Remove the cover (section 1.4)
2 Empty the main circuit (section 1.5)
3 Lower the control panel (section 1.7)
4 Disconnect the connector A (Fig. 15).
5 Unscrew the Allen screws B and remove the pump.
6 Re- assemble the parts following the removal
procedures in the reverse order.
1
1
2
4
6
8
E
9 8 7 6 5 4 3 2 1 E