Technical data

Linea 24 & 28
23
8.6 Main Burner and Electrodes
Part No's
Sense Electrode - 24&28 - 2092
Refer to figs. 27,28 & 29
8.6.1 Gain general access as 8.4.
8.6.2 Remove room sealed front cover as 8.5
8.6.3 Remove front of combustion chamber by re-
leasing screws (fig. 28).
8.6.4 Remove four burner retaining screws (fig. 30).
Ease burner forward and rest on chamber
base (fig. 29).
8.6.5 Release electrode and earth retaining screws
& carefully remove electrode.
8.6.6 Trace electrode and earth lead to electronic
ignition control and gas valve and disconnect
8.6.7 Remove main burner.
8.6.8 Reassemble in reverse order ensuring cor-
rect location of electrode, and solid earthing
point.
Note: If difficulty is found in relocating the
burner securing screws, easier access can be
gained by removing the two side panels
(fig. 29).
8.7 Main Burner Injectors
8.7.1 Gain general access as 8.4
8.7.2 Remove room sealed front cover plate and
combustion chamber front (8.5 & 8.6.3).
8.7.3 Remove main burner (8.6.4 to 8.6.8).
8.7.4 Unscrew injector(s) from burner bar.
8.8 Main Heat Exchanger
Part No's 24- 2371, 28-2378
Refer to Fig. 30
8.8.1 Gain general access as 8.4
8.8.2 Remove room sealed front cover plate (8.5).
8.8.3 Remove front of combustion chamber (8.6.3).
8.8.4 Remove two air baffle plates, 1 screw securing
each (fig. 31).
8.8.5 Remove electrical plug from primary thermistor
Remove both side panels, 2 screws each
(fig. 29)
8.8.6 Close heating flow and return valves by turn-
ing 1/4 turn until indicating lines are horizon-
tal. Pull lever on head of safety valve to drain
primary circuit to boiler.
8.8.7 Place cloth under heat exchanger to catch
surplus water.
8.8.8 Unscrew unions on either side of main heat
exchanger fig. 30.
8.8.9 Slide out main heat exchanger, taking care
not to damage insulation panels. Avoid spill-
age of water on boiler electrics.
8.8.10 Reassemble in reverse order using new fibre
washers in unions.
Fig. 29
Fig. 30
Side
Panel
Screw
Fig. 29 a