24
MAXIN 24e & 28e
Fig. 27
Fig. 28
24e
28e
8.6
Main Burner and/or Spark and Sensing
Electrodes
Part No's
Main burner 24e - 5295 28e - 5317 (N/G)
Spark Electrode - 8478
Sense Electrode - 8301
Refer to fig. 27 & 28
8.6.1
Gain general access as 8.4
8.6.2
Remove room sealed front cover 8.5
8.6.3
Remove front of combustion chamber by
releasing six screws fig. 26
8.6.4
Remove four burner retaining screws fig. 28
ease burner forward and rest on chamber
base.
8.6.5
Release electrode retaining screws &
carefully remove electrodes fig. 27.
8.6.6
Trace electrode lead to electronic ignition
control and disconnect.
8.6.7
Repeat for sensing electrode.
8.6.8
Remove main burner.
8.6.9
Reassemble in reverse order ensuring
correct location of electrodes. Ensure that
left hand electrode is connected to rear
terminal on electronic ignition control box.
Note: If difficulty is found in relocating the
burner securing screws, easier access can
be gained by removing the two side panels
fig. 27.
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. 24e - 5351 28e - 5356
Refer to Fig. 28
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. 29.
8.8.5
Remove both side panels, 2 screws each
fig. 27
8.8.6
Close heating flow and return valves. Note
these are 1/4 turn valves which are open
when the butterfly top is in line with the
valve, closed when the butterfly top is
across the valve. Turn safety valve 1/4 turn
to drain primary circuit of boiler.
8.8.7
Place cloth under heat exchanger to catch
surplus water.
8.8.8
24e
Unscrew unions on either side of main heat
exchanger.
28e
Disconnect upper flanges by removing 2
screws on each flange.
8.8.9
Slide out main heat exchanger, taking care
not to damage insulation panels. Avoid
spillage of water on boiler electrics.
8.8.10
Reassemble in reverse order using new fibre
washers in unions.
